{"id":"CVE-2026-90266","summary":"btrfs: zoned: don't force read-only on transient -EAGAIN from reloc merge","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: zoned: don't force read-only on transient -EAGAIN from reloc merge\n\nOn a zoned FS, btrfs_delayed_refs_rsv_refill() returns -EAGAIN whenever\nthe over-committed metadata plus the zone_unusable bytes exceeds the\nusable size in a metadata block-group to avoid heavy over-commit of\nmetadata and early ENOSPC in one transaction.\n\nIf this happens while doing reclaim, the transaction is getting aborted.\n\nTreat -EAGAIN as a soft, retryable condition in case of block-group\nreclaim.","modified":"2026-09-19T03:47:25.610755373Z","published":"2026-09-17T16:08:01.995Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90266.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/8249dfe46337d599e2087b772a2e32ef9f77282b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e549093c11a2fff8430df3dfbdb45eb9811a69a5"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/90xxx/CVE-2026-90266.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90266"},{"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":"7bcb04de982ff0718870112ad9f38c35cbca528b"},{"fixed":"8249dfe46337d599e2087b772a2e32ef9f77282b"},{"fixed":"e549093c11a2fff8430df3dfbdb45eb9811a69a5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90266.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"7.1.0"},{"fixed":"7.2.6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-90266.json"}}],"schema_version":"1.9.0"}