CVE-2021-47563 (GCVE-0-2021-47563)

Vulnerability from cvelistv5 – Published: 2024-05-24 15:12 – Updated: 2026-05-11 13:57
VLAI
Title
ice: avoid bpf_prog refcount underflow
Summary
In the Linux kernel, the following vulnerability has been resolved: ice: avoid bpf_prog refcount underflow Ice driver has the routines for managing XDP resources that are shared between ndo_bpf op and VSI rebuild flow. The latter takes place for example when user changes queue count on an interface via ethtool's set_channels(). There is an issue around the bpf_prog refcounting when VSI is being rebuilt - since ice_prepare_xdp_rings() is called with vsi->xdp_prog as an argument that is used later on by ice_vsi_assign_bpf_prog(), same bpf_prog pointers are swapped with each other. Then it is also interpreted as an 'old_prog' which in turn causes us to call bpf_prog_put on it that will decrement its refcount. Below splat can be interpreted in a way that due to zero refcount of a bpf_prog it is wiped out from the system while kernel still tries to refer to it: [ 481.069429] BUG: unable to handle page fault for address: ffffc9000640f038 [ 481.077390] #PF: supervisor read access in kernel mode [ 481.083335] #PF: error_code(0x0000) - not-present page [ 481.089276] PGD 100000067 P4D 100000067 PUD 1001cb067 PMD 106d2b067 PTE 0 [ 481.097141] Oops: 0000 [#1] PREEMPT SMP PTI [ 481.101980] CPU: 12 PID: 3339 Comm: sudo Tainted: G OE 5.15.0-rc5+ #1 [ 481.110840] Hardware name: Intel Corp. GRANTLEY/GRANTLEY, BIOS GRRFCRB1.86B.0276.D07.1605190235 05/19/2016 [ 481.122021] RIP: 0010:dev_xdp_prog_id+0x25/0x40 [ 481.127265] Code: 80 00 00 00 00 0f 1f 44 00 00 89 f6 48 c1 e6 04 48 01 fe 48 8b 86 98 08 00 00 48 85 c0 74 13 48 8b 50 18 31 c0 48 85 d2 74 07 <48> 8b 42 38 8b 40 20 c3 48 8b 96 90 08 00 00 eb e8 66 2e 0f 1f 84 [ 481.148991] RSP: 0018:ffffc90007b63868 EFLAGS: 00010286 [ 481.155034] RAX: 0000000000000000 RBX: ffff889080824000 RCX: 0000000000000000 [ 481.163278] RDX: ffffc9000640f000 RSI: ffff889080824010 RDI: ffff889080824000 [ 481.171527] RBP: ffff888107af7d00 R08: 0000000000000000 R09: ffff88810db5f6e0 [ 481.179776] R10: 0000000000000000 R11: ffff8890885b9988 R12: ffff88810db5f4bc [ 481.188026] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 481.196276] FS: 00007f5466d5bec0(0000) GS:ffff88903fb00000(0000) knlGS:0000000000000000 [ 481.205633] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 481.212279] CR2: ffffc9000640f038 CR3: 000000014429c006 CR4: 00000000003706e0 [ 481.220530] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 481.228771] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 [ 481.237029] Call Trace: [ 481.239856] rtnl_fill_ifinfo+0x768/0x12e0 [ 481.244602] rtnl_dump_ifinfo+0x525/0x650 [ 481.249246] ? __alloc_skb+0xa5/0x280 [ 481.253484] netlink_dump+0x168/0x3c0 [ 481.257725] netlink_recvmsg+0x21e/0x3e0 [ 481.262263] ____sys_recvmsg+0x87/0x170 [ 481.266707] ? __might_fault+0x20/0x30 [ 481.271046] ? _copy_from_user+0x66/0xa0 [ 481.275591] ? iovec_from_user+0xf6/0x1c0 [ 481.280226] ___sys_recvmsg+0x82/0x100 [ 481.284566] ? sock_sendmsg+0x5e/0x60 [ 481.288791] ? __sys_sendto+0xee/0x150 [ 481.293129] __sys_recvmsg+0x56/0xa0 [ 481.297267] do_syscall_64+0x3b/0xc0 [ 481.301395] entry_SYSCALL_64_after_hwframe+0x44/0xae [ 481.307238] RIP: 0033:0x7f5466f39617 [ 481.311373] Code: 0c 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb bd 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2f 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10 [ 481.342944] RSP: 002b:00007ffedc7f4308 EFLAGS: 00000246 ORIG_RAX: 000000000000002f [ 481.361783] RAX: ffffffffffffffda RBX: 00007ffedc7f5460 RCX: 00007f5466f39617 [ 481.380278] RDX: 0000000000000000 RSI: 00007ffedc7f5360 RDI: 0000000000000003 [ 481.398500] RBP: 00007ffedc7f53f0 R08: 0000000000000000 R09: 000055d556f04d50 [ 481.416463] R10: 0000000000000077 R11: 0000000000000246 R12: 00007ffedc7f5360 [ 481.434131] R13: 00007ffedc7f5350 R14: 00007ffedc7f5344 R15: 0000000000000e98 [ 481.451520] Modules linked in: ice ---truncated---
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-05-29 16:50 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: efc2214b6047b6f5b4ca53151eba62521b9452d6 , < e65a8707b4cd756d26d246bb2b9fab06eebafac1 (git)
Affected: efc2214b6047b6f5b4ca53151eba62521b9452d6 , < 1f10b09ccc832698ef4624a6ab9a213b6ccbda76 (git)
Affected: efc2214b6047b6f5b4ca53151eba62521b9452d6 , < f65ee535df775a13a1046c0a0b2d72db342f8a5b (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.5
Unaffected: 0 , < 5.5 (semver)
Unaffected: 5.10.83 , ≤ 5.10.* (semver)
Unaffected: 5.15.6 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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{
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              "attackVector": "LOCAL",
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              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
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                "id": "CVE-2021-47563",
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                "role": "CISA Coordinator",
