FKIE_CVE-2026-97551

Vulnerability from fkie_nvd - Published: 2026-09-25 11:17 - Updated: 2026-09-25 11:17
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: xfs: initialise args->total for parent pointer updates xfs_parent_da_args_init() builds an xfs_da_args from a zeroed xfs_parent_args (kmem_cache_zalloc), leaving args->total == 0. xfs_da_grow_inode_int() treats that field as a running block reservation and subtracts from it; because it is an xfs_extlen_t (uint32_t), the first attr-fork growth wraps it to ~0U. That defeats the free-space check in xfs_alloc_space_available(), and when it coincides with an AG that has exactly zero available blocks the allocation is clamped to maxlen 0 and returns -ENOSPC, which xfs_defer_finish_noroll() escalates to a filesystem shutdown. Set args->total the way the log recovery path does (xfs_attri_recover_work(), xfs_attr_item.c:706), in the add and replace paths that can grow the fork. Removals and lookups never grow it, so they leave the field alone, matching that switch.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/8e4ebb6afaa34bd2e8ce52da231003d24111c2d6
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/9ad85bce62cadfdf4242f6e6bbff2a52e51d30f1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/ac9032882d673dd6679e1d873a2dc0131a1aeb43
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/c66e138af626cad4210da449996ae9e07ee63add
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/xfs/libxfs/xfs_parent.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "9ad85bce62cadfdf4242f6e6bbff2a52e51d30f1",
              "status": "affected",
              "version": "b7c62d90c12c6cc86f10b8a62cefe0029374b6ff",
              "versionType": "git"
            },
            {
              "lessThan": "c66e138af626cad4210da449996ae9e07ee63add",
              "status": "affected",
              "version": "b7c62d90c12c6cc86f10b8a62cefe0029374b6ff",
              "versionType": "git"
            },
            {
              "lessThan": "ac9032882d673dd6679e1d873a2dc0131a1aeb43",
              "status": "affected",
              "version": "b7c62d90c12c6cc86f10b8a62cefe0029374b6ff",
              "versionType": "git"
            },
            {
              "lessThan": "8e4ebb6afaa34bd2e8ce52da231003d24111c2d6",
              "status": "affected",
              "version": "b7c62d90c12c6cc86f10b8a62cefe0029374b6ff",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/xfs/libxfs/xfs_parent.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.10"
            },
            {
              "lessThan": "6.10",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.7",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc3",
              "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\nxfs: initialise args-\u003etotal for parent pointer updates\n\nxfs_parent_da_args_init() builds an xfs_da_args from a zeroed\nxfs_parent_args (kmem_cache_zalloc), leaving args-\u003etotal == 0.\nxfs_da_grow_inode_int() treats that field as a running block reservation\nand subtracts from it; because it is an xfs_extlen_t (uint32_t), the\nfirst attr-fork growth wraps it to ~0U.  That defeats the free-space\ncheck in xfs_alloc_space_available(), and when it coincides with an AG\nthat has exactly zero available blocks the allocation is clamped to\nmaxlen 0 and returns -ENOSPC, which xfs_defer_finish_noroll() escalates\nto a filesystem shutdown.\n\nSet args-\u003etotal the way the log recovery path does\n(xfs_attri_recover_work(), xfs_attr_item.c:706), in the add and replace\npaths that can grow the fork.  Removals and lookups never grow it, so\nthey leave the field alone, matching that switch."
    }
  ],
  "id": "CVE-2026-97551",
  "lastModified": "2026-09-25T11:17:05.530",
  "metrics": {},
  "published": "2026-09-25T11:17:05.530",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8e4ebb6afaa34bd2e8ce52da231003d24111c2d6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/9ad85bce62cadfdf4242f6e6bbff2a52e51d30f1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ac9032882d673dd6679e1d873a2dc0131a1aeb43"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/c66e138af626cad4210da449996ae9e07ee63add"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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