{"id":"CVE-2026-80809","summary":"ocfs2: fix missing metadata reservation for large xattrs","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nocfs2: fix missing metadata reservation for large xattrs\n\n[BUG]\nlsetxattr() panics the kernel when setting a large xattr value on a\nfragmented filesystem where the file already has an external xattr\nblock.\n\n[CAUSE]\nocfs2_calc_xattr_set_need() never reserves metadata blocks for a new\nxattr value's extent tree when the file already has an external xattr\nblock. The not_found path leaves meta_add at zero, so meta_ac is NULL\nwhen ocfs2_xattr_extend_allocation() runs.\n\nA new value root has room for a single extent record. On a fragmented\nfilesystem, the allocator cannot satisfy the xattr value in one\ncontiguous run, so each non-contiguous run requires its own extent\nrecord. When the value root's extent list is full and meta_ac is NULL,\nocfs2_add_clusters_in_btree() returns RESTART_META, and\nocfs2_xattr_extend_allocation() hits BUG_ON(why == RESTART_META).\n\n[FIX]\nThe case where no xattr block exists yet already calls\nocfs2_extend_meta_needed(&def_xv.xv.xr_list) to reserve value tree\nmetadata. Add the same reservation to the case where an xattr block\nalready exists, making the two cases consistent.\n\nReplace the BUG_ON with a -ENOSPC return so that if RESTART_META is\nreturned despite the reservation, the error propagates to userspace\ninstead of panicking the kernel.","modified":"2026-11-06T17:27:27.180688438Z","published":"2026-09-04T15:13:29.769Z","related":["SUSE-SU-2026:24550-1","SUSE-SU-2026:5091-1","SUSE-SU-2026:5121-1","openSUSE-SU-2026:11773-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80809.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/04ba24bce61c917b5b3009f0db470cbb72e26a0d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/0cdc7dde00ec63ac714271fa8b2918d630b8da1a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/50f0cbec45b0f3fd7e1263d01916518dbf31eb3f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6176313622e34fa3e2b66b9d0682d1e1c6b365c5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6a009f1e61b11d9e23d3c5aa1dacfb010945da45"},{"type":"WEB","url":"https://git.kernel.org/stable/c/743ac908282ac97ef6e73ac3a92df2cc8ecb7479"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a3ccb57086dd7652d5ecb826486144198a98a8e9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b4663405ae29d36011cd712d243456f3f9ab700d"},{"type":"WEB","url":"https://git.kernel.org/stable/c/b9eb5c9fdd81d82976d4d5be2b2458eb7d7e46ec"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80809.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80809"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"a78f9f4668949a6588b8872f162e86685c63d023"},{"fixed":"743ac908282ac97ef6e73ac3a92df2cc8ecb7479"},{"fixed":"04ba24bce61c917b5b3009f0db470cbb72e26a0d"},{"fixed":"b4663405ae29d36011cd712d243456f3f9ab700d"},{"fixed":"6a009f1e61b11d9e23d3c5aa1dacfb010945da45"},{"fixed":"b9eb5c9fdd81d82976d4d5be2b2458eb7d7e46ec"},{"fixed":"6176313622e34fa3e2b66b9d0682d1e1c6b365c5"},{"fixed":"a3ccb57086dd7652d5ecb826486144198a98a8e9"},{"fixed":"50f0cbec45b0f3fd7e1263d01916518dbf31eb3f"},{"fixed":"0cdc7dde00ec63ac714271fa8b2918d630b8da1a"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"2.6.34.2"},{"fixed":"2.6.35"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"92f61d8a31e270f9391e7bcc0ac638bd4262a8e0"}]}],"versions":["v2.6.34.15","v2.6.34.14","v2.6.34.13","v2.6.34.12","v2.6.34.11","v2.6.34.10","v2.6.34.9","v2.6.34.8","v2.6.34.7","v2.6.34.6","v2.6.34.5","v2.6.34.4","v2.6.34.3","v2.6.34.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80809.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.6.35"},{"fixed":"5.10.267"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.218"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.185"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.154"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.106"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.47"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.11"}]},{"type":"ECOSYSTEM","events":[{"introduced":"7.2.0"},{"fixed":"7.2.1"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80809.json"}}],"schema_version":"1.9.2"}