                "timestamp": "2024-05-29T16:50:07.805074Z",
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          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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              "version": "5.15.6",
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                  "versionEndExcluding": "5.10.83",
                  "versionStartIncluding": "5.5",
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                },
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                  "versionEndExcluding": "5.15.6",
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nice: avoid bpf_prog refcount underflow\n\nIce driver has the routines for managing XDP resources that are shared\nbetween ndo_bpf op and VSI rebuild flow. The latter takes place for\nexample when user changes queue count on an interface via ethtool\u0027s\nset_channels().\n\nThere is an issue around the bpf_prog refcounting when VSI is being\nrebuilt - since ice_prepare_xdp_rings() is called with vsi-\u003exdp_prog as\nan argument that is used later on by ice_vsi_assign_bpf_prog(), same\nbpf_prog pointers are swapped with each other. Then it is also\ninterpreted as an \u0027old_prog\u0027 which in turn causes us to call\nbpf_prog_put on it that will decrement its refcount.\n\nBelow splat can be interpreted in a way that due to zero refcount of a\nbpf_prog it is wiped out from the system while kernel still tries to\nrefer to it:\n\n[  481.069429] BUG: unable to handle page fault for address: ffffc9000640f038\n[  481.077390] #PF: supervisor read access in kernel mode\n[  481.083335] #PF: error_code(0x0000) - not-present page\n[  481.089276] PGD 100000067 P4D 100000067 PUD 1001cb067 PMD 106d2b067 PTE 0\n[  481.097141] Oops: 0000 [#1] PREEMPT SMP PTI\n[  481.101980] CPU: 12 PID: 3339 Comm: sudo Tainted: G           OE     5.15.0-rc5+ #1\n[  481.110840] Hardware name: Intel Corp. GRANTLEY/GRANTLEY, BIOS GRRFCRB1.86B.0276.D07.1605190235 05/19/2016\n[  481.122021] RIP: 0010:dev_xdp_prog_id+0x25/0x40\n[  481.127265] Code: 80 00 00 00 00 0f 1f 44 00 00 89 f6 48 c1 e6 04 48 01 fe 48 8b 86 98 08 00 00 48 85 c0 74 13 48 8b 50 18 31 c0 48 85 d2 74 07 \u003c48\u003e 8b 42 38 8b 40 20 c3 48 8b 96 90 08 00 00 eb e8 66 2e 0f 1f 84\n[  481.148991] RSP: 0018:ffffc90007b63868 EFLAGS: 00010286\n[  481.155034] RAX: 0000000000000000 RBX: ffff889080824000 RCX: 0000000000000000\n[  481.163278] RDX: ffffc9000640f000 RSI: ffff889080824010 RDI: ffff889080824000\n[  481.171527] RBP: ffff888107af7d00 R08: 0000000000000000 R09: ffff88810db5f6e0\n[  481.179776] R10: 0000000000000000 R11: ffff8890885b9988 R12: ffff88810db5f4bc\n[  481.188026] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\n[  481.196276] FS:  00007f5466d5bec0(0000) GS:ffff88903fb00000(0000) knlGS:0000000000000000\n[  481.205633] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[  481.212279] CR2: ffffc9000640f038 CR3: 000000014429c006 CR4: 00000000003706e0\n[  481.220530] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[  481.228771] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[  481.237029] Call Trace:\n[  481.239856]  rtnl_fill_ifinfo+0x768/0x12e0\n[  481.244602]  rtnl_dump_ifinfo+0x525/0x650\n[  481.249246]  ? __alloc_skb+0xa5/0x280\n[  481.253484]  netlink_dump+0x168/0x3c0\n[  481.257725]  netlink_recvmsg+0x21e/0x3e0\n[  481.262263]  ____sys_recvmsg+0x87/0x170\n[  481.266707]  ? __might_fault+0x20/0x30\n[  481.271046]  ? _copy_from_user+0x66/0xa0\n[  481.275591]  ? iovec_from_user+0xf6/0x1c0\n[  481.280226]  ___sys_recvmsg+0x82/0x100\n[  481.284566]  ? sock_sendmsg+0x5e/0x60\n[  481.288791]  ? __sys_sendto+0xee/0x150\n[  481.293129]  __sys_recvmsg+0x56/0xa0\n[  481.297267]  do_syscall_64+0x3b/0xc0\n[  481.301395]  entry_SYSCALL_64_after_hwframe+0x44/0xae\n[  481.307238] RIP: 0033:0x7f5466f39617\n[  481.311373] Code: 0c 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb bd 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2f 00 00 00 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10\n[  481.342944] RSP: 002b:00007ffedc7f4308 EFLAGS: 00000246 ORIG_RAX: 000000000000002f\n[  481.361783] RAX: ffffffffffffffda RBX: 00007ffedc7f5460 RCX: 00007f5466f39617\n[  481.380278] RDX: 0000000000000000 RSI: 00007ffedc7f5360 RDI: 0000000000000003\n[  481.398500] RBP: 00007ffedc7f53f0 R08: 0000000000000000 R09: 000055d556f04d50\n[  481.416463] R10: 0000000000000077 R11: 0000000000000246 R12: 00007ffedc7f5360\n[  481.434131] R13: 00007ffedc7f5350 R14: 00007ffedc7f5344 R15: 0000000000000e98\n[  481.451520] Modules linked in: ice\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T13:57:02.765Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e65a8707b4cd756d26d246bb2b9fab06eebafac1"
        },
        {
          "url": "https://git.kernel.org/stable/c/1f10b09ccc832698ef4624a6ab9a213b6ccbda76"
        },
        {
          "url": "https://git.kernel.org/stable/c/f65ee535df775a13a1046c0a0b2d72db342f8a5b"
        }
      ],
      "title": "ice: avoid bpf_prog refcount underflow",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2021-47563",
