GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

CVE-2023-53198 (GCVE-0-2023-53198)

Vulnerability from cvelistv5 – Published: 2025-09-15 14:06 – Updated: 2026-05-23 15:28
VLAI
Title
raw: Fix NULL deref in raw_get_next().
Summary
In the Linux kernel, the following vulnerability has been resolved: raw: Fix NULL deref in raw_get_next(). Dae R. Jeong reported a NULL deref in raw_get_next() [0]. It seems that the repro was running these sequences in parallel so that one thread was iterating on a socket that was being freed in another netns. unshare(0x40060200) r0 = syz_open_procfs(0x0, &(0x7f0000002080)='net/raw\x00') socket$inet_icmp_raw(0x2, 0x3, 0x1) pread64(r0, &(0x7f0000000000)=""/10, 0xa, 0x10000000007f) After commit 0daf07e52709 ("raw: convert raw sockets to RCU"), we use RCU and hlist_nulls_for_each_entry() to iterate over SOCK_RAW sockets. However, we should use spinlock for slow paths to avoid the NULL deref. Also, SOCK_RAW does not use SLAB_TYPESAFE_BY_RCU, and the slab object is not reused during iteration in the grace period. In fact, the lockless readers do not check the nulls marker with get_nulls_value(). So, SOCK_RAW should use hlist instead of hlist_nulls. Instead of adding an unnecessary barrier by sk_nulls_for_each_rcu(), let's convert hlist_nulls to hlist and use sk_for_each_rcu() for fast paths and sk_for_each() and spinlock for /proc/net/raw. [0]: general protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f] CPU: 2 PID: 20952 Comm: syz-executor.0 Not tainted 6.2.0-g048ec869bafd-dirty #7 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014 RIP: 0010:read_pnet include/net/net_namespace.h:383 [inline] RIP: 0010:sock_net include/net/sock.h:649 [inline] RIP: 0010:raw_get_next net/ipv4/raw.c:974 [inline] RIP: 0010:raw_get_idx net/ipv4/raw.c:986 [inline] RIP: 0010:raw_seq_start+0x431/0x800 net/ipv4/raw.c:995 Code: ef e8 33 3d 94 f7 49 8b 6d 00 4c 89 ef e8 b7 65 5f f7 49 89 ed 49 83 c5 98 0f 84 9a 00 00 00 48 83 c5 c8 48 89 e8 48 c1 e8 03 <42> 80 3c 30 00 74 08 48 89 ef e8 00 3d 94 f7 4c 8b 7d 00 48 89 ef RSP: 0018:ffffc9001154f9b0 EFLAGS: 00010206 RAX: 0000000000000005 RBX: 1ffff1100302c8fd RCX: 0000000000000000 RDX: 0000000000000028 RSI: ffffc9001154f988 RDI: ffffc9000f77a338 RBP: 0000000000000029 R08: ffffffff8a50ffb4 R09: fffffbfff24b6bd9 R10: fffffbfff24b6bd9 R11: 0000000000000000 R12: ffff88801db73b78 R13: fffffffffffffff9 R14: dffffc0000000000 R15: 0000000000000030 FS: 00007f843ae8e700(0000) GS:ffff888063700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055bb9614b35f CR3: 000000003c672000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> seq_read_iter+0x4c6/0x10f0 fs/seq_file.c:225 seq_read+0x224/0x320 fs/seq_file.c:162 pde_read fs/proc/inode.c:316 [inline] proc_reg_read+0x23f/0x330 fs/proc/inode.c:328 vfs_read+0x31e/0xd30 fs/read_write.c:468 ksys_pread64 fs/read_write.c:665 [inline] __do_sys_pread64 fs/read_write.c:675 [inline] __se_sys_pread64 fs/read_write.c:672 [inline] __x64_sys_pread64+0x1e9/0x280 fs/read_write.c:672 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4e/0xa0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x478d29 Code: f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f843ae8dbe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000011 RAX: ffffffffffffffda RBX: 0000000000791408 RCX: 0000000000478d29 RDX: 000000000000000a RSI: 0000000020000000 RDI: 0000000000000003 RBP: 00000000f477909a R08: 0000000000000000 R09: 0000000000000000 R10: 000010000000007f R11: 0000000000000246 R12: 0000000000791740 R13: 0000000000791414 R14: 0000000000791408 R15: 00007ffc2eb48a50 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010 ---truncated---
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 0daf07e527095e64ee8927ce297ab626643e9f51 , < b34056bedf04d08ef24f713a7f93bad1274a838d (git)
Affected: 0daf07e527095e64ee8927ce297ab626643e9f51 , < 67daeaecd70ef20ab540c21739d3f633734967a1 (git)
Affected: 0daf07e527095e64ee8927ce297ab626643e9f51 , < 0a78cf7264d29abeca098eae0b188a10aabc8a32 (git)
