{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80856","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-08-26T14:34:25.797Z","datePublished":"2026-09-04T15:55:09.250Z","dateUpdated":"2026-09-04T15:55:09.250Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-09-04T15:55:09.250Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: fix invalidate lock leak on setattr writeback failure\n\nfuse_do_setattr() takes filemap_invalidate_lock() for a DAX truncate\n(fault_blocked = true) and releases it at the out:/error: labels.  But\nwhen a writeback flush is also needed, a write_inode_now() failure\nreturns directly and leaks the lock, so any later fault or truncate on\nthe file stalls on the stale rwsem.\n\nFor example, truncate(2) on a setuid file reaches fuse_do_setattr()\nwith both ATTR_SIZE and ATTR_MODE set:\n\n  truncate(2)\n  └─ do_truncate()\n     ├─ dentry_needs_remove_privs()         # S_ISUID\n     └─ notify_change()                     # KILL_SUID -> ATTR_MODE\n        └─ fuse_setattr()                   # no killpriv:\n           │                                #   ia_valid |= ATTR_MODE\n           └─ fuse_do_setattr()\n              ├─ filemap_invalidate_lock()  # IS_DAX && is_truncate\n              └─ write_inode_now()          # is_wb && ATTR_MODE\n                 └─ if (err)                # e.g. daemon -> -EIO\n                    return err              # <- lock leaked\n\nFix this by adding an unlock label that releases the lock before\nreturning the error, and use it for the fuse_dax_break_layouts()\nfailure path as well."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/fuse/dir.c"],"versions":[{"version":"6ae330cad6ef22ab8347ea9e0707dc56a7c7363f","lessThan":"8f14906ce9103ab8f2f1ebda45935a0d61b9d763","status":"affected","versionType":"git"},{"version":"6ae330cad6ef22ab8347ea9e0707dc56a7c7363f","lessThan":"03cfeeb135428fa83f0791d3f8f94d9298cae695","status":"affected","versionType":"git"},{"version":"6ae330cad6ef22ab8347ea9e0707dc56a7c7363f","lessThan":"92588d187ba4697a322e7aefe5d9e538a87d1cd2","status":"affected","versionType":"git"},{"version":"6ae330cad6ef22ab8347ea9e0707dc56a7c7363f","lessThan":"ea9fea370b8de4ffd72e0ef89550415c15637787","status":"affected","versionType":"git"},{"version":"6ae330cad6ef22ab8347ea9e0707dc56a7c7363f","lessThan":"1758730d9eaa3c06cf415c3446d9f6eed9ed3eed","status":"affected","versionType":"git"},{"version":"6ae330cad6ef22ab8347ea9e0707dc56a7c7363f","lessThan":"dd278d954c0e96a9cbd3cc491e07b8267d25f8d5","status":"affected","versionType":"git"},{"version":"6ae330cad6ef22ab8347ea9e0707dc56a7c7363f","lessThan":"e8457ebfd77a46e8d1210e8888ea914ad064558e","status":"affected","versionType":"git"},{"version":"6ae330cad6ef22ab8347ea9e0707dc56a7c7363f","lessThan":"9afeca0d569c9fc89d758fe7a9339d1e8afb1546","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/fuse/dir.c"],"versions":[{"version":"5.10","status":"affected"},{"version":"0","lessThan":"5.10","status":"unaffected","versionType":"semver"},{"version":"5.15.220","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.187","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.156","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.108","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.49","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"7.1.13","lessThanOrEqual":"7.1.*","status":"unaffected","versionType":"semver"},{"version":"7.2.3","lessThanOrEqual":"7.2.*","status":"unaffected","versionType":"semver"},{"version":"7.3-rc1","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"5.15.220"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.1.187"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.6.156"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.12.108"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"6.18.49"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"7.1.13"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"7.2.3"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10","versionEndExcluding":"7.3-rc1"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/8f14906ce9103ab8f2f1ebda45935a0d61b9d763"},{"url":"https://git.kernel.org/stable/c/03cfeeb135428fa83f0791d3f8f94d9298cae695"},{"url":"https://git.kernel.org/stable/c/92588d187ba4697a322e7aefe5d9e538a87d1cd2"},{"url":"https://git.kernel.org/stable/c/ea9fea370b8de4ffd72e0ef89550415c15637787"},{"url":"https://git.kernel.org/stable/c/1758730d9eaa3c06cf415c3446d9f6eed9ed3eed"},{"url":"https://git.kernel.org/stable/c/dd278d954c0e96a9cbd3cc491e07b8267d25f8d5"},{"url":"https://git.kernel.org/stable/c/e8457ebfd77a46e8d1210e8888ea914ad064558e"},{"url":"https://git.kernel.org/stable/c/9afeca0d569c9fc89d758fe7a9339d1e8afb1546"}],"title":"fuse: fix invalidate lock leak on setattr writeback failure","x_generator":{"engine":"bippy-1.2.0"}}}}