    "datePublished": "2024-05-24T15:12:51.398Z",
    "dateReserved": "2024-05-24T15:11:00.728Z",
    "dateUpdated": "2026-05-11T13:57:02.765Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2021-47563",
      "date": "2026-09-26",
      "epss": "0.0021",
      "percentile": "0.10086"
    },
    "fkie_nvd": {
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nice: avoid bpf_prog refcount underflow\n\nIce driver has the routines for managing XDP resources that are shared\nbetween ndo_bpf op and VSI rebuild flow. The latter takes place for\nexample when user changes queue count on an interface via ethtool\u0027s\nset_channels().\n\nThere is an issue around the bpf_prog refcounting when VSI is being\nrebuilt - since ice_prepare_xdp_rings() is called with vsi-\u003exdp_prog as\nan argument that is used later on by ice_vsi_assign_bpf_prog(), same\nbpf_prog pointers are swapped with each other. Then it is also\ninterpreted as an \u0027old_prog\u0027 which in turn causes us to call\nbpf_prog_put on it that will decrement its refcount.\n\nBelow splat can be interpreted in a way that due to zero refcount of a\nbpf_prog it is wiped out from the system while kernel still tries to\nrefer to it:\n\n[  481.069429] BUG: unable to handle page fault for address: ffffc9000640f038\n[  481.077390] #PF: supervisor read access in kernel mode\n[  481.083335] #PF: error_code(0x0000) - not-present page\n[  481.089276] PGD 100000067 P4D 100000067 PUD 1001cb067 PMD 106d2b067 PTE 0\n[  481.097141] Oops: 0000 [#1] PREEMPT SMP PTI\n[  481.101980] CPU: 12 PID: 3339 Comm: sudo Tainted: G           OE     5.15.0-rc5+ #1\n[  481.110840] Hardware name: Intel Corp. GRANTLEY/GRANTLEY, BIOS GRRFCRB1.86B.0276.D07.1605190235 05/19/2016\n[  481.122021] RIP: 0010:dev_xdp_prog_id+0x25/0x40\n[  481.127265] Code: 80 00 00 00 00 0f 1f 44 00 00 89 f6 48 c1 e6 04 48 01 fe 48 8b 86 98 08 00 00 48 85 c0 74 13 48 8b 50 18 31 c0 48 85 d2 74 07 \u003c48\u003e 8b 42 38 8b 40 20 c3 48 8b 96 90 08 00 00 eb e8 66 2e 0f 1f 84\n[  481.148991] RSP: 0018:ffffc90007b63868 EFLAGS: 00010286\n[  481.155034] RAX: 0000000000000000 RBX: ffff889080824000 RCX: 0000000000000000\n[  481.163278] RDX: ffffc9000640f000 RSI: ffff889080824010 RDI: ffff889080824000\n[  481.171527] RBP: ffff888107af7d00 R08: 0000000000000000 R09: ffff88810db5f6e0\n[  481.179776] R10: 0000000000000000 R11: ffff8890885b9988 R12: ffff88810db5f4bc\n[  481.188026] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\n[  481.196276] FS:  00007f5466d5bec0(0000) GS:ffff88903fb00000(0000) knlGS:0000000000000000\n[  481.205633] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[  481.212279] CR2: ffffc9000640f038 CR3: 000000014429c006 CR4: 00000000003706e0\n[  481.220530] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[  481.228771] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[  481.237029] Call Trace:\n[  481.239856]  rtnl_fill_ifinfo+0x768/0x12e0\n[  481.244602]  rtnl_dump_ifinfo+0x525/0x650\n[  481.249246]  ? __alloc_skb+0xa5/0x280\n[  481.253484]  netlink_dump+0x168/0x3c0\n[  481.257725]  netlink_recvmsg+0x21e/0x3e0\n[  481.262263]  ____sys_recvmsg+0x87/0x170\n[  481.266707]  ? __might_fault+0x20/0x30\n[  481.271046]  ? _copy_from_user+0x66/0xa0\n[  481.275591]  ? iovec_from_user+0xf6/0x1c0\n[  481.280226]  ___sys_recvmsg+0x82/0x100\n[  481.284566]  ? sock_sendmsg+0x5e/0x60\n[  481.288791]  ? __sys_sendto+0xee/0x150\n[  481.293129]  __sys_recvmsg+0x56/0xa0\n[  481.297267]  do_syscall_64+0x3b/0xc0\n[  481.301395]  entry_SYSCALL_64_after_hwframe+0x44/0xae\n[  481.307238] RIP: 0033:0x7f5466f39617\n[  481.311373] Code: 0c 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb bd 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2f 00 00 00 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10\n[  481.342944] RSP: 002b:00007ffedc7f4308 EFLAGS: 00000246 ORIG_RAX: 000000000000002f\n[  481.361783] RAX: ffffffffffffffda RBX: 00007ffedc7f5460 RCX: 00007f5466f39617\n[  481.380278] RDX: 0000000000000000 RSI: 00007ffedc7f5360 RDI: 0000000000000003\n[  481.398500] RBP: 00007ffedc7f53f0 R08: 0000000000000000 R09: 000055d556f04d50\n[  481.416463] R10: 0000000000000077 R11: 0000000000000246 R12: 00007ffedc7f5360\n[  481.434131] R13: 00007ffedc7f5350 R14: 00007ffedc7f5344 R15: 0000000000000e98\n[  481.451520] Modules linked in: ice\n---truncated---"
        },
        {
          "lang": "es",
