{"id":"CVE-2026-97551","state":"PUBLISHED","title":"xfs: initialise args->total for parent pointer updates","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: initialise args->total 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->total == 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->total 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.","publishedAt":"2026-09-25T10:21:44.048Z","updatedAt":"2026-10-19T09:09:14.354Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b7c62d90c12c6cc86f10b8a62cefe0029374b6ff","status":"affected","lessThan":"9ad85bce62cadfdf4242f6e6bbff2a52e51d30f1","versionType":"git"},{"version":"b7c62d90c12c6cc86f10b8a62cefe0029374b6ff","status":"affected","lessThan":"c66e138af626cad4210da449996ae9e07ee63add","versionType":"git"},{"version":"b7c62d90c12c6cc86f10b8a62cefe0029374b6ff","status":"affected","lessThan":"ac9032882d673dd6679e1d873a2dc0131a1aeb43","versionType":"git"},{"version":"b7c62d90c12c6cc86f10b8a62cefe0029374b6ff","status":"affected","lessThan":"8e4ebb6afaa34bd2e8ce52da231003d24111c2d6","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/xfs/libxfs/xfs_parent.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.10","versionType":"semver"},{"version":"6.12.111","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.53","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.7","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/xfs/libxfs/xfs_parent.c"]}],"references":["https://git.kernel.org/stable/c/9ad85bce62cadfdf4242f6e6bbff2a52e51d30f1","https://git.kernel.org/stable/c/c66e138af626cad4210da449996ae9e07ee63add","https://git.kernel.org/stable/c/ac9032882d673dd6679e1d873a2dc0131a1aeb43","https://git.kernel.org/stable/c/8e4ebb6afaa34bd2e8ce52da231003d24111c2d6"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/97xxx/CVE-2026-97551.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-97551","state":"PUBLISHED","datePublished":"2026-09-25T10:21:44.048Z","dateUpdated":"2026-10-19T09:09:14.354Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-24T16:01:01.154Z"},"containers":{"cna":{"title":"xfs: initialise args->total for parent pointer updates","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nxfs: initialise args->total 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->total == 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->total 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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"b7c62d90c12c6cc86f10b8a62cefe0029374b6ff","status":"affected","lessThan":"9ad85bce62cadfdf4242f6e6bbff2a52e51d30f1","versionType":"git"},{"version":"b7c62d90c12c6cc86f10b8a62cefe0029374b6ff","status":"affected","lessThan":"c66e138af626cad4210da449996ae9e07ee63add","versionType":"git"},{"version":"b7c62d90c12c6cc86f10b8a62cefe0029374b6ff","status":"affected","lessThan":"ac9032882d673dd6679e1d873a2dc0131a1aeb43","versionType":"git"},{"version":"b7c62d90c12c6cc86f10b8a62cefe0029374b6ff","status":"affected","lessThan":"8e4ebb6afaa34bd2e8ce52da231003d24111c2d6","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/xfs/libxfs/xfs_parent.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.10","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.10","versionType":"semver"},{"version":"6.12.111","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.53","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.7","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/xfs/libxfs/xfs_parent.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/9ad85bce62cadfdf4242f6e6bbff2a52e51d30f1"},{"url":"https://git.kernel.org/stable/c/c66e138af626cad4210da449996ae9e07ee63add"},{"url":"https://git.kernel.org/stable/c/ac9032882d673dd6679e1d873a2dc0131a1aeb43"},{"url":"https://git.kernel.org/stable/c/8e4ebb6afaa34bd2e8ce52da231003d24111c2d6"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:09:14.354Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"6.12.111"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"6.18.53"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"7.2.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.10","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}