{"id":"CVE-2024-44963","state":"PUBLISHED","title":"btrfs: do not BUG_ON() when freeing tree block after error","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: do not BUG_ON() when freeing tree block after error\n\nWhen freeing a tree block, at btrfs_free_tree_block(), if we fail to\ncreate a delayed reference we don't deal with the error and just do a\nBUG_ON(). The error most likely to happen is -ENOMEM, and we have a\ncomment mentioning that only -ENOMEM can happen, but that is not true,\nbecause in case qgroups are enabled any error returned from\nbtrfs_qgroup_trace_extent_post() (can be -EUCLEAN or anything returned\nfrom btrfs_search_slot() for example) can be propagated back to\nbtrfs_free_tree_block().\n\nSo stop doing a BUG_ON() and return the error to the callers and make\nthem abort the transaction to prevent leaking space. Syzbot was\ntriggering this, likely due to memory allocation failure injection.","publishedAt":"2024-09-04T18:36:00.948Z","updatedAt":"2026-10-30T12:19:11.923Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"fb235dc06fac9eaa4408ade9c8b20d45d63c89b7","status":"affected","lessThan":"bfcef12f80b3a9bd6b09c7305679164e3307328a","versionType":"git"},{"version":"fb235dc06fac9eaa4408ade9c8b20d45d63c89b7","status":"affected","lessThan":"22d907bcd283d69d5e60497fc0d51969545c583b","versionType":"git"},{"version":"fb235dc06fac9eaa4408ade9c8b20d45d63c89b7","status":"affected","lessThan":"98251cd60b4d702a8a81de442ab621e83a3fb24f","versionType":"git"},{"version":"fb235dc06fac9eaa4408ade9c8b20d45d63c89b7","status":"affected","lessThan":"bb3868033a4cccff7be57e9145f2117cbdc91c11","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/btrfs/ctree.c","fs/btrfs/extent-tree.c","fs/btrfs/extent-tree.h","fs/btrfs/free-space-tree.c","fs/btrfs/ioctl.c","fs/btrfs/qgroup.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.11","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.64","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.10.5","status":"unaffected","lessThanOrEqual":"6.10.*","versionType":"semver"},{"version":"6.11","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/btrfs/ctree.c","fs/btrfs/extent-tree.c","fs/btrfs/extent-tree.h","fs/btrfs/free-space-tree.c","fs/btrfs/ioctl.c","fs/btrfs/qgroup.c"]}],"references":["https://git.kernel.org/stable/c/bfcef12f80b3a9bd6b09c7305679164e3307328a","https://git.kernel.org/stable/c/22d907bcd283d69d5e60497fc0d51969545c583b","https://git.kernel.org/stable/c/98251cd60b4d702a8a81de442ab621e83a3fb24f","https://git.kernel.org/stable/c/bb3868033a4cccff7be57e9145f2117cbdc91c11"],"weaknesses":[],"ingestedAt":"2026-10-30T12:36:04.432Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2024/44xxx/CVE-2024-44963.json","commit":"db8103c5921aac81d5d90efcf3745980dafabf49","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-44963","state":"PUBLISHED","datePublished":"2024-09-04T18:36:00.948Z","dateUpdated":"2026-10-30T12:19:11.923Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-08-21T05:34:56.667Z"},"containers":{"cna":{"title":"btrfs: do not BUG_ON() when freeing tree block after error","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: do not BUG_ON() when freeing tree block after error\n\nWhen freeing a tree block, at btrfs_free_tree_block(), if we fail to\ncreate a delayed reference we don't deal with the error and just do a\nBUG_ON(). The error most likely to happen is -ENOMEM, and we have a\ncomment mentioning that only -ENOMEM can happen, but that is not true,\nbecause in case qgroups are enabled any error returned from\nbtrfs_qgroup_trace_extent_post() (can be -EUCLEAN or anything returned\nfrom btrfs_search_slot() for example) can be propagated back to\nbtrfs_free_tree_block().\n\nSo stop doing a BUG_ON() and return the error to the callers and make\nthem abort the transaction to prevent leaking space. Syzbot was\ntriggering this, likely due to memory allocation failure injection."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"fb235dc06fac9eaa4408ade9c8b20d45d63c89b7","status":"affected","lessThan":"bfcef12f80b3a9bd6b09c7305679164e3307328a","versionType":"git"},{"version":"fb235dc06fac9eaa4408ade9c8b20d45d63c89b7","status":"affected","lessThan":"22d907bcd283d69d5e60497fc0d51969545c583b","versionType":"git"},{"version":"fb235dc06fac9eaa4408ade9c8b20d45d63c89b7","status":"affected","lessThan":"98251cd60b4d702a8a81de442ab621e83a3fb24f","versionType":"git"},{"version":"fb235dc06fac9eaa4408ade9c8b20d45d63c89b7","status":"affected","lessThan":"bb3868033a4cccff7be57e9145f2117cbdc91c11","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/btrfs/ctree.c","fs/btrfs/extent-tree.c","fs/btrfs/extent-tree.h","fs/btrfs/free-space-tree.c","fs/btrfs/ioctl.c","fs/btrfs/qgroup.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.11","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.11","versionType":"semver"},{"version":"6.1.191","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.64","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.10.5","status":"unaffected","lessThanOrEqual":"6.10.*","versionType":"semver"},{"version":"6.11","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/btrfs/ctree.c","fs/btrfs/extent-tree.c","fs/btrfs/extent-tree.h","fs/btrfs/free-space-tree.c","fs/btrfs/ioctl.c","fs/btrfs/qgroup.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/bfcef12f80b3a9bd6b09c7305679164e3307328a"},{"url":"https://git.kernel.org/stable/c/22d907bcd283d69d5e60497fc0d51969545c583b"},{"url":"https://git.kernel.org/stable/c/98251cd60b4d702a8a81de442ab621e83a3fb24f"},{"url":"https://git.kernel.org/stable/c/bb3868033a4cccff7be57e9145f2117cbdc91c11"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:19:11.923Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.1.191"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.6.64"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.10.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.11","versionEndExcluding":"6.11"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"id":"CVE-2024-44963","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2024-09-10T17:39:41.059166Z"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2024-09-12T17:33:35.583Z"}}]}}}