          "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: ice: evitar el subdesbordamiento de refcount de bpf_prog El controlador Ice tiene rutinas para administrar los recursos XDP que se comparten entre la operaci\u00f3n ndo_bpf y el flujo de reconstrucci\u00f3n VSI. Esto \u00faltimo ocurre, por ejemplo, cuando el usuario cambia el recuento de cola en una interfaz a trav\u00e9s de set_channels() de ethtool. Hay un problema relacionado con el recuento de bpf_prog cuando se reconstruye VSI: dado que se llama a ice_prepare_xdp_rings() con vsi-\u0026gt;xdp_prog como argumento que ice_vsi_assign_bpf_prog() usa m\u00e1s adelante, los mismos punteros de bpf_prog se intercambian entre s\u00ed. Luego tambi\u00e9n se interpreta como un \u0027old_prog\u0027 que a su vez hace que llamemos a bpf_prog_put, lo que disminuir\u00e1 su recuento. El siguiente s\u00edmbolo se puede interpretar de una manera que, debido al recuento cero de un bpf_prog, se elimina del sistema mientras el kernel todav\u00eda intenta hacer referencia a \u00e9l: [481.069429] ERROR: no se puede manejar el error de p\u00e1gina para la direcci\u00f3n: ffffc9000640f038 [481.077390] # PF: acceso de lectura de supervisor en modo kernel [ 481.083335] #PF: error_code(0x0000) - p\u00e1gina no presente [ 481.089276] PGD 100000067 P4D 100000067 PUD 1001cb067 PMD 106d2b067 PTE 0 [ 481.097141] : 0000 [#1] ANTICIPACI\u00d3N SMP PTI [ 481.101980] CPU: 12 PID: 3339 Comm: sudo Tainted: G OE 5.15.0-rc5+ #1 [ 481.110840] Nombre de hardware: Intel Corp. GRANTLEY/GRANTLEY, BIOS GRRFCRB1.86B.0276.D07.1605190235 19/05/2016 [ 481.122021] RIP: 0010:dev_xdp_prog_id+0x25/0x40 [ 481.127265] C\u00f3digo: 80 00 00 00 00 0f 1f 44 00 00 89 f6 48 c1 e6 04 48 01 fe 48 8b 86 98 08 00 00 48 85 c0 74 13 48 8b 50 18 31 c0 48 85 d2 74 07 \u0026lt;48\u0026gt; 8b 42 38 8b 40 20 c3 48 8b 96 90 08 00 00 eb e8 66 2e 0f 1f 84 [ 481.148991] RSP: ffffc90007b638 68 EFLAGS: 00010286 [481.155034] RAX: 0000000000000000 RBX: ffff889080824000 RCX: 0000000000000000 [ 481.163278] RDX: ffffc9000640f000 RSI: ffff889080824010 RDI: ffff889080824000 [ 481.171527] ffff888107af7d00 R08: 0000000000000000 R09: ffff88810db5f6e0 [ 481.179776] R10: 00000000000000000 R11: ffff8890885b9988 R12: ffff88810db5f4bc [ 481.188026] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 481.196276] FS: 00007f5466d5bec0(0000) GS:ffff88903fb00000(0000) knlGS:0000000000000000 [ 48 1.205633] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 481.212279] CR2: ffffc9000640f038 CR3: 000000014429c006 CR4: 00000000003706e0 [ 481.220530] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 481.228771] DR3: 00000000000000000 DR6: 00000000ffe0ff0 7: 0000000000000400 [481.237029] Seguimiento de llamadas: [481.239856] rtnl_fill_ifinfo+0x768/0x12e0 [481.244602] rtnl_dump_ifinfo+0x525/0x650 [481.249246] ? __alloc_skb+0xa5/0x280 [ 481.253484] netlink_dump+0x168/0x3c0 [ 481.257725] netlink_recvmsg+0x21e/0x3e0 [ 481.262263] ____sys_recvmsg+0x87/0x170 [ 481.2 66707] ? __might_fault+0x20/0x30 [ 481.271046] ? _copia_de_usuario+0x66/0xa0 [481.275591] ? iovec_from_user+0xf6/0x1c0 [ 481.280226] ___sys_recvmsg+0x82/0x100 [ 481.284566] ? sock_sendmsg+0x5e/0x60 [481.288791]? __sys_sendto+0xee/0x150 [ 481.293129] __sys_recvmsg+0x56/0xa0 [ 481.297267] do_syscall_64+0x3b/0xc0 [ 481.301395] Entry_SYSCALL_64_after_hwframe+0x44/0xae [ 481.307238] RIP: 0033:0x7f5466f39617 [ 481.311373] C\u00f3digo: 0c 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb bd 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2f 00 00 00 0f 05 \u0026lt;48\u0026gt; 3d 00 f0 ff ff 77 51 c3 48 83 ec 2 8 89 54 24 1c 48 89 74 24 10 [ 481.342944] RSP: 002b:00007ffedc7f4308 EFLAGS: 00000246 ORIG_RAX: 0000000000000002f [ 481.361783] RAX: ffffffffffffffda RBX: 00007ffedc7f5460 RCX: 00007f5466f39617 [ 481.380278] RDX: 0000000000000000 RSI: 00007ffedc7f5360 RDI: 000000000000003 [ 481.398500] R PA : 00007ffedc7f53f0 R08: 0000000000000000 R09: 000055d556f04d50 [ 481.416463] R10: 0000000000000077 R11: 0000000000000246 R12: ffedc7f5360 [ 481.434131] R13: 00007ffedc7f5350 R14: 00007ffedc7f5344 R15: 0000000000000e98 [ 481.451520] M\u00f3dulos vinculados en: ice ---truncado---"
        }
      ],
      "id": "CVE-2021-47563",
      "lastModified": "2024-11-21T06:36:33.867",
      "metrics": {
        "cvssMetricV31": [
          {
            "cvssData": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 5.5,
              "baseSeverity": "MEDIUM",
              "confidentialityImpact": "NONE",
              "integrityImpact": "NONE",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
              "version": "3.1"
            },
            "exploitabilityScore": 1.8,
            "impactScore": 3.6,
            "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
            "type": "Secondary"
          }
        ]
      },
      "published": "2024-05-24T15:15:21.033",
      "references": [
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "url": "https://git.kernel.org/stable/c/1f10b09ccc832698ef4624a6ab9a213b6ccbda76"
        },
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "url": "https://git.kernel.org/stable/c/e65a8707b4cd756d26d246bb2b9fab06eebafac1"
        },
        {
          "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
          "url": "https://git.kernel.org/stable/c/f65ee535df775a13a1046c0a0b2d72db342f8a5b"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://git.kernel.org/stable/c/1f10b09ccc832698ef4624a6ab9a213b6ccbda76"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://git.kernel.org/stable/c/e65a8707b4cd756d26d246bb2b9fab06eebafac1"
        },
        {
          "source": "af854a3a-2127-422b-91ae-364da2661108",
          "url": "https://git.kernel.org/stable/c/f65ee535df775a13a1046c0a0b2d72db342f8a5b"
        }
      ],