Affected: 648067dd541591a0ddaa31afaaf4a7655d33c0d8 (git)
Affected: 04309b5f5d8dd77996b19ae6be8f42f9fc1679a0 (git)
Affected: 5.18.18 , < 5.19 (semver)
Affected: 5.19.2 , < 5.20 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.1.24 , ≤ 6.1.* (semver)
Unaffected: 6.2.11 , ≤ 6.2.* (semver)
Unaffected: 6.3 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "include/net/raw.h",
            "net/ipv4/raw.c",
            "net/ipv4/raw_diag.c",
            "net/ipv6/raw.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "b34056bedf04d08ef24f713a7f93bad1274a838d",
              "status": "affected",
              "version": "0daf07e527095e64ee8927ce297ab626643e9f51",
              "versionType": "git"
            },
            {
              "lessThan": "67daeaecd70ef20ab540c21739d3f633734967a1",
              "status": "affected",
              "version": "0daf07e527095e64ee8927ce297ab626643e9f51",
              "versionType": "git"
            },
            {
              "lessThan": "0a78cf7264d29abeca098eae0b188a10aabc8a32",
              "status": "affected",
              "version": "0daf07e527095e64ee8927ce297ab626643e9f51",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "648067dd541591a0ddaa31afaaf4a7655d33c0d8",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "04309b5f5d8dd77996b19ae6be8f42f9fc1679a0",
              "versionType": "git"
            },
            {
              "lessThan": "5.19",
              "status": "affected",
              "version": "5.18.18",
              "versionType": "semver"
            },
            {
              "lessThan": "5.20",
              "status": "affected",
              "version": "5.19.2",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "include/net/raw.h",
            "net/ipv4/raw.c",
            "net/ipv4/raw_diag.c",
            "net/ipv6/raw.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.0"
            },
            {
              "lessThan": "6.0",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.24",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.2.*",
              "status": "unaffected",
              "version": "6.2.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.24",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.2.11",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.3",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.18.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.19.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nraw: Fix NULL deref in raw_get_next().\n\nDae R. Jeong reported a NULL deref in raw_get_next() [0].\n\nIt seems that the repro was running these sequences in parallel so\nthat one thread was iterating on a socket that was being freed in\nanother netns.\n\n  unshare(0x40060200)\n  r0 = syz_open_procfs(0x0, \u0026(0x7f0000002080)=\u0027net/raw\\x00\u0027)\n  socket$inet_icmp_raw(0x2, 0x3, 0x1)\n  pread64(r0, \u0026(0x7f0000000000)=\"\"/10, 0xa, 0x10000000007f)\n\nAfter commit 0daf07e52709 (\"raw: convert raw sockets to RCU\"), we\nuse RCU and hlist_nulls_for_each_entry() to iterate over SOCK_RAW\nsockets.  However, we should use spinlock for slow paths to avoid\nthe NULL deref.\n\nAlso, SOCK_RAW does not use SLAB_TYPESAFE_BY_RCU, and the slab object\nis not reused during iteration in the grace period.  In fact, the\nlockless readers do not check the nulls marker with get_nulls_value().\nSo, SOCK_RAW should use hlist instead of hlist_nulls.\n\nInstead of adding an unnecessary barrier by sk_nulls_for_each_rcu(),\nlet\u0027s convert hlist_nulls to hlist and use sk_for_each_rcu() for\nfast paths and sk_for_each() and spinlock for /proc/net/raw.