GHSA-HPH3-HWFC-67WH
Vulnerability from github – Published: 2026-09-25 12:31 – Updated: 2026-09-25 12:31In 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.
{
"affected": [],
"aliases": [
"CVE-2026-97551"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-25T11:17:05Z",
"severity": null
},
"details": "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": "GHSA-hph3-hwfc-67wh",
"modified": "2026-09-25T12:31:24Z",
"published": "2026-09-25T12:31:24Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-97551"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8e4ebb6afaa34bd2e8ce52da231003d24111c2d6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/9ad85bce62cadfdf4242f6e6bbff2a52e51d30f1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/ac9032882d673dd6679e1d873a2dc0131a1aeb43"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/c66e138af626cad4210da449996ae9e07ee63add"
}
],
"schema_version": "1.4.0",
"severity": []
}
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