      "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "vulnStatus": "Awaiting Analysis"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/net/ethernet/intel/ice/ice_main.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "e65a8707b4cd756d26d246bb2b9fab06eebafac1",
                    "status": "affected",
                    "version": "efc2214b6047b6f5b4ca53151eba62521b9452d6",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "1f10b09ccc832698ef4624a6ab9a213b6ccbda76",
                    "status": "affected",
                    "version": "efc2214b6047b6f5b4ca53151eba62521b9452d6",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "f65ee535df775a13a1046c0a0b2d72db342f8a5b",
                    "status": "affected",
                    "version": "efc2214b6047b6f5b4ca53151eba62521b9452d6",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "drivers/net/ethernet/intel/ice/ice_main.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "5.5"
                  },
                  {
                    "lessThan": "5.5",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.10.*",
                    "status": "unaffected",
                    "version": "5.10.83",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.15.*",
                    "status": "unaffected",
                    "version": "5.15.6",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "5.16",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "D4843826-EA9A-472B-82EC-B9E4FD4149AD",
                    "versionEndExcluding": "5.10.83",
                    "versionStartIncluding": "5.5",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "990C08FB-0121-4296-896F-556312F8FF3B",
                    "versionEndExcluding": "5.15.6",
                    "versionStartIncluding": "5.11",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc1:*:*:*:*:*:*",
                    "matchCriteriaId": "357AA433-37E8-4323-BFB2-3038D6E4B414",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:5.16:rc2:*:*:*:*:*:*",
                    "matchCriteriaId": "A73429BA-C2D9-4D0C-A75F-06A1CA8B3983",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nice: avoid bpf_prog refcount underflow\n\nIce driver has the routines for managing XDP resources that are shared\nbetween ndo_bpf op and VSI rebuild flow. The latter takes place for\nexample when user changes queue count on an interface via ethtool\u0027s\nset_channels().\n\nThere is an issue around the bpf_prog refcounting when VSI is being\nrebuilt - since ice_prepare_xdp_rings() is called with vsi-\u003exdp_prog as\nan argument that is used later on by ice_vsi_assign_bpf_prog(), same\nbpf_prog pointers are swapped with each other. Then it is also\ninterpreted as an \u0027old_prog\u0027 which in turn causes us to call\nbpf_prog_put on it that will decrement its refcount.\n\nBelow splat can be interpreted in a way that due to zero refcount of a\nbpf_prog it is wiped out from the system while kernel still tries to\nrefer to it:\n\n[  481.069429] BUG: unable to handle page fault for address: ffffc9000640f038\n[  481.077390] #PF: supervisor read access in kernel mode\n[  481.083335] #PF: error_code(0x0000) - not-present page\n[  481.089276] PGD 100000067 P4D 100000067 PUD 1001cb067 PMD 106d2b067 PTE 0\n[  481.097141] Oops: 0000 [#1] PREEMPT SMP PTI\n[  481.101980] CPU: 12 PID: 3339 Comm: sudo Tainted: G           OE     5.15.0-rc5+ #1\n[  481.110840] Hardware name: Intel Corp. GRANTLEY/GRANTLEY, BIOS GRRFCRB1.86B.0276.D07.1605190235 05/19/2016\n[  481.122021] RIP: 0010:dev_xdp_prog_id+0x25/0x40\n[  481.127265] Code: 80 00 00 00 00 0f 1f 44 00 00 89 f6 48 c1 e6 04 48 01 fe 48 8b 86 98 08 00 00 48 85 c0 74 13 48 8b 50 18 31 c0 48 85 d2 74 07 \u003c48\u003e 8b 42 38 8b 40 20 c3 48 8b 96 90 08 00 00 eb e8 66 2e 0f 1f 84\n[  481.148991] RSP: 0018:ffffc90007b63868 EFLAGS: 00010286\n[  481.155034] RAX: 0000000000000000 RBX: ffff889080824000 RCX: 0000000000000000\n[  481.163278] RDX: ffffc9000640f000 RSI: ffff889080824010 RDI: ffff889080824000\n[  481.171527] RBP: ffff888107af7d00 R08: 0000000000000000 R09: ffff88810db5f6e0\n[  481.179776] R10: 0000000000000000 R11: ffff8890885b9988 R12: ffff88810db5f4bc\n[  481.188026] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\n[  481.196276] FS:  00007f5466d5bec0(0000) GS:ffff88903fb00000(0000) knlGS:0000000000000000\n[  481.205633] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[  481.212279] CR2: ffffc9000640f038 CR3: 000000014429c006 CR4: 00000000003706e0\n[  481.220530] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[  481.228771] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[  481.237029] Call Trace:\n[  481.239856]  rtnl_fill_ifinfo+0x768/0x12e0\n[  481.244602]  rtnl_dump_ifinfo+0x525/0x650\n[  481.249246]  ? __alloc_skb+0xa5/0x280\n[  481.253484]  netlink_dump+0x168/0x3c0\n[  481.257725]  netlink_recvmsg+0x21e/0x3e0\n[  481.262263]  ____sys_recvmsg+0x87/0x170\n[  481.266707]  ? __might_fault+0x20/0x30\n[  481.271046]  ? _copy_from_user+0x66/0xa0\n[  481.275591]  ? iovec_from_user+0xf6/0x1c0\n[  481.280226]  ___sys_recvmsg+0x82/0x100\n[  481.284566]  ? sock_sendmsg+0x5e/0x60\n[  481.288791]  ? __sys_sendto+0xee/0x150\n[  481.293129]  __sys_recvmsg+0x56/0xa0\n[  481.297267]  do_syscall_64+0x3b/0xc0\n[  481.301395]  entry_SYSCALL_64_after_hwframe+0x44/0xae\n[  481.307238] RIP: 0033:0x7f5466f39617\n[  481.311373] Code: 0c 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb bd 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2f 00 00 00 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10\n[  481.342944] RSP: 002b:00007ffedc7f4308 EFLAGS: 00000246 ORIG_RAX: 000000000000002f\n[  481.361783] RAX: ffffffffffffffda RBX: 00007ffedc7f5460 RCX: 00007f5466f39617\n[  481.380278] RDX: 0000000000000000 RSI: 00007ffedc7f5360 RDI: 0000000000000003\n[  481.398500] RBP: 00007ffedc7f53f0 R08: 0000000000000000 R09: 000055d556f04d50\n[  481.416463] R10: 0000000000000077 R11: 0000000000000246 R12: 00007ffedc7f5360\n[  481.434131] R13: 00007ffedc7f5350 R14: 00007ffedc7f5344 R15: 0000000000000e98\n[  481.451520] Modules linked in: ice\n---truncated---"
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: ice: evitar el subdesbordamiento de refcount de bpf_prog El controlador Ice tiene rutinas para administrar los recursos XDP que se comparten entre la operaci\u00f3n ndo_bpf y el flujo de reconstrucci\u00f3n VSI. Esto \u00faltimo ocurre, por ejemplo, cuando el usuario cambia el recuento de cola en una interfaz a trav\u00e9s de set_channels() de ethtool. Hay un problema relacionado con el recuento de bpf_prog cuando se reconstruye VSI: dado que se llama a ice_prepare_xdp_rings() con vsi-\u0026gt;xdp_prog como argumento que ice_vsi_assign_bpf_prog() usa m\u00e1s adelante, los mismos punteros de bpf_prog se intercambian entre s\u00ed. Luego tambi\u00e9n se interpreta como un \u0027old_prog\u0027 que a su vez hace que llamemos a bpf_prog_put, lo que disminuir\u00e1 su recuento. El siguiente s\u00edmbolo se puede interpretar de una manera que, debido al recuento cero de un bpf_prog, se elimina del sistema mientras el kernel todav\u00eda intenta hacer referencia a \u00e9l: [481.069429] ERROR: no se puede manejar el error de p\u00e1gina para la direcci\u00f3n: ffffc9000640f038 [481.077390] # PF: acceso de lectura de supervisor en modo kernel [ 481.083335] #PF: error_code(0x0000) - p\u00e1gina no presente [ 481.089276] PGD 100000067 P4D 100000067 PUD 1001cb067 PMD 106d2b067 PTE 0 [ 481.097141] : 0000 [#1] ANTICIPACI\u00d3N SMP PTI [ 481.101980] CPU: 12 PID: 3339 Comm: sudo Tainted: G OE 5.15.0-rc5+ #1 [ 481.110840] Nombre de hardware: Intel Corp. GRANTLEY/GRANTLEY, BIOS GRRFCRB1.86B.0276.D07.1605190235 19/05/2016 [ 481.122021] RIP: 0010:dev_xdp_prog_id+0x25/0x40 [ 481.127265] C\u00f3digo: 80 00 00 00 00 0f 1f 44 00 00 89 f6 48 c1 e6 04 48 01 fe 48 8b 86 98 08 00 00 48 85 c0 74 13 48 8b 50 18 31 c0 48 85 d2 74 07 \u0026lt;48\u0026gt; 8b 42 38 8b 40 20 c3 48 8b 96 90 08 00 00 eb e8 66 2e 0f 1f 84 [ 481.148991] RSP: ffffc90007b638 68 EFLAGS: 00010286 [481.155034] RAX: 0000000000000000 RBX: ffff889080824000 RCX: 0000000000000000 [ 481.163278] RDX: ffffc9000640f000 RSI: ffff889080824010 RDI: ffff889080824000 [ 481.171527] ffff888107af7d00 R08: 0000000000000000 R09: ffff88810db5f6e0 [ 481.179776] R10: 00000000000000000 R11: ffff8890885b9988 R12: ffff88810db5f4bc [ 481.188026] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 [ 481.196276] FS: 00007f5466d5bec0(0000) GS:ffff88903fb00000(0000) knlGS:0000000000000000 [ 48 1.205633] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 481.212279] CR2: ffffc9000640f038 CR3: 000000014429c006 CR4: 00000000003706e0 [ 481.220530] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 [ 481.228771] DR3: 00000000000000000 DR6: 00000000ffe0ff0 7: 0000000000000400 [481.237029] Seguimiento de llamadas: [481.239856] rtnl_fill_ifinfo+0x768/0x12e0 [481.244602] rtnl_dump_ifinfo+0x525/0x650 [481.249246] ? __alloc_skb+0xa5/0x280 [ 481.253484] netlink_dump+0x168/0x3c0 [ 481.257725] netlink_recvmsg+0x21e/0x3e0 [ 481.262263] ____sys_recvmsg+0x87/0x170 [ 481.2 66707] ? __might_fault+0x20/0x30 [ 481.271046] ? _copia_de_usuario+0x66/0xa0 [481.275591] ? iovec_from_user+0xf6/0x1c0 [ 481.280226] ___sys_recvmsg+0x82/0x100 [ 481.284566] ? sock_sendmsg+0x5e/0x60 [481.288791]? __sys_sendto+0xee/0x150 [ 481.293129] __sys_recvmsg+0x56/0xa0 [ 481.297267] do_syscall_64+0x3b/0xc0 [ 481.301395] Entry_SYSCALL_64_after_hwframe+0x44/0xae [ 481.307238] RIP: 0033:0x7f5466f39617 [ 481.311373] C\u00f3digo: 0c 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb bd 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2f 00 00 00 0f 05 \u0026lt;48\u0026gt; 3d 00 f0 ff ff 77 51 c3 48 83 ec 2 8 89 54 24 1c 48 89 74 24 10 [ 481.342944] RSP: 002b:00007ffedc7f4308 EFLAGS: 00000246 ORIG_RAX: 0000000000000002f [ 481.361783] RAX: ffffffffffffffda RBX: 00007ffedc7f5460 RCX: 00007f5466f39617 [ 481.380278] RDX: 0000000000000000 RSI: 00007ffedc7f5360 RDI: 000000000000003 [ 481.398500] R PA : 00007ffedc7f53f0 R08: 0000000000000000 R09: 000055d556f04d50 [ 481.416463] R10: 0000000000000077 R11: 0000000000000246 R12: ffedc7f5360 [ 481.434131] R13: 00007ffedc7f5350 R14: 00007ffedc7f5344 R15: 0000000000000e98 [ 481.451520] M\u00f3dulos vinculados en: ice ---truncado---"