\n\n[0]:\ngeneral protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] PREEMPT SMP KASAN\nKASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]\nCPU: 2 PID: 20952 Comm: syz-executor.0 Not tainted 6.2.0-g048ec869bafd-dirty #7\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014\nRIP: 0010:read_pnet include/net/net_namespace.h:383 [inline]\nRIP: 0010:sock_net include/net/sock.h:649 [inline]\nRIP: 0010:raw_get_next net/ipv4/raw.c:974 [inline]\nRIP: 0010:raw_get_idx net/ipv4/raw.c:986 [inline]\nRIP: 0010:raw_seq_start+0x431/0x800 net/ipv4/raw.c:995\nCode: ef e8 33 3d 94 f7 49 8b 6d 00 4c 89 ef e8 b7 65 5f f7 49 89 ed 49 83 c5 98 0f 84 9a 00 00 00 48 83 c5 c8 48 89 e8 48 c1 e8 03 \u003c42\u003e 80 3c 30 00 74 08 48 89 ef e8 00 3d 94 f7 4c 8b 7d 00 48 89 ef\nRSP: 0018:ffffc9001154f9b0 EFLAGS: 00010206\nRAX: 0000000000000005 RBX: 1ffff1100302c8fd RCX: 0000000000000000\nRDX: 0000000000000028 RSI: ffffc9001154f988 RDI: ffffc9000f77a338\nRBP: 0000000000000029 R08: ffffffff8a50ffb4 R09: fffffbfff24b6bd9\nR10: fffffbfff24b6bd9 R11: 0000000000000000 R12: ffff88801db73b78\nR13: fffffffffffffff9 R14: dffffc0000000000 R15: 0000000000000030\nFS:  00007f843ae8e700(0000) GS:ffff888063700000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 000055bb9614b35f CR3: 000000003c672000 CR4: 00000000003506e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \u003cTASK\u003e\n seq_read_iter+0x4c6/0x10f0 fs/seq_file.c:225\n seq_read+0x224/0x320 fs/seq_file.c:162\n pde_read fs/proc/inode.c:316 [inline]\n proc_reg_read+0x23f/0x330 fs/proc/inode.c:328\n vfs_read+0x31e/0xd30 fs/read_write.c:468\n ksys_pread64 fs/read_write.c:665 [inline]\n __do_sys_pread64 fs/read_write.c:675 [inline]\n __se_sys_pread64 fs/read_write.c:672 [inline]\n __x64_sys_pread64+0x1e9/0x280 fs/read_write.c:672\n do_syscall_x64 arch/x86/entry/common.c:51 [inline]\n do_syscall_64+0x4e/0xa0 arch/x86/entry/common.c:82\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\nRIP: 0033:0x478d29\nCode: f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007f843ae8dbe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000011\nRAX: ffffffffffffffda RBX: 0000000000791408 RCX: 0000000000478d29\nRDX: 000000000000000a RSI: 0000000020000000 RDI: 0000000000000003\nRBP: 00000000f477909a R08: 0000000000000000 R09: 0000000000000000\nR10: 000010000000007f R11: 0000000000000246 R12: 0000000000791740\nR13: 0000000000791414 R14: 0000000000791408 R15: 00007ffc2eb48a50\n \u003c/TASK\u003e\nModules linked in:\n---[ end trace 0000000000000000 ]---\nRIP: 0010\n---truncated---"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-23T15:28:13.609Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b34056bedf04d08ef24f713a7f93bad1274a838d"
        },
        {
          "url": "https://git.kernel.org/stable/c/67daeaecd70ef20ab540c21739d3f633734967a1"
        },
        {
          "url": "https://git.kernel.org/stable/c/0a78cf7264d29abeca098eae0b188a10aabc8a32"
        }
      ],
      "title": "raw: Fix NULL deref in raw_get_next().",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2023-53198",
    "datePublished": "2025-09-15T14:06:47.761Z",
    "dateReserved": "2025-09-15T13:59:19.067Z",
    "dateUpdated": "2026-05-23T15:28:13.609Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2023-53198",
      "date": "2026-09-18",
      "epss": "0.00154",
      "percentile": "0.04905"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "include/net/raw.h",
                  "net/ipv4/raw.c",
                  "net/ipv4/raw_diag.c",
                  "net/ipv6/raw.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "b34056bedf04d08ef24f713a7f93bad1274a838d",
                    "status": "affected",
                    "version": "0daf07e527095e64ee8927ce297ab626643e9f51",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "67daeaecd70ef20ab540c21739d3f633734967a1",
                    "status": "affected",
                    "version": "0daf07e527095e64ee8927ce297ab626643e9f51",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "0a78cf7264d29abeca098eae0b188a10aabc8a32",
                    "status": "affected",
                    "version": "0daf07e527095e64ee8927ce297ab626643e9f51",
                    "versionType": "git"
                  },
                  {
                    "status": "affected",
                    "version": "648067dd541591a0ddaa31afaaf4a7655d33c0d8",
