Vulnerability-Lookup

FKIE_CVE-2026-74321

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

Severity

7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: btrfs: fix invalid pointer dereference in __btrfs_run_delayed_refs() In the beginning of the loop, we try to obtain a locked delayed ref head, if 'locked_ref' is currently NULL, by calling btrfs_select_ref_head(), which can return an error pointer. If the error pointer is -EAGAIN we do a continue and go back to the beginning of the loop, which will not try again to call btrfs_select_ref_head() since 'locked_ref' is no longer NULL but it's ERR_PTR(-EAGAIN), and then we do: spin_lock(&locked_ref->lock); against a ERR_PTR(-EAGAIN) value, generating an invalid pointer dereference. Fix this by ensuring that 'locked_ref' is set to NULL when btrfs_select_ref_head() returns ERR_PTR(-EAGAIN) and incrementing 'count' as well, to prevent infinite looping. We do this by doing a goto to the bottom of the loop that already sets 'locked_ref' to NULL and does a cond_resched(), with an increment to 'count' right before the goto. These measures were in place before the refactoring in commit 0110a4c43451 ("btrfs: refactor __btrfs_run_delayed_refs loop") but were unintentionally lost afterwards.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/015dc4a1e0c2cba551d4620eba13d26d5081dc34
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3b15d02be05e74321adb1e0ae0cb4ccfba7c6cb1
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/486f8298b6188ff11ef1f4be7f1d5d2e4d1b1fae
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/65770111a2d47c2b15e20b2ba92bb12198f289d4
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9faa6b69ad73f03c7bde53e07d75a28822dc9a1a
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a71143590ce9764dbcb47617647592ff8b4d48bc
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ba9fa2ff5981589bb49094d3358c339b37c47f53
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c372ca227e16bace86f1df1fa4ae6849e2fcfa28

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/extent-tree.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c372ca227e16bace86f1df1fa4ae6849e2fcfa28",
              "status": "affected",
              "version": "0110a4c43451533de1ea1bbdc57b5d452f9d8b25",
              "versionType": "git"
            },
            {
              "lessThan": "a71143590ce9764dbcb47617647592ff8b4d48bc",
              "status": "affected",
              "version": "0110a4c43451533de1ea1bbdc57b5d452f9d8b25",
              "versionType": "git"
            },
            {
              "lessThan": "65770111a2d47c2b15e20b2ba92bb12198f289d4",
              "status": "affected",
              "version": "0110a4c43451533de1ea1bbdc57b5d452f9d8b25",
              "versionType": "git"
            },
            {
              "lessThan": "015dc4a1e0c2cba551d4620eba13d26d5081dc34",
              "status": "affected",
              "version": "0110a4c43451533de1ea1bbdc57b5d452f9d8b25",
              "versionType": "git"
            },
            {
              "lessThan": "ba9fa2ff5981589bb49094d3358c339b37c47f53",
              "status": "affected",
              "version": "0110a4c43451533de1ea1bbdc57b5d452f9d8b25",
              "versionType": "git"
            },
            {
              "lessThan": "3b15d02be05e74321adb1e0ae0cb4ccfba7c6cb1",
              "status": "affected",
              "version": "0110a4c43451533de1ea1bbdc57b5d452f9d8b25",
              "versionType": "git"
            },
            {
              "lessThan": "9faa6b69ad73f03c7bde53e07d75a28822dc9a1a",
              "status": "affected",
              "version": "0110a4c43451533de1ea1bbdc57b5d452f9d8b25",
              "versionType": "git"
            },
            {
              "lessThan": "486f8298b6188ff11ef1f4be7f1d5d2e4d1b1fae",
              "status": "affected",
              "version": "0110a4c43451533de1ea1bbdc57b5d452f9d8b25",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/extent-tree.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.20"
            },
            {
              "lessThan": "4.20",
              "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\nbtrfs: fix invalid pointer dereference in __btrfs_run_delayed_refs()\n\nIn the beginning of the loop, we try to obtain a locked delayed ref head,\nif \u0027locked_ref\u0027 is currently NULL, by calling btrfs_select_ref_head(),\nwhich can return an error pointer. If the error pointer is -EAGAIN we do\na continue and go back to the beginning of the loop, which will not try\nagain to call btrfs_select_ref_head() since \u0027locked_ref\u0027 is no longer\nNULL but it\u0027s ERR_PTR(-EAGAIN), and then we do:\n\n   spin_lock(\u0026locked_ref-\u003elock);\n\nagainst a ERR_PTR(-EAGAIN) value, generating an invalid pointer\ndereference.\n\nFix this by ensuring that \u0027locked_ref\u0027 is set to NULL when\nbtrfs_select_ref_head() returns ERR_PTR(-EAGAIN) and incrementing \u0027count\u0027\nas well, to prevent infinite looping. We do this by doing a goto to the\nbottom of the loop that already sets \u0027locked_ref\u0027 to NULL and does a\ncond_resched(), with an increment to \u0027count\u0027 right before the goto.\nThese measures were in place before the refactoring in commit 0110a4c43451\n(\"btrfs: refactor __btrfs_run_delayed_refs loop\") but were unintentionally\nlost afterwards."
    }
  ],
  "id": "CVE-2026-74321",
  "lastModified": "2026-08-17T06:19:26.520",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-08-15T06:22:32.600",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/015dc4a1e0c2cba551d4620eba13d26d5081dc34"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3b15d02be05e74321adb1e0ae0cb4ccfba7c6cb1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/486f8298b6188ff11ef1f4be7f1d5d2e4d1b1fae"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/65770111a2d47c2b15e20b2ba92bb12198f289d4"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9faa6b69ad73f03c7bde53e07d75a28822dc9a1a"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a71143590ce9764dbcb47617647592ff8b4d48bc"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ba9fa2ff5981589bb49094d3358c339b37c47f53"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c372ca227e16bace86f1df1fa4ae6849e2fcfa28"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-74321 (GCVE-0-2026-74321)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:58 – Updated: 2026-08-17 05:45

Title

btrfs: fix invalid pointer dereference in __btrfs_run_delayed_refs()

Summary

Severity

7.5 (High)


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

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/c372ca227e16bace8…
https://git.kernel.org/stable/c/a71143590ce9764db…
https://git.kernel.org/stable/c/65770111a2d47c2b1…
https://git.kernel.org/stable/c/015dc4a1e0c2cba55…
https://git.kernel.org/stable/c/ba9fa2ff5981589bb…
https://git.kernel.org/stable/c/3b15d02be05e74321…
https://git.kernel.org/stable/c/9faa6b69ad73f03c7…
https://git.kernel.org/stable/c/486f8298b6188ff11…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 0110a4c43451533de1ea1bbdc57b5d452f9d8b25 , < c372ca227e16bace86f1df1fa4ae6849e2fcfa28 (git) Affected: 0110a4c43451533de1ea1bbdc57b5d452f9d8b25 , < a71143590ce9764dbcb47617647592ff8b4d48bc (git) Affected: 0110a4c43451533de1ea1bbdc57b5d452f9d8b25 , < 65770111a2d47c2b15e20b2ba92bb12198f289d4 (git) Affected: 0110a4c43451533de1ea1bbdc57b5d452f9d8b25 , < 015dc4a1e0c2cba551d4620eba13d26d5081dc34 (git) Affected: 0110a4c43451533de1ea1bbdc57b5d452f9d8b25 , < ba9fa2ff5981589bb49094d3358c339b37c47f53 (git) Affected: 0110a4c43451533de1ea1bbdc57b5d452f9d8b25 , < 3b15d02be05e74321adb1e0ae0cb4ccfba7c6cb1 (git) Affected: 0110a4c43451533de1ea1bbdc57b5d452f9d8b25 , < 9faa6b69ad73f03c7bde53e07d75a28822dc9a1a (git) Affected: 0110a4c43451533de1ea1bbdc57b5d452f9d8b25 , < 486f8298b6188ff11ef1f4be7f1d5d2e4d1b1fae (git)
Linux	Linux	Affected: 4.20 Unaffected: 0 , < 4.20 (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/btrfs/extent-tree.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c372ca227e16bace86f1df1fa4ae6849e2fcfa28",
              "status": "affected",
              "version": "0110a4c43451533de1ea1bbdc57b5d452f9d8b25",
              "versionType": "git"
            },
            {
              "lessThan": "a71143590ce9764dbcb47617647592ff8b4d48bc",
              "status": "affected",
              "version": "0110a4c43451533de1ea1bbdc57b5d452f9d8b25",
              "versionType": "git"
            },
            {
              "lessThan": "65770111a2d47c2b15e20b2ba92bb12198f289d4",
              "status": "affected",
              "version": "0110a4c43451533de1ea1bbdc57b5d452f9d8b25",
              "versionType": "git"
            },
            {
              "lessThan": "015dc4a1e0c2cba551d4620eba13d26d5081dc34",
              "status": "affected",
              "version": "0110a4c43451533de1ea1bbdc57b5d452f9d8b25",
              "versionType": "git"
            },
            {
              "lessThan": "ba9fa2ff5981589bb49094d3358c339b37c47f53",
              "status": "affected",
              "version": "0110a4c43451533de1ea1bbdc57b5d452f9d8b25",
              "versionType": "git"
            },
            {
              "lessThan": "3b15d02be05e74321adb1e0ae0cb4ccfba7c6cb1",
              "status": "affected",
              "version": "0110a4c43451533de1ea1bbdc57b5d452f9d8b25",
              "versionType": "git"
            },
            {
              "lessThan": "9faa6b69ad73f03c7bde53e07d75a28822dc9a1a",
              "status": "affected",
              "version": "0110a4c43451533de1ea1bbdc57b5d452f9d8b25",
              "versionType": "git"
            },
            {
              "lessThan": "486f8298b6188ff11ef1f4be7f1d5d2e4d1b1fae",
              "status": "affected",
              "version": "0110a4c43451533de1ea1bbdc57b5d452f9d8b25",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/extent-tree.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.20"
            },
            {
              "lessThan": "4.20",
              "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": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.212",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.178",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.145",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.97",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.40",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "4.20",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: fix invalid pointer dereference in __btrfs_run_delayed_refs()\n\nIn the beginning of the loop, we try to obtain a locked delayed ref head,\nif \u0027locked_ref\u0027 is currently NULL, by calling btrfs_select_ref_head(),\nwhich can return an error pointer. If the error pointer is -EAGAIN we do\na continue and go back to the beginning of the loop, which will not try\nagain to call btrfs_select_ref_head() since \u0027locked_ref\u0027 is no longer\nNULL but it\u0027s ERR_PTR(-EAGAIN), and then we do:\n\n   spin_lock(\u0026locked_ref-\u003elock);\n\nagainst a ERR_PTR(-EAGAIN) value, generating an invalid pointer\ndereference.\n\nFix this by ensuring that \u0027locked_ref\u0027 is set to NULL when\nbtrfs_select_ref_head() returns ERR_PTR(-EAGAIN) and incrementing \u0027count\u0027\nas well, to prevent infinite looping. We do this by doing a goto to the\nbottom of the loop that already sets \u0027locked_ref\u0027 to NULL and does a\ncond_resched(), with an increment to \u0027count\u0027 right before the goto.\nThese measures were in place before the refactoring in commit 0110a4c43451\n(\"btrfs: refactor __btrfs_run_delayed_refs loop\") but were unintentionally\nlost afterwards."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - On storage servers exporting btrfs via nfsd or ksmbd, remote client write/fsync/unlink I/O reaches btrfs_run_delayed_refs() and __btrfs_run_delayed_refs() in the server kernel without any local syscall; this is the highest-impact but reasonable deployment for btrfs metadata processing.\nAC:L - -EAGAIN is returned when a concurrent task deletes the delayed-ref head during btrfs_delayed_ref_lock(); an attacker controls both sides by driving parallel writes/unlinks/fsync or multiple NFS/SMB clients, reliably hitting the documented race without uncontrollable layout or victim state.\nPR:N - Exploitation needs only network write access to an NFS or SMB export of the btrfs filesystem; no local account, Linux capability, or init-namespace privilege is required when the export permits client writes (including anonymous/guest exports common on NAS appliances).\nUI:N - The fault is triggered entirely by the attacker\u0027s own concurrent filesystem I/O against an already-exported btrfs volume; no separate victim must mount a filesystem, open a file, or perform any interactive action beyond the attacker\u0027s own operations.\nS:U - The invalid pointer dereference and resulting kernel oops occur within the host kernel\u0027s btrfs delayed-ref processing; no VM escape, IOMMU bypass, or cross-sandbox boundary is crossed.\nC:N - The bug dereferences ERR_PTR(-EAGAIN), a small negative sentinel address, not freed or attacker-controlled memory; spin_lock faults immediately without returning kernel data, so there is no information-disclosure or read primitive.\nI:N - This is a logic error causing an invalid pointer dereference, not a use-after-free, out-of-bounds write, or type confusion; no kernel memory is modified before the faulting access aborts execution.\nA:H - Dereferencing ERR_PTR(-EAGAIN) in spin_lock(\u0026locked_ref-\u003elock) causes a kernel oops/panic during delayed-ref processing, which can hang or crash the host and deny all service on the affected btrfs filesystem; the condition is repeatable with concurrent I/O."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:45:52.396Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c372ca227e16bace86f1df1fa4ae6849e2fcfa28"
        },
        {
          "url": "https://git.kernel.org/stable/c/a71143590ce9764dbcb47617647592ff8b4d48bc"
        },
        {
          "url": "https://git.kernel.org/stable/c/65770111a2d47c2b15e20b2ba92bb12198f289d4"
        },
        {
          "url": "https://git.kernel.org/stable/c/015dc4a1e0c2cba551d4620eba13d26d5081dc34"
        },
        {
          "url": "https://git.kernel.org/stable/c/ba9fa2ff5981589bb49094d3358c339b37c47f53"
        },
        {
          "url": "https://git.kernel.org/stable/c/3b15d02be05e74321adb1e0ae0cb4ccfba7c6cb1"
        },
        {
          "url": "https://git.kernel.org/stable/c/9faa6b69ad73f03c7bde53e07d75a28822dc9a1a"
        },
        {
          "url": "https://git.kernel.org/stable/c/486f8298b6188ff11ef1f4be7f1d5d2e4d1b1fae"
        }
      ],
      "title": "btrfs: fix invalid pointer dereference in __btrfs_run_delayed_refs()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74321",
    "datePublished": "2026-08-15T05:58:17.485Z",
    "dateReserved": "2026-08-15T05:44:03.884Z",
    "dateUpdated": "2026-08-17T05:45:52.396Z",
    "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-2026-74321

CVE-2026-74321 (GCVE-0-2026-74321)

Tags

Sightings

Nomenclature