          }
        ],
        "id": "CVE-2021-47563",
        "lastModified": "2026-06-17T04:17:46.530",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "type": "Secondary"
            }
          ],
          "ssvcV203": [
            {
              "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "ssvcData": {
                "id": "CVE-2021-47563",
                "options": [
                  {
                    "exploitation": "none"
                  },
                  {
                    "automatable": "no"
                  },
                  {
                    "technicalImpact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2024-05-29T16:50:07.805074Z",
                "version": "2.0.3"
              }
            }
          ]
        },
        "published": "2024-05-24T15:15:21.033",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
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        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
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            "description": [
              {
                "lang": "en",
                "value": "NVD-CWE-Other"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-03-22T18:28:05+00:00",
      "cve": "CVE-2021-47563",
      "id": "CVE-2021-47563",
      "initial_release_date": "2021-01-01T00:00:00+00:00",
      "product_status:known_affected": "76",
      "product_status:known_not_affected": "122",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ice: avoid bpf_prog refcount underflow",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-47563.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "important",
      "current_release_date": "2026-09-11T16:57:55Z",
      "cve": "CVE-2021-47563",
      "id": "CVE-2021-47563",
      "initial_release_date": "2024-05-28T15:29:19Z",
      "product_status:known_affected": "269",
      "product_status:known_not_affected": "195",
      "product_status:recommended": "587",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2021-47563",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2021-47563.json",
      "version": "60"
    },
    "vulnrichment": {
      "containers": {
        "adp": [
          {
            "providerMetadata": {
              "dateUpdated": "2024-08-04T05:39:59.865Z",
              "orgId": "af854a3a-2127-422b-91ae-364da2661108",
              "shortName": "CVE"
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            "references": [
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                "url": "https://git.kernel.org/stable/c/e65a8707b4cd756d26d246bb2b9fab06eebafac1"
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                "url": "https://git.kernel.org/stable/c/f65ee535df775a13a1046c0a0b2d72db342f8a5b"
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            ],
            "title": "CVE Program Container"
          },
          {
            "metrics": [
              {
                "cvssV3_1": {
                  "attackComplexity": "LOW",
                  "attackVector": "LOCAL",
                  "availabilityImpact": "HIGH",
                  "baseScore": 5.5,
                  "baseSeverity": "MEDIUM",
                  "confidentialityImpact": "NONE",
                  "integrityImpact": "NONE",
                  "privilegesRequired": "LOW",
                  "scope": "UNCHANGED",
                  "userInteraction": "NONE",
                  "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                  "version": "3.1"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2021-47563",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2024-05-29T16:50:07.805074Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
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            "problemTypes": [
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                "descriptions": [
                  {
                    "description": "CWE-noinfo Not enough information",
                    "lang": "en",
                    "type": "CWE"
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                ]
              }
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            "providerMetadata": {
              "dateUpdated": "2024-05-29T16:03:28.946Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
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        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "drivers/net/ethernet/intel/ice/ice_main.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "e65a8707b4cd",
                  "status": "affected",
                  "version": "efc2214b6047",
                  "versionType": "git"
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                {
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                  "status": "affected",
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              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "5.5"
                },
                {
