{"api_version":"1","generated_at":"2026-09-11T23:53:31+00:00","cve":"CVE-2026-80856","urls":{"html":"https://cve.report/CVE-2026-80856","api":"https://cve.report/api/cve/CVE-2026-80856.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80856","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80856"},"summary":{"title":"fuse: fix invalidate lock leak on setattr writeback failure","description":"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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-04 16:18:14","updated_at":"2026-09-04 16:18:14"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/8f14906ce9103ab8f2f1ebda45935a0d61b9d763","name":"https://git.kernel.org/stable/c/8f14906ce9103ab8f2f1ebda45935a0d61b9d763","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/03cfeeb135428fa83f0791d3f8f94d9298cae695","name":"https://git.kernel.org/stable/c/03cfeeb135428fa83f0791d3f8f94d9298cae695","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1758730d9eaa3c06cf415c3446d9f6eed9ed3eed","name":"https://git.kernel.org/stable/c/1758730d9eaa3c06cf415c3446d9f6eed9ed3eed","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/92588d187ba4697a322e7aefe5d9e538a87d1cd2","name":"https://git.kernel.org/stable/c/92588d187ba4697a322e7aefe5d9e538a87d1cd2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/dd278d954c0e96a9cbd3cc491e07b8267d25f8d5","name":"https://git.kernel.org/stable/c/dd278d954c0e96a9cbd3cc491e07b8267d25f8d5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/ea9fea370b8de4ffd72e0ef89550415c15637787","name":"https://git.kernel.org/stable/c/ea9fea370b8de4ffd72e0ef89550415c15637787","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9afeca0d569c9fc89d758fe7a9339d1e8afb1546","name":"https://git.kernel.org/stable/c/9afeca0d569c9fc89d758fe7a9339d1e8afb1546","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e8457ebfd77a46e8d1210e8888ea914ad064558e","name":"https://git.kernel.org/stable/c/e8457ebfd77a46e8d1210e8888ea914ad064558e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80856","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80856","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6ae330cad6ef22ab8347ea9e0707dc56a7c7363f 8f14906ce9103ab8f2f1ebda45935a0d61b9d763 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6ae330cad6ef22ab8347ea9e0707dc56a7c7363f 03cfeeb135428fa83f0791d3f8f94d9298cae695 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6ae330cad6ef22ab8347ea9e0707dc56a7c7363f 92588d187ba4697a322e7aefe5d9e538a87d1cd2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6ae330cad6ef22ab8347ea9e0707dc56a7c7363f ea9fea370b8de4ffd72e0ef89550415c15637787 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6ae330cad6ef22ab8347ea9e0707dc56a7c7363f 1758730d9eaa3c06cf415c3446d9f6eed9ed3eed git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6ae330cad6ef22ab8347ea9e0707dc56a7c7363f dd278d954c0e96a9cbd3cc491e07b8267d25f8d5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6ae330cad6ef22ab8347ea9e0707dc56a7c7363f e8457ebfd77a46e8d1210e8888ea914ad064558e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6ae330cad6ef22ab8347ea9e0707dc56a7c7363f 9afeca0d569c9fc89d758fe7a9339d1e8afb1546 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.10","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.10 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.220 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.187 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.156 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.108 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.49 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.13 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.3 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"80856","cve":"CVE-2026-80856","epss":"0.001650000","percentile":"0.059530000","score_date":"2026-09-07","updated_at":"2026-09-08 00:05:27"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["fs/fuse/dir.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"8f14906ce9103ab8f2f1ebda45935a0d61b9d763","status":"affected","version":"6ae330cad6ef22ab8347ea9e0707dc56a7c7363f","versionType":"git"},{"lessThan":"03cfeeb135428fa83f0791d3f8f94d9298cae695","status":"affected","version":"6ae330cad6ef22ab8347ea9e0707dc56a7c7363f","versionType":"git"},{"lessThan":"92588d187ba4697a322e7aefe5d9e538a87d1cd2","status":"affected","version":"6ae330cad6ef22ab8347ea9e0707dc56a7c7363f","versionType":"git"},{"lessThan":"ea9fea370b8de4ffd72e0ef89550415c15637787","status":"affected","version":"6ae330cad6ef22ab8347ea9e0707dc56a7c7363f","versionType":"git"},{"lessThan":"1758730d9eaa3c06cf415c3446d9f6eed9ed3eed","status":"affected","version":"6ae330cad6ef22ab8347ea9e0707dc56a7c7363f","versionType":"git"},{"lessThan":"dd278d954c0e96a9cbd3cc491e07b8267d25f8d5","status":"affected","version":"6ae330cad6ef22ab8347ea9e0707dc56a7c7363f","versionType":"git"},{"lessThan":"e8457ebfd77a46e8d1210e8888ea914ad064558e","status":"affected","version":"6ae330cad6ef22ab8347ea9e0707dc56a7c7363f","versionType":"git"},{"lessThan":"9afeca0d569c9fc89d758fe7a9339d1e8afb1546","status":"affected","version":"6ae330cad6ef22ab8347ea9e0707dc56a7c7363f","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/fuse/dir.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.10"},{"lessThan":"5.10","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.220","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.187","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.156","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.108","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.49","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.13","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.3","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.220","versionStartIncluding":"5.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.187","versionStartIncluding":"5.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.156","versionStartIncluding":"5.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.108","versionStartIncluding":"5.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.49","versionStartIncluding":"5.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.13","versionStartIncluding":"5.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.3","versionStartIncluding":"5.10","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"5.10","vulnerable":true}],"negate":false,"operator":"OR"}]}],"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."}],"providerMetadata":{"dateUpdated":"2026-09-04T15:55:09.250Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"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"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80856","datePublished":"2026-09-04T15:55:09.250Z","dateReserved":"2026-08-26T14:34:25.797Z","dateUpdated":"2026-09-04T15:55:09.250Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-04 16:18:14","lastModifiedDate":"2026-09-04 16:18:14","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"80856","Ordinal":"1","Title":"fuse: fix invalidate lock leak on setattr writeback failure","CVE":"CVE-2026-80856","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80856","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"fuse: fix invalidate lock leak on setattr writeback failure"}]}}}