xfs: initialise args->total for parent pointer updates

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-97551
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-25 11:17:05 UTC
Updated2026-09-25 11:17:05 UTC
DescriptionIn 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.

Risk And Classification

EPSS: 0.002000000 probability, percentile 0.088240000 (date 2026-09-27)

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected b7c62d90c12c6cc86f10b8a62cefe0029374b6ff 9ad85bce62cadfdf4242f6e6bbff2a52e51d30f1 git Not specified
CNA Linux Linux affected b7c62d90c12c6cc86f10b8a62cefe0029374b6ff c66e138af626cad4210da449996ae9e07ee63add git Not specified
CNA Linux Linux affected b7c62d90c12c6cc86f10b8a62cefe0029374b6ff ac9032882d673dd6679e1d873a2dc0131a1aeb43 git Not specified
CNA Linux Linux affected b7c62d90c12c6cc86f10b8a62cefe0029374b6ff 8e4ebb6afaa34bd2e8ce52da231003d24111c2d6 git Not specified
CNA Linux Linux affected 6.10 Not specified
CNA Linux Linux unaffected 6.10 semver Not specified
CNA Linux Linux unaffected 6.12.111 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.53 6.18.* semver Not specified
CNA Linux Linux unaffected 7.2.7 7.2.* semver Not specified
CNA Linux Linux unaffected 7.3-rc3 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/9ad85bce62cadfdf4242f6e6bbff2a52e51d30f1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/c66e138af626cad4210da449996ae9e07ee63add 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ac9032882d673dd6679e1d873a2dc0131a1aeb43 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/8e4ebb6afaa34bd2e8ce52da231003d24111c2d6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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