Vulnerability-Lookup

FKIE_CVE-2026-74426

Vulnerability from fkie_nvd - Published: 2026-08-15 06:22 - Updated: 2026-08-17 06:19

Severity

Summary

In the Linux kernel, the following vulnerability has been resolved: afs: fix NULL pointer dereference in afs_get_tree() afs_alloc_sbi() uses kzalloc for memory allocation. And, if ctx->dyn_root is not null, as->cell and as->volume are null. In trace_afs_get_tree() they are dereferenced. KASAN error message: KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 2 PID: 18478 Comm: syz-executor.7 Not tainted 5.10.246-syzkaller #0 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 RIP: 0010:perf_trace_afs_get_tree+0x1d9/0x550 include/trace/events/afs.h:1365 Call Trace: trace_afs_get_tree include/trace/events/afs.h:1365 [inline] afs_get_tree+0x922/0x1350 fs/afs/super.c:599 vfs_get_tree+0x8e/0x300 fs/super.c:1572 do_new_mount fs/namespace.c:3011 [inline] path_mount+0x14a5/0x2220 fs/namespace.c:3341 do_mount fs/namespace.c:3354 [inline] __do_sys_mount fs/namespace.c:3562 [inline] __se_sys_mount fs/namespace.c:3539 [inline] __x64_sys_mount+0x283/0x300 fs/namespace.c:3539 do_syscall_64+0x33/0x50 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x67/0xd1 Found by Linux Verification Center (linuxtesting.org) with Syzkaller.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/0b70716081c6462be9b2928ad736d0d527b09678
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/23b3d457d8387bcb2a61063a9e520063ada9335f
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/67fb48c4a0874953212321cd5d57fdb4900dbc31
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/70b2842734d831c908474779bb8a76daf55f782c
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/867b3ea146a041023bfcd258e6db516b1bb28f19
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d5b17474feed3c30991f07affa2473adbad95055
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d648cc2069eb081707c061849046d909f57c78b1
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ea19edf71721cd42f923e3c70f4ff995b422fe3b

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/afs/super.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "67fb48c4a0874953212321cd5d57fdb4900dbc31",
              "status": "affected",
              "version": "80548b03991f58758a336424a90bf9f988e3b077",
              "versionType": "git"
            },
            {
              "lessThan": "d648cc2069eb081707c061849046d909f57c78b1",
              "status": "affected",
              "version": "80548b03991f58758a336424a90bf9f988e3b077",
              "versionType": "git"
            },
            {
              "lessThan": "d5b17474feed3c30991f07affa2473adbad95055",
              "status": "affected",
              "version": "80548b03991f58758a336424a90bf9f988e3b077",
              "versionType": "git"
            },
            {
              "lessThan": "867b3ea146a041023bfcd258e6db516b1bb28f19",
              "status": "affected",
              "version": "80548b03991f58758a336424a90bf9f988e3b077",
              "versionType": "git"
            },
            {
              "lessThan": "ea19edf71721cd42f923e3c70f4ff995b422fe3b",
              "status": "affected",
              "version": "80548b03991f58758a336424a90bf9f988e3b077",
              "versionType": "git"
            },
            {
              "lessThan": "23b3d457d8387bcb2a61063a9e520063ada9335f",
              "status": "affected",
              "version": "80548b03991f58758a336424a90bf9f988e3b077",
              "versionType": "git"
            },
            {
              "lessThan": "70b2842734d831c908474779bb8a76daf55f782c",
              "status": "affected",
              "version": "80548b03991f58758a336424a90bf9f988e3b077",
              "versionType": "git"
            },
            {
              "lessThan": "0b70716081c6462be9b2928ad736d0d527b09678",
              "status": "affected",
              "version": "80548b03991f58758a336424a90bf9f988e3b077",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/afs/super.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.2"
            },
            {
              "lessThan": "5.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nafs: fix NULL pointer dereference in afs_get_tree()\n\nafs_alloc_sbi() uses kzalloc for memory allocation. And, if\nctx-\u003edyn_root is not null, as-\u003ecell and as-\u003evolume are null.\nIn trace_afs_get_tree() they are dereferenced.\n\nKASAN error message:\n\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nCPU: 2 PID: 18478 Comm: syz-executor.7 Not tainted 5.10.246-syzkaller #0\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1\n04/01/2014\nRIP: 0010:perf_trace_afs_get_tree+0x1d9/0x550\ninclude/trace/events/afs.h:1365\n\nCall Trace:\ntrace_afs_get_tree include/trace/events/afs.h:1365 [inline]\nafs_get_tree+0x922/0x1350 fs/afs/super.c:599\nvfs_get_tree+0x8e/0x300 fs/super.c:1572\ndo_new_mount fs/namespace.c:3011 [inline]\npath_mount+0x14a5/0x2220 fs/namespace.c:3341\ndo_mount fs/namespace.c:3354 [inline]\n__do_sys_mount fs/namespace.c:3562 [inline]\n__se_sys_mount fs/namespace.c:3539 [inline]\n__x64_sys_mount+0x283/0x300 fs/namespace.c:3539\n do_syscall_64+0x33/0x50 arch/x86/entry/common.c:46\nentry_SYSCALL_64_after_hwframe+0x67/0xd1\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller."
    }
  ],
  "id": "CVE-2026-74426",
  "lastModified": "2026-08-17T06:19:38.110",
  "metrics": {},
  "published": "2026-08-15T06:22:44.690",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/0b70716081c6462be9b2928ad736d0d527b09678"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/23b3d457d8387bcb2a61063a9e520063ada9335f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/67fb48c4a0874953212321cd5d57fdb4900dbc31"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/70b2842734d831c908474779bb8a76daf55f782c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/867b3ea146a041023bfcd258e6db516b1bb28f19"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d5b17474feed3c30991f07affa2473adbad95055"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d648cc2069eb081707c061849046d909f57c78b1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ea19edf71721cd42f923e3c70f4ff995b422fe3b"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-74426 (GCVE-0-2026-74426)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:59 – Updated: 2026-08-17 05:19

Title

afs: fix NULL pointer dereference in afs_get_tree()

Summary

Severity

No CVSS data available.

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/67fb48c4a08749532…
https://git.kernel.org/stable/c/d648cc2069eb08170…
https://git.kernel.org/stable/c/d5b17474feed3c309…
https://git.kernel.org/stable/c/867b3ea146a041023…
https://git.kernel.org/stable/c/ea19edf71721cd42f…
https://git.kernel.org/stable/c/23b3d457d8387bcb2…
https://git.kernel.org/stable/c/70b2842734d831c90…
https://git.kernel.org/stable/c/0b70716081c6462be…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 80548b03991f58758a336424a90bf9f988e3b077 , < 67fb48c4a0874953212321cd5d57fdb4900dbc31 (git) Affected: 80548b03991f58758a336424a90bf9f988e3b077 , < d648cc2069eb081707c061849046d909f57c78b1 (git) Affected: 80548b03991f58758a336424a90bf9f988e3b077 , < d5b17474feed3c30991f07affa2473adbad95055 (git) Affected: 80548b03991f58758a336424a90bf9f988e3b077 , < 867b3ea146a041023bfcd258e6db516b1bb28f19 (git) Affected: 80548b03991f58758a336424a90bf9f988e3b077 , < ea19edf71721cd42f923e3c70f4ff995b422fe3b (git) Affected: 80548b03991f58758a336424a90bf9f988e3b077 , < 23b3d457d8387bcb2a61063a9e520063ada9335f (git) Affected: 80548b03991f58758a336424a90bf9f988e3b077 , < 70b2842734d831c908474779bb8a76daf55f782c (git) Affected: 80548b03991f58758a336424a90bf9f988e3b077 , < 0b70716081c6462be9b2928ad736d0d527b09678 (git)
Linux	Linux	Affected: 5.2 Unaffected: 0 , < 5.2 (semver) Unaffected: 5.10.261 , ≤ 5.10.* (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.97 , ≤ 6.12.* (semver) Unaffected: 6.18.40 , ≤ 6.18.* (semver) Unaffected: 7.1.5 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/afs/super.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "67fb48c4a0874953212321cd5d57fdb4900dbc31",
              "status": "affected",
              "version": "80548b03991f58758a336424a90bf9f988e3b077",
              "versionType": "git"
            },
            {
              "lessThan": "d648cc2069eb081707c061849046d909f57c78b1",
              "status": "affected",
              "version": "80548b03991f58758a336424a90bf9f988e3b077",
              "versionType": "git"
            },
            {
              "lessThan": "d5b17474feed3c30991f07affa2473adbad95055",
              "status": "affected",
              "version": "80548b03991f58758a336424a90bf9f988e3b077",
              "versionType": "git"
            },
            {
              "lessThan": "867b3ea146a041023bfcd258e6db516b1bb28f19",
              "status": "affected",
              "version": "80548b03991f58758a336424a90bf9f988e3b077",
              "versionType": "git"
            },
            {
              "lessThan": "ea19edf71721cd42f923e3c70f4ff995b422fe3b",
              "status": "affected",
              "version": "80548b03991f58758a336424a90bf9f988e3b077",
              "versionType": "git"
            },
            {
              "lessThan": "23b3d457d8387bcb2a61063a9e520063ada9335f",
              "status": "affected",
              "version": "80548b03991f58758a336424a90bf9f988e3b077",
              "versionType": "git"
            },
            {
              "lessThan": "70b2842734d831c908474779bb8a76daf55f782c",
              "status": "affected",
              "version": "80548b03991f58758a336424a90bf9f988e3b077",
              "versionType": "git"
            },
            {
              "lessThan": "0b70716081c6462be9b2928ad736d0d527b09678",
              "status": "affected",
              "version": "80548b03991f58758a336424a90bf9f988e3b077",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/afs/super.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.2"
            },
            {
              "lessThan": "5.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.261",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.261",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.212",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.178",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.145",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.97",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.40",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "5.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nafs: fix NULL pointer dereference in afs_get_tree()\n\nafs_alloc_sbi() uses kzalloc for memory allocation. And, if\nctx-\u003edyn_root is not null, as-\u003ecell and as-\u003evolume are null.\nIn trace_afs_get_tree() they are dereferenced.\n\nKASAN error message:\n\nKASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007]\nCPU: 2 PID: 18478 Comm: syz-executor.7 Not tainted 5.10.246-syzkaller #0\nHardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1\n04/01/2014\nRIP: 0010:perf_trace_afs_get_tree+0x1d9/0x550\ninclude/trace/events/afs.h:1365\n\nCall Trace:\ntrace_afs_get_tree include/trace/events/afs.h:1365 [inline]\nafs_get_tree+0x922/0x1350 fs/afs/super.c:599\nvfs_get_tree+0x8e/0x300 fs/super.c:1572\ndo_new_mount fs/namespace.c:3011 [inline]\npath_mount+0x14a5/0x2220 fs/namespace.c:3341\ndo_mount fs/namespace.c:3354 [inline]\n__do_sys_mount fs/namespace.c:3562 [inline]\n__se_sys_mount fs/namespace.c:3539 [inline]\n__x64_sys_mount+0x283/0x300 fs/namespace.c:3539\n do_syscall_64+0x33/0x50 arch/x86/entry/common.c:46\nentry_SYSCALL_64_after_hwframe+0x67/0xd1\n\nFound by Linux Verification Center (linuxtesting.org) with Syzkaller."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:19:11.836Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/67fb48c4a0874953212321cd5d57fdb4900dbc31"
        },
        {
          "url": "https://git.kernel.org/stable/c/d648cc2069eb081707c061849046d909f57c78b1"
        },
        {
          "url": "https://git.kernel.org/stable/c/d5b17474feed3c30991f07affa2473adbad95055"
        },
        {
          "url": "https://git.kernel.org/stable/c/867b3ea146a041023bfcd258e6db516b1bb28f19"
        },
        {
          "url": "https://git.kernel.org/stable/c/ea19edf71721cd42f923e3c70f4ff995b422fe3b"
        },
        {
          "url": "https://git.kernel.org/stable/c/23b3d457d8387bcb2a61063a9e520063ada9335f"
        },
        {
          "url": "https://git.kernel.org/stable/c/70b2842734d831c908474779bb8a76daf55f782c"
        },
        {
          "url": "https://git.kernel.org/stable/c/0b70716081c6462be9b2928ad736d0d527b09678"
        }
      ],
      "title": "afs: fix NULL pointer dereference in afs_get_tree()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74426",
    "datePublished": "2026-08-15T05:59:28.427Z",
    "dateReserved": "2026-08-15T05:44:03.894Z",
    "dateUpdated": "2026-08-17T05:19:11.836Z",
    "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.

Action not permitted

FKIE_CVE-2026-74426

CVE-2026-74426 (GCVE-0-2026-74426)

Tags

Sightings

Nomenclature