Vulnerability-Lookup

GHSA-F2CP-W9WF-8V89

Vulnerability from github – Published: 2025-01-11 15:30 – Updated: 2025-09-23 15:31

Details

In the Linux kernel, the following vulnerability has been resolved:

net: tun: fix tun_napi_alloc_frags()

syzbot reported the following crash [1]

Issue came with the blamed commit. Instead of going through all the iov components, we keep using the first one and end up with a malformed skb.

[1]

kernel BUG at net/core/skbuff.c:2849 ! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 0 UID: 0 PID: 6230 Comm: syz-executor132 Not tainted 6.13.0-rc1-syzkaller-00407-g96b6fcc0ee41 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 RIP: 0010:__pskb_pull_tail+0x1568/0x1570 net/core/skbuff.c:2848 Code: 38 c1 0f 8c 32 f1 ff ff 4c 89 f7 e8 92 96 74 f8 e9 25 f1 ff ff e8 e8 ae 09 f8 48 8b 5c 24 08 e9 eb fb ff ff e8 d9 ae 09 f8 90 <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90004cbef30 EFLAGS: 00010293 RAX: ffffffff8995c347 RBX: 00000000fffffff2 RCX: ffff88802cf45a00 RDX: 0000000000000000 RSI: 00000000fffffff2 RDI: 0000000000000000 RBP: ffff88807df0c06a R08: ffffffff8995b084 R09: 1ffff1100fbe185c R10: dffffc0000000000 R11: ffffed100fbe185d R12: ffff888076e85d50 R13: ffff888076e85c80 R14: ffff888076e85cf4 R15: ffff888076e85c80 FS: 00007f0dca6ea6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0dca6ead58 CR3: 00000000119da000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_cow_data+0x2da/0xcb0 net/core/skbuff.c:5284 tipc_aead_decrypt net/tipc/crypto.c:894 [inline] tipc_crypto_rcv+0x402/0x24e0 net/tipc/crypto.c:1844 tipc_rcv+0x57e/0x12a0 net/tipc/node.c:2109 tipc_l2_rcv_msg+0x2bd/0x450 net/tipc/bearer.c:668 __netif_receive_skb_list_ptype net/core/dev.c:5720 [inline] __netif_receive_skb_list_core+0x8b7/0x980 net/core/dev.c:5762 __netif_receive_skb_list net/core/dev.c:5814 [inline] netif_receive_skb_list_internal+0xa51/0xe30 net/core/dev.c:5905 gro_normal_list include/net/gro.h:515 [inline] napi_complete_done+0x2b5/0x870 net/core/dev.c:6256 napi_complete include/linux/netdevice.h:567 [inline] tun_get_user+0x2ea0/0x4890 drivers/net/tun.c:1982 tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2057 do_iter_readv_writev+0x600/0x880 vfs_writev+0x376/0xba0 fs/read_write.c:1050 do_writev+0x1b6/0x360 fs/read_write.c:1096 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Severity

5.5 (Medium)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2024-56372"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-01-11T13:15:28Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: tun: fix tun_napi_alloc_frags()\n\nsyzbot reported the following crash [1]\n\nIssue came with the blamed commit. Instead of going through\nall the iov components, we keep using the first one\nand end up with a malformed skb.\n\n[1]\n\nkernel BUG at net/core/skbuff.c:2849 !\nOops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI\nCPU: 0 UID: 0 PID: 6230 Comm: syz-executor132 Not tainted 6.13.0-rc1-syzkaller-00407-g96b6fcc0ee41 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024\n RIP: 0010:__pskb_pull_tail+0x1568/0x1570 net/core/skbuff.c:2848\nCode: 38 c1 0f 8c 32 f1 ff ff 4c 89 f7 e8 92 96 74 f8 e9 25 f1 ff ff e8 e8 ae 09 f8 48 8b 5c 24 08 e9 eb fb ff ff e8 d9 ae 09 f8 90 \u003c0f\u003e 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90\nRSP: 0018:ffffc90004cbef30 EFLAGS: 00010293\nRAX: ffffffff8995c347 RBX: 00000000fffffff2 RCX: ffff88802cf45a00\nRDX: 0000000000000000 RSI: 00000000fffffff2 RDI: 0000000000000000\nRBP: ffff88807df0c06a R08: ffffffff8995b084 R09: 1ffff1100fbe185c\nR10: dffffc0000000000 R11: ffffed100fbe185d R12: ffff888076e85d50\nR13: ffff888076e85c80 R14: ffff888076e85cf4 R15: ffff888076e85c80\nFS:  00007f0dca6ea6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f0dca6ead58 CR3: 00000000119da000 CR4: 00000000003526f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \u003cTASK\u003e\n  skb_cow_data+0x2da/0xcb0 net/core/skbuff.c:5284\n  tipc_aead_decrypt net/tipc/crypto.c:894 [inline]\n  tipc_crypto_rcv+0x402/0x24e0 net/tipc/crypto.c:1844\n  tipc_rcv+0x57e/0x12a0 net/tipc/node.c:2109\n  tipc_l2_rcv_msg+0x2bd/0x450 net/tipc/bearer.c:668\n  __netif_receive_skb_list_ptype net/core/dev.c:5720 [inline]\n  __netif_receive_skb_list_core+0x8b7/0x980 net/core/dev.c:5762\n  __netif_receive_skb_list net/core/dev.c:5814 [inline]\n  netif_receive_skb_list_internal+0xa51/0xe30 net/core/dev.c:5905\n  gro_normal_list include/net/gro.h:515 [inline]\n  napi_complete_done+0x2b5/0x870 net/core/dev.c:6256\n  napi_complete include/linux/netdevice.h:567 [inline]\n  tun_get_user+0x2ea0/0x4890 drivers/net/tun.c:1982\n  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2057\n do_iter_readv_writev+0x600/0x880\n  vfs_writev+0x376/0xba0 fs/read_write.c:1050\n  do_writev+0x1b6/0x360 fs/read_write.c:1096\n  do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f",
  "id": "GHSA-f2cp-w9wf-8v89",
  "modified": "2025-09-23T15:31:07Z",
  "published": "2025-01-11T15:30:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2024-56372"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/429fde2d81bcef0ebab002215358955704586457"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4f393ea1e2f9c3b646d00572dd92c48b1869c65f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/efe74dd58a72bd987b158142c904b7ef2ad132e2"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2024-56372 (GCVE-0-2024-56372)

