{"api_version":"1","generated_at":"2026-09-11T23:53:30+00:00","cve":"CVE-2026-80855","urls":{"html":"https://cve.report/CVE-2026-80855","api":"https://cve.report/api/cve/CVE-2026-80855.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-80855","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-80855"},"summary":{"title":"fuse: fix invalidate lock leak on open O_TRUNC DAX failure","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: fix invalidate lock leak on open O_TRUNC DAX failure\n\nfuse_open() takes filemap_invalidate_lock() for a DAX truncate\n(dax_truncate = true) and releases it before the out_inode_unlock\nlabel.  But when fuse_dax_break_layouts() fails, the goto\nout_inode_unlock skips the unlock and leaks the rwsem, so any later\nfault or truncate on the file stalls on the stale lock.\n\nfuse_dax_break_layouts() can fail with -ERESTARTSYS when a signal\ninterrupts the wait for busy DAX pages to drain:\n\n  open(\"file\", O_RDWR | O_TRUNC)\n  └─ fuse_open()\n     ├─ filemap_invalidate_lock()        # dax_truncate\n     └─ fuse_dax_break_layouts()\n        └─ dax_break_layout()\n           └─ wait_page_idle()           # TASK_INTERRUPTIBLE\n              └─ fuse_wait_dax_page()    # unlock, schedule, re-lock\n                 └─ signal → -ERESTARTSYS\n     goto out_inode_unlock               # <- lock leaked\n\nFix this by moving filemap_invalidate_unlock() below the label so\nthat all error paths release the lock, and rename the label to\nout_unlock as it now covers more than just the inode lock.","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/dcf30a56624c2a0cfab1bada5b1ca8cc0c02f010","name":"https://git.kernel.org/stable/c/dcf30a56624c2a0cfab1bada5b1ca8cc0c02f010","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/7288c279ddbd654a06c82118c1a3f5570c1807f0","name":"https://git.kernel.org/stable/c/7288c279ddbd654a06c82118c1a3f5570c1807f0","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a927f1867e61b78f39f9da0bbba3c98c2ca151fe","name":"https://git.kernel.org/stable/c/a927f1867e61b78f39f9da0bbba3c98c2ca151fe","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/e981474d7bf1457da12404e169ea147d2c8ecea7","name":"https://git.kernel.org/stable/c/e981474d7bf1457da12404e169ea147d2c8ecea7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1d3e701cda2f41d48aa721b3ebefbe0fbf8d74da","name":"https://git.kernel.org/stable/c/1