{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/xfs/xfs_fsmap.c",
            "fs/xfs/xfs_ioctl.c",
            "fs/xfs/xfs_iops.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "19a1a22029ad3ae3604c763af6bd1195cb73648f",
              "status": "affected",
              "version": "eba0549bc7d100691c13384b774346b8aa9cf9a9",
              "versionType": "git"
            },
            {
              "lessThan": "7809ac0161c7c5f52ed348fb1ec683b2b454a83e",
              "status": "affected",
              "version": "eba0549bc7d100691c13384b774346b8aa9cf9a9",
              "versionType": "git"
            },
            {
              "lessThan": "e2f62a9744ebad3bcb6347a648e615026e9efeff",
              "status": "affected",
              "version": "eba0549bc7d100691c13384b774346b8aa9cf9a9",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/xfs/xfs_fsmap.c",
            "fs/xfs/xfs_ioctl.c",
            "fs/xfs/xfs_iops.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.18"
            },
            {
              "lessThan": "5.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.59",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.13",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.59",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.13",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: fix capability check in xfs\n\nAn user reported a bug where he managed to evade group\u0027s quota\nby changing a file\u0027s gid to a different group id the same user\nbelonged to, even though quotas were enforced on both gids and the\nfile\u0027s size was big enough to exceed the quota\u0027s hardlimit.\n\nCommit eba0549bc7d1 replaced a capable() call by a\nhas_capability_noaudit() to prevent unnecessary selinux audit messages.\nTurns out that both calls have slightly different semantics even though\ntheir documentation seems similar. Where in a nutshell:\n\ncapable() - Tests the task\u0027s effective credentials\nhas_ns_capability_noaudit() - Tests the task\u0027s real credentials\n\nThis most of the time has no practical difference but in some cases like\nchanging attrs (specifically group id in this case) through a NFS client\nthis will allow the quota code to use XFS_QMOPT_FORCE_RES, effectively\nbypassing quota accounting checks.\n\nUsing instead ns_capable_noaudit() should fix this issue and prevent\nselinux audit messages.\n\nThis also fix the remaining calls to has_capability_noaudit()"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-28T10:34:45.102Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/19a1a22029ad3ae3604c763af6bd1195cb73648f"
        },
        {
          "url": "https://git.kernel.org/stable/c/7809ac0161c7c5f52ed348fb1ec683b2b454a83e"
        },
        {
          "url": "https://git.kernel.org/stable/c/e2f62a9744ebad3bcb6347a648e615026e9efeff"
        }
      ],
      "title": "xfs: fix capability check in xfs",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-99131",
    "datePublished": "2026-10-28T10:34:45.102Z",
    "dateReserved": "2026-09-25T10:25:14.394Z",
    "dateUpdated": "2026-10-28T10:34:45.102Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}