                  "lessThan": "5.5",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.83",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.6",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "5.16",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nice: avoid bpf_prog refcount underflow\n\nIce driver has the routines for managing XDP resources that are shared\nbetween ndo_bpf op and VSI rebuild flow. The latter takes place for\nexample when user changes queue count on an interface via ethtool\u0027s\nset_channels().\n\nThere is an issue around the bpf_prog refcounting when VSI is being\nrebuilt - since ice_prepare_xdp_rings() is called with vsi-\u003exdp_prog as\nan argument that is used later on by ice_vsi_assign_bpf_prog(), same\nbpf_prog pointers are swapped with each other. Then it is also\ninterpreted as an \u0027old_prog\u0027 which in turn causes us to call\nbpf_prog_put on it that will decrement its refcount.\n\nBelow splat can be interpreted in a way that due to zero refcount of a\nbpf_prog it is wiped out from the system while kernel still tries to\nrefer to it:\n\n[  481.069429] BUG: unable to handle page fault for address: ffffc9000640f038\n[  481.077390] #PF: supervisor read access in kernel mode\n[  481.083335] #PF: error_code(0x0000) - not-present page\n[  481.089276] PGD 100000067 P4D 100000067 PUD 1001cb067 PMD 106d2b067 PTE 0\n[  481.097141] Oops: 0000 [#1] PREEMPT SMP PTI\n[  481.101980] CPU: 12 PID: 3339 Comm: sudo Tainted: G           OE     5.15.0-rc5+ #1\n[  481.110840] Hardware name: Intel Corp. GRANTLEY/GRANTLEY, BIOS GRRFCRB1.86B.0276.D07.1605190235 05/19/2016\n[  481.122021] RIP: 0010:dev_xdp_prog_id+0x25/0x40\n[  481.127265] Code: 80 00 00 00 00 0f 1f 44 00 00 89 f6 48 c1 e6 04 48 01 fe 48 8b 86 98 08 00 00 48 85 c0 74 13 48 8b 50 18 31 c0 48 85 d2 74 07 \u003c48\u003e 8b 42 38 8b 40 20 c3 48 8b 96 90 08 00 00 eb e8 66 2e 0f 1f 84\n[  481.148991] RSP: 0018:ffffc90007b63868 EFLAGS: 00010286\n[  481.155034] RAX: 0000000000000000 RBX: ffff889080824000 RCX: 0000000000000000\n[  481.163278] RDX: ffffc9000640f000 RSI: ffff889080824010 RDI: ffff889080824000\n[  481.171527] RBP: ffff888107af7d00 R08: 0000000000000000 R09: ffff88810db5f6e0\n[  481.179776] R10: 0000000000000000 R11: ffff8890885b9988 R12: ffff88810db5f4bc\n[  481.188026] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000\n[  481.196276] FS:  00007f5466d5bec0(0000) GS:ffff88903fb00000(0000) knlGS:0000000000000000\n[  481.205633] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n[  481.212279] CR2: ffffc9000640f038 CR3: 000000014429c006 CR4: 00000000003706e0\n[  481.220530] DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n[  481.228771] DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n[  481.237029] Call Trace:\n[  481.239856]  rtnl_fill_ifinfo+0x768/0x12e0\n[  481.244602]  rtnl_dump_ifinfo+0x525/0x650\n[  481.249246]  ? __alloc_skb+0xa5/0x280\n[  481.253484]  netlink_dump+0x168/0x3c0\n[  481.257725]  netlink_recvmsg+0x21e/0x3e0\n[  481.262263]  ____sys_recvmsg+0x87/0x170\n[  481.266707]  ? __might_fault+0x20/0x30\n[  481.271046]  ? _copy_from_user+0x66/0xa0\n[  481.275591]  ? iovec_from_user+0xf6/0x1c0\n[  481.280226]  ___sys_recvmsg+0x82/0x100\n[  481.284566]  ? sock_sendmsg+0x5e/0x60\n[  481.288791]  ? __sys_sendto+0xee/0x150\n[  481.293129]  __sys_recvmsg+0x56/0xa0\n[  481.297267]  do_syscall_64+0x3b/0xc0\n[  481.301395]  entry_SYSCALL_64_after_hwframe+0x44/0xae\n[  481.307238] RIP: 0033:0x7f5466f39617\n[  481.311373] Code: 0c 00 f7 d8 64 89 02 48 c7 c0 ff ff ff ff eb bd 0f 1f 00 f3 0f 1e fa 64 8b 04 25 18 00 00 00 85 c0 75 10 b8 2f 00 00 00 0f 05 \u003c48\u003e 3d 00 f0 ff ff 77 51 c3 48 83 ec 28 89 54 24 1c 48 89 74 24 10\n[  481.342944] RSP: 002b:00007ffedc7f4308 EFLAGS: 00000246 ORIG_RAX: 000000000000002f\n[  481.361783] RAX: ffffffffffffffda RBX: 00007ffedc7f5460 RCX: 00007f5466f39617\n[  481.380278] RDX: 0000000000000000 RSI: 00007ffedc7f5360 RDI: 0000000000000003\n[  481.398500] RBP: 00007ffedc7f53f0 R08: 0000000000000000 R09: 000055d556f04d50\n[  481.416463] R10: 0000000000000077 R11: 0000000000000246 R12: 00007ffedc7f5360\n[  481.434131] R13: 00007ffedc7f5350 R14: 00007ffedc7f5344 R15: 0000000000000e98\n[  481.451520] Modules linked in: ice\n---truncated---"
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2024-11-04T12:08:17.960Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/e65a8707b4cd756d26d246bb2b9fab06eebafac1"
            },
            {
              "url": "https://git.kernel.org/stable/c/1f10b09ccc832698ef4624a6ab9a213b6ccbda76"
            },
            {
              "url": "https://git.kernel.org/stable/c/f65ee535df775a13a1046c0a0b2d72db342f8a5b"
            }
          ],
          "title": "ice: avoid bpf_prog refcount underflow",
          "x_generator": {
            "engine": "bippy-9e1c9544281a"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2021-47563",
        "datePublished": "2024-05-24T15:12:51.398Z",
        "dateReserved": "2024-05-24T15:11:00.728Z",
        "dateUpdated": "2024-11-05T16:52:12.886Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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