{"id":"CVE-2026-90266","state":"PUBLISHED","title":"btrfs: zoned: don't force read-only on transient -EAGAIN from reloc merge","description":"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.","publishedAt":"2026-09-17T16:08:01.995Z","updatedAt":"2026-10-19T09:00:43.942Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7bcb04de982ff0718870112ad9f38c35cbca528b","status":"affected","lessThan":"8249dfe46337d599e2087b772a2e32ef9f77282b","versionType":"git"},{"version":"7bcb04de982ff0718870112ad9f38c35cbca528b","status":"affected","lessThan":"e549093c11a2fff8430df3dfbdb45eb9811a69a5","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/btrfs/block-group.c","fs/btrfs/relocation.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"7.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"7.1","versionType":"semver"},{"version":"7.2.6","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/btrfs/block-group.c","fs/btrfs/relocation.c"]}],"references":["https://git.kernel.org/stable/c/8249dfe46337d599e2087b772a2e32ef9f77282b","https://git.kernel.org/stable/c/e549093c11a2fff8430df3dfbdb45eb9811a69a5"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/90xxx/CVE-2026-90266.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-90266","state":"PUBLISHED","datePublished":"2026-09-17T16:08:01.995Z","dateUpdated":"2026-10-19T09:00:43.942Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.796Z"},"containers":{"cna":{"title":"btrfs: zoned: don't force read-only on transient -EAGAIN from reloc merge","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"7bcb04de982ff0718870112ad9f38c35cbca528b","status":"affected","lessThan":"8249dfe46337d599e2087b772a2e32ef9f77282b","versionType":"git"},{"version":"7bcb04de982ff0718870112ad9f38c35cbca528b","status":"affected","lessThan":"e549093c11a2fff8430df3dfbdb45eb9811a69a5","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/btrfs/block-group.c","fs/btrfs/relocation.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"7.1","status":"affected"},{"version":"0","status":"unaffected","lessThan":"7.1","versionType":"semver"},{"version":"7.2.6","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/btrfs/block-group.c","fs/btrfs/relocation.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/8249dfe46337d599e2087b772a2e32ef9f77282b"},{"url":"https://git.kernel.org/stable/c/e549093c11a2fff8430df3dfbdb45eb9811a69a5"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:00:43.942Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.1","versionEndExcluding":"7.2.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"7.1","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}