CVE-2026-43153 (GCVE-0-2026-43153)
Vulnerability from cvelistv5
Published
2026-05-06 11:27
Modified
2026-08-05 12:26
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: xfs: remove xfs_attr_leaf_hasname The calling convention of xfs_attr_leaf_hasname() is problematic, because it returns a NULL buffer when xfs_attr3_leaf_read fails, a valid buffer when xfs_attr3_leaf_lookup_int returns -ENOATTR or -EEXIST, and a non-NULL buffer pointer for an already released buffer when xfs_attr3_leaf_lookup_int fails with other error values. Fix this by simply open coding xfs_attr_leaf_hasname in the callers, so that the buffer release code is done by each caller of xfs_attr3_leaf_read.
References
Impacted products
Vendor Product Version
Linux Linux Version: 07120f1abdff80f3d1351f733661abe28d609535
Version: 07120f1abdff80f3d1351f733661abe28d609535
Version: 07120f1abdff80f3d1351f733661abe28d609535
Version: 07120f1abdff80f3d1351f733661abe28d609535
 Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/xfs/libxfs/xfs_attr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2fbc8421d1db102c0e5458607e042a23a03648b1",
              "status": "affected",
              "version": "07120f1abdff80f3d1351f733661abe28d609535",
              "versionType": "git"
            },
            {
              "lessThan": "457121c01f609b9934addbb04d5c1ef638c71c61",
              "status": "affected",
              "version": "07120f1abdff80f3d1351f733661abe28d609535",
              "versionType": "git"
            },
            {
              "lessThan": "530082df991903f3330354e99e0cb7b05debfa86",
              "status": "affected",
              "version": "07120f1abdff80f3d1351f733661abe28d609535",
              "versionType": "git"
            },
            {
              "lessThan": "3a65ea768b8094e4699e72f9ab420eb9e0f3f568",
              "status": "affected",
              "version": "07120f1abdff80f3d1351f733661abe28d609535",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/xfs/libxfs/xfs_attr.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.9"
            },
            {
              "lessThan": "5.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.75",
                  "versionStartIncluding": "5.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.16",
                  "versionStartIncluding": "5.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.6",
                  "versionStartIncluding": "5.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "5.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: remove xfs_attr_leaf_hasname\n\nThe calling convention of xfs_attr_leaf_hasname() is problematic, because\nit returns a NULL buffer when xfs_attr3_leaf_read fails, a valid buffer\nwhen xfs_attr3_leaf_lookup_int returns -ENOATTR or -EEXIST, and a\nnon-NULL buffer pointer for an already released buffer when\nxfs_attr3_leaf_lookup_int fails with other error values.\n\nFix this by simply open coding xfs_attr_leaf_hasname in the callers, so\nthat the buffer release code is done by each caller of\nxfs_attr3_leaf_read."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable XFS attr path is reached through local extended-attribute syscalls such as setxattr/removexattr on a mounted XFS filesystem, not through network packet processing.\nAC:L - Given a crafted or corrupted one-block XFS attribute leaf, the erroneous buffer release path is deterministic and does not require winning a race or depending on heap layout to trigger.\nPR:L - An unprivileged local user can reach the update path through user.* xattrs on regular files or directories for which they have normal write permission; the trigger does not require CAP_SYS_ADMIN once the filesystem is mounted.\nUI:N - The attacker can invoke the xattr operation directly; no additional victim action is needed for the vulnerable code path after the XFS filesystem is available.\nS:U - The corruption occurs inside the kernel/XFS buffer management path and does not cross a separate security authority such as a VM or device isolation boundary.\nC:H - The stale xfs_buf pointer can be released a second time, creating use-after-free/refcount corruption in kernel buffer/log-item objects, which can reasonably support kernel memory disclosure primitives.\nI:H - The double release is kernel memory corruption of reusable buffer-management objects, which is reasonably treatable as exploitable for arbitrary write or control-flow impact under the required higher-severity rule.\nA:H - At minimum, the stale or already freed buffer/log-item path can cause a kernel oops, panic, deadlock, or filesystem shutdown when repeatedly triggered."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:26:13.566Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2fbc8421d1db102c0e5458607e042a23a03648b1"
        },
        {
          "url": "https://git.kernel.org/stable/c/457121c01f609b9934addbb04d5c1ef638c71c61"
        },
        {
          "url": "https://git.kernel.org/stable/c/530082df991903f3330354e99e0cb7b05debfa86"
        },
        {
          "url": "https://git.kernel.org/stable/c/3a65ea768b8094e4699e72f9ab420eb9e0f3f568"
        }
      ],
      "title": "xfs: remove xfs_attr_leaf_hasname",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43153",
    "datePublished": "2026-05-06T11:27:34.446Z",
    "dateReserved": "2026-05-01T14:12:55.989Z",
    "dateUpdated": "2026-08-05T12:26:13.566Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.