                    "versionType": "git"
                  },
                  {
                    "status": "affected",
                    "version": "04309b5f5d8dd77996b19ae6be8f42f9fc1679a0",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "5.19",
                    "status": "affected",
                    "version": "5.18.18",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "5.20",
                    "status": "affected",
                    "version": "5.19.2",
                    "versionType": "semver"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "include/net/raw.h",
                  "net/ipv4/raw.c",
                  "net/ipv4/raw_diag.c",
                  "net/ipv6/raw.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "6.0"
                  },
                  {
                    "lessThan": "6.0",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.24",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.2.*",
                    "status": "unaffected",
                    "version": "6.2.11",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "6.3",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "B60CAFE2-08C3-461B-B5F8-25BEB0C9853E",
                    "versionEndExcluding": "5.19",
                    "versionStartIncluding": "5.18.18",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "DF529B80-4416-4DA9-A52D-58FA3CEE47B0",
                    "versionEndExcluding": "6.1.24",
                    "versionStartIncluding": "5.19.2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "93C03C9A-798F-4CD5-912F-A436BFA0CC7E",
                    "versionEndExcluding": "6.2.11",
                    "versionStartIncluding": "6.2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.3:rc1:*:*:*:*:*:*",
                    "matchCriteriaId": "B8E3B0E8-FA27-4305-87BB-AF6C25B160CB",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.3:rc2:*:*:*:*:*:*",
                    "matchCriteriaId": "A47F0FC3-CE52-4BA1-BA51-22F783938431",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.3:rc3:*:*:*:*:*:*",
                    "matchCriteriaId": "3583026A-27EC-4A4C-850A-83F2AF970673",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.3:rc4:*:*:*:*:*:*",
                    "matchCriteriaId": "DC271202-7570-4505-89A4-D602D47BFD00",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.3:rc5:*:*:*:*:*:*",
                    "matchCriteriaId": "D413BB6D-4F74-4C7D-9163-47786619EF53",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nraw: Fix NULL deref in raw_get_next().\n\nDae R. Jeong reported a NULL deref in raw_get_next() [0].\n\nIt seems that the repro was running these sequences in parallel so\nthat one thread was iterating on a socket that was being freed in\nanother netns.\n\n  unshare(0x40060200)\n  r0 = syz_open_procfs(0x0, \u0026(0x7f0000002080)=\u0027net/raw\\x00\u0027)\n  socket$inet_icmp_raw(0x2, 0x3, 0x1)\n  pread64(r0, \u0026(0x7f0000000000)=\"\"/10, 0xa, 0x10000000007f)\n\nAfter commit 0daf07e52709 (\"raw: convert raw sockets to RCU\"), we\nuse RCU and hlist_nulls_for_each_entry() to iterate over SOCK_RAW\nsockets.  However, we should use spinlock for slow paths to avoid\nthe NULL deref.\n\nAlso, SOCK_RAW does not use SLAB_TYPESAFE_BY_RCU, and the slab object\nis not reused during iteration in the grace period.  In fact, the\nlockless readers do not check the nulls marker with get_nulls_value().\nSo, SOCK_RAW should use hlist instead of hlist_nulls.\n\nInstead of adding an unnecessary barrier by sk_nulls_for_each_rcu(),\nlet\u0027s convert hlist_nulls to hlist and use sk_for_each_rcu() for\nfast paths and sk_for_each() and spinlock for /proc/net/raw.\n\n[0]:\ngeneral protection fault, probably for non-canonical address 0xdffffc0000000005: 0000 [#1] PREEMPT SMP KASAN\nKASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f]\nCPU: 2 PID: 20952 Comm: syz-executor.0 Not tainted 6.2.0-g048ec869bafd-dirty #7\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS rel-1.14.0-0-g155821a1990b-prebuilt.qemu.org 04/01/2014\nRIP: 0010:read_pnet include/net/net_namespace.h:383 [inline]\nRIP: 0010:sock_net include/net/sock.h:649 [inline]\nRIP: 0010:raw_get_next net/ipv4/raw.c:974 [inline]\nRIP: 0010:raw_get_idx net/ipv4/raw.c:986 [inline]\nRIP: 0010:raw_seq_start+0x431/0x800 net/ipv4/raw.c:995\nCode: ef e8 33 3d 94 f7 49 8b 6d 00 4c 89 ef e8 b7 65 5f f7 49 89 ed 49 83 c5 98 0f 84 9a 00 00 00 48 83 c5 c8 48 89 e8 48 c1 e8 03 \u003c42\u003e 80 3c 30 00 74 08 48 89 ef e8 00 3d 94 f7 4c 8b 7d 00 48 89 ef\nRSP: 0018:ffffc9001154f9b0 EFLAGS: 00010206\nRAX: 0000000000000005 RBX: 1ffff1100302c8fd RCX: 0000000000000000\nRDX: 0000000000000028 RSI: ffffc9001154f988 RDI: ffffc9000f77a338\nRBP: 0000000000000029 R08: ffffffff8a50ffb4 R09: fffffbfff24b6bd9\nR10: fffffbfff24b6bd9 R11: 0000000000000000 R12: ffff88801db73b78\nR13: fffffffffffffff9 R14: dffffc0000000000 R15: 0000000000000030\nFS:  00007f843ae8e700(0000) GS:ffff888063700000(0000) knlGS:0000000000000000\nCS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\nCR2: 000055bb9614b35f CR3: 000000003c672000 CR4: 00000000003506e0\nDR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\nDR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\nCall Trace:\n \u003cTASK\u003e\n seq_read_iter+0x4c6/0x10f0 fs/seq_file.c:225\n seq_read+0x224/0x320 fs/seq_file.c:162\n pde_read fs/proc/inode.c:316 [inline]\n proc_reg_read+0x23f/0x330 fs/proc/inode.c:328\n vfs_read+0x31e/0xd30 fs/read_write.c:468\n ksys_pread64 fs/read_write.c:665 [inline]\n __do_sys_pread64 fs/read_write.c:675 [inline]\n __se_sys_pread64 fs/read_write.c:672 [inline]\n __x64_sys_pread64+0x1e9/0x280 fs/read_write.c:672\n do_syscall_x64 arch/x86/entry/common.c:51 [inline]\n do_syscall_64+0x4e/0xa0 arch/x86/entry/common.c:82\n entry_SYSCALL_64_after_hwframe+0x63/0xcd\nRIP: 0033:0x478d29\nCode: f7 d8 64 89 02 b8 ff ff ff ff c3 66 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 \u003c48\u003e 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48\nRSP: 002b:00007f843ae8dbe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000011\nRAX: ffffffffffffffda RBX: 0000000000791408 RCX: 0000000000478d29\nRDX: 000000000000000a RSI: 0000000020000000 RDI: 0000000000000003\nRBP: 00000000f477909a R08: 0000000000000000 R09: 0000000000000000\nR10: 000010000000007f R11: 0000000000000246 R12: 0000000000791740\nR13: 0000000000791414 R14: 0000000000791408 R15: 00007ffc2eb48a50\n \u003c/TASK\u003e\nModules linked in:\n---[ end trace 0000000000000000 ]---\nRIP: 0010\n---truncated---"
          }
        ],
        "id": "CVE-2023-53198",
        "lastModified": "2026-06-17T06:44:29.250",
        "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": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2025-09-15T14:15:42.223",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/0a78cf7264d29abeca098eae0b188a10aabc8a32"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/67daeaecd70ef20ab540c21739d3f633734967a1"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/b34056bedf04d08ef24f713a7f93bad1274a838d"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-476"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-07-21T18:52:03+00:00",
      "cve": "CVE-2023-53198",
      "id": "CVE-2023-53198",
      "initial_release_date": "2023-01-01T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: raw: Fix NULL deref in raw_get_next()",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-53198.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-02T01:45:29Z",
      "cve": "CVE-2023-53198",
      "id": "CVE-2023-53198",
      "initial_release_date": "2025-09-15T23:27:40Z",
      "product_status:known_not_affected": "523",
      "product_status:recommended": "29",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2023-53198",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-53198.json",
      "version": "12"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.


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.