{"api_version":"1","generated_at":"2026-10-04T10:25:40+00:00","cve":"CVE-2026-97551","urls":{"html":"https://cve.report/CVE-2026-97551","api":"https://cve.report/api/cve/CVE-2026-97551.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-97551","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-97551"},"summary":{"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-25 11:17:05","updated_at":"2026-09-25 11:17:05"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/9ad85bce62cadfdf4242f6e6bbff2a52e51d30f1","name":"https://git.kernel.org/stable/c/9ad85bce62cadfdf4242f6e6bbff2a52e51d30f1","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c66e138af626cad4210da449996ae9e07ee63add","name":"https://git.kernel.org/stable/c/c66e138af626cad4210da449996ae9e07ee63add","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ac9032882d673dd6679e1d873a2dc0131a1aeb43","name":"https://git.kernel.org/stable/c/ac9032882d673dd6679e1d873a2dc0131a1aeb43","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/8e4ebb6afaa34bd2e8ce52da231003d24111c2d6","name":"https://git.kernel.org/stable/c/8e4ebb6afaa34bd2e8ce52da231003d24111c2d6","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-97551","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97551","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b7c62d90c12c6cc86f10b8a62cefe0029374b6ff 9ad85bce62cadfdf4242f6e6bbff2a52e51d30f1 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b7c62d90c12c6cc86f10b8a62cefe0029374b6ff c66e138af626cad4210da449996ae9e07ee63add git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b7c62d90c12c6cc86f10b8a62cefe0029374b6ff ac9032882d673dd6679e1d873a2dc0131a1aeb43 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b7c62d90c12c6cc86f10b8a62cefe0029374b6ff 8e4ebb6afaa34bd2e8ce52da231003d24111c2d6 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.10","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.10 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.111 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.53 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.7 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc3 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"97551","cve":"CVE-2026-97551","epss":"0.002000000","percentile":"0.088240000","score_date":"2026-09-27","updated_at":"2026-09-28 00:02:24"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"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"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.111","versionStartIncluding":"6.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.53","versionStartIncluding":"6.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.7","versionStartIncluding":"6.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc3","versionStartIncluding":"6.10","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-09-25T10:21:44.048Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}],"title":"xfs: initialise args->total for parent pointer updates","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-97551","datePublished":"2026-09-25T10:21:44.048Z","dateReserved":"2026-09-24T16:01:01.154Z","dateUpdated":"2026-09-25T10:21:44.048Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-25 11:17:05","lastModifiedDate":"2026-09-25 11:17:05","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"97551","Ordinal":"1","Title":"xfs: initialise args->total for parent pointer updates","CVE":"CVE-2026-97551","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"97551","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"xfs: initialise args->total for parent pointer updates"}]}}}