Vulnerability from cvelistv5 – Published: 2025-01-11 12:35 – Updated: 2026-05-11 20:54

Title

net: tun: fix tun_napi_alloc_frags()

Summary

In the Linux kernel, the following vulnerability has been resolved: net: tun: fix tun_napi_alloc_frags() syzbot reported the following crash [1] Issue came with the blamed commit. Instead of going through all the iov components, we keep using the first one and end up with a malformed skb. [1] kernel BUG at net/core/skbuff.c:2849 ! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI CPU: 0 UID: 0 PID: 6230 Comm: syz-executor132 Not tainted 6.13.0-rc1-syzkaller-00407-g96b6fcc0ee41 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 RIP: 0010:__pskb_pull_tail+0x1568/0x1570 net/core/skbuff.c:2848 Code: 38 c1 0f 8c 32 f1 ff ff 4c 89 f7 e8 92 96 74 f8 e9 25 f1 ff ff e8 e8 ae 09 f8 48 8b 5c 24 08 e9 eb fb ff ff e8 d9 ae 09 f8 90 <0f> 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 0018:ffffc90004cbef30 EFLAGS: 00010293 RAX: ffffffff8995c347 RBX: 00000000fffffff2 RCX: ffff88802cf45a00 RDX: 0000000000000000 RSI: 00000000fffffff2 RDI: 0000000000000000 RBP: ffff88807df0c06a R08: ffffffff8995b084 R09: 1ffff1100fbe185c R10: dffffc0000000000 R11: ffffed100fbe185d R12: ffff888076e85d50 R13: ffff888076e85c80 R14: ffff888076e85cf4 R15: ffff888076e85c80 FS: 00007f0dca6ea6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0dca6ead58 CR3: 00000000119da000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> skb_cow_data+0x2da/0xcb0 net/core/skbuff.c:5284 tipc_aead_decrypt net/tipc/crypto.c:894 [inline] tipc_crypto_rcv+0x402/0x24e0 net/tipc/crypto.c:1844 tipc_rcv+0x57e/0x12a0 net/tipc/node.c:2109 tipc_l2_rcv_msg+0x2bd/0x450 net/tipc/bearer.c:668 __netif_receive_skb_list_ptype net/core/dev.c:5720 [inline] __netif_receive_skb_list_core+0x8b7/0x980 net/core/dev.c:5762 __netif_receive_skb_list net/core/dev.c:5814 [inline] netif_receive_skb_list_internal+0xa51/0xe30 net/core/dev.c:5905 gro_normal_list include/net/gro.h:515 [inline] napi_complete_done+0x2b5/0x870 net/core/dev.c:6256 napi_complete include/linux/netdevice.h:567 [inline] tun_get_user+0x2ea0/0x4890 drivers/net/tun.c:1982 tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2057 do_iter_readv_writev+0x600/0x880 vfs_writev+0x376/0xba0 fs/read_write.c:1050 do_writev+0x1b6/0x360 fs/read_write.c:1096 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Severity

No CVSS data available.

Assigner

Linux mitre root

References

3 references

URL	Tags
https://git.kernel.org/stable/c/efe74dd58a72bd987…
https://git.kernel.org/stable/c/4f393ea1e2f9c3b64…
https://git.kernel.org/stable/c/429fde2d81bcef0eb…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: de4f5fed3f231a8ff4790bf52975f847b95b85ea , < efe74dd58a72bd987b158142c904b7ef2ad132e2 (git) Affected: de4f5fed3f231a8ff4790bf52975f847b95b85ea , < 4f393ea1e2f9c3b646d00572dd92c48b1869c65f (git) Affected: de4f5fed3f231a8ff4790bf52975f847b95b85ea , < 429fde2d81bcef0ebab002215358955704586457 (git)
Linux	Linux	Affected: 6.4 Unaffected: 0 , < 6.4 (semver) Unaffected: 6.6.68 , ≤ 6.6.* (semver) Unaffected: 6.12.7 , ≤ 6.12.* (semver) Unaffected: 6.13 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/tun.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "efe74dd58a72bd987b158142c904b7ef2ad132e2",
              "status": "affected",
              "version": "de4f5fed3f231a8ff4790bf52975f847b95b85ea",
              "versionType": "git"
            },
            {
              "lessThan": "4f393ea1e2f9c3b646d00572dd92c48b1869c65f",
              "status": "affected",
              "version": "de4f5fed3f231a8ff4790bf52975f847b95b85ea",
              "versionType": "git"
            },
            {
              "lessThan": "429fde2d81bcef0ebab002215358955704586457",
              "status": "affected",
              "version": "de4f5fed3f231a8ff4790bf52975f847b95b85ea",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/tun.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
              "lessThan": "6.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.68",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.13",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.68",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.7",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.13",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: tun: fix tun_napi_alloc_frags()\n\nsyzbot reported the following crash [1]\n\nIssue came with the blamed commit. Instead of going through\nall the iov components, we keep using the first one\nand end up with a malformed skb.\n\n[1]\n\nkernel BUG at net/core/skbuff.c:2849 !\nOops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI\nCPU: 0 UID: 0 PID: 6230 Comm: syz-executor132 Not tainted 6.13.0-rc1-syzkaller-00407-g96b6fcc0ee41 #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024\n RIP: 0010:__pskb_pull_tail+0x1568/0x1570 net/core/skbuff.c:2848\nCode: 38 c1 0f 8c 32 f1 ff ff 4c 89 f7 e8 92 96 74 f8 e9 25 f1 ff ff e8 e8 ae 09 f8 48 8b 5c 24 08 e9 eb fb ff ff e8 d9 ae 09 f8 90 \u003c0f\u003e 0b 66 0f 1f 44 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90\nRSP: 0018:ffffc90004cbef30 EFLAGS: 00010293\nRAX: ffffffff8995c347 RBX: 00000000fffffff2 RCX: ffff88802cf45a00\nRDX: 0000000000000000 RSI: 00000000fffffff2 RDI: 0000000000000000\nRBP: ffff88807df0c06a R08: ffffffff8995b084 R09: 1ffff1100fbe185c\nR10: dffffc0000000000 R11: ffffed100fbe185d R12: ffff888076e85d50\nR13: ffff888076e85c80 R14: ffff888076e85cf4 R15: ffff888076e85c80\nFS:  00007f0dca6ea6c0(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 00007f0dca6ead58 CR3: 00000000119da000 CR4: 00000000003526f0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \u003cTASK\u003e\n  skb_cow_data+0x2da/0xcb0 net/core/skbuff.c:5284\n  tipc_aead_decrypt net/tipc/crypto.c:894 [inline]\n  tipc_crypto_rcv+0x402/0x24e0 net/tipc/crypto.c:1844\n  tipc_rcv+0x57e/0x12a0 net/tipc/node.c:2109\n  tipc_l2_rcv_msg+0x2bd/0x450 net/tipc/bearer.c:668\n  __netif_receive_skb_list_ptype net/core/dev.c:5720 [inline]\n  __netif_receive_skb_list_core+0x8b7/0x980 net/core/dev.c:5762\n  __netif_receive_skb_list net/core/dev.c:5814 [inline]\n  netif_receive_skb_list_internal+0xa51/0xe30 net/core/dev.c:5905\n  gro_normal_list include/net/gro.h:515 [inline]\n  napi_complete_done+0x2b5/0x870 net/core/dev.c:6256\n  napi_complete include/linux/netdevice.h:567 [inline]\n  tun_get_user+0x2ea0/0x4890 drivers/net/tun.c:1982\n  tun_chr_write_iter+0x10d/0x1f0 drivers/net/tun.c:2057\n do_iter_readv_writev+0x600/0x880\n  vfs_writev+0x376/0xba0 fs/read_write.c:1050\n  do_writev+0x1b6/0x360 fs/read_write.c:1096\n  do_syscall_x64 arch/x86/entry/common.c:52 [inline]\n  do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83\n entry_SYSCALL_64_after_hwframe+0x77/0x7f"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T20:54:00.801Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/efe74dd58a72bd987b158142c904b7ef2ad132e2"
        },
        {
          "url": "https://git.kernel.org/stable/c/4f393ea1e2f9c3b646d00572dd92c48b1869c65f"
        },
        {
          "url": "https://git.kernel.org/stable/c/429fde2d81bcef0ebab002215358955704586457"
        }
      ],
      "title": "net: tun: fix tun_napi_alloc_frags()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2024-56372",
    "datePublished": "2025-01-11T12:35:47.256Z",
    "dateReserved": "2025-01-11T12:34:02.635Z",
    "dateUpdated": "2026-05-11T20:54:00.801Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.