{"id":"CVE-2026-97551","summary":"xfs: initialise args-\u003etotal for parent pointer updates","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.","modified":"2026-09-26T03:47:02.014128107Z","published":"2026-09-25T10:21:44.048Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97551.json"},"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"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"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/97xxx/CVE-2026-97551.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97551"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"b7c62d90c12c6cc86f10b8a62cefe0029374b6ff"},{"fixed":"9ad85bce62cadfdf4242f6e6bbff2a52e51d30f1"},{"fixed":"c66e138af626cad4210da449996ae9e07ee63add"},{"fixed":"ac9032882d673dd6679e1d873a2dc0131a1aeb43"},{"fixed":"8e4ebb6afaa34bd2e8ce52da231003d24111c2d6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-97551.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"6.10.0"},{"fixed":"6.12.111"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.53"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.2.7"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-97551.json"}}],"schema_version":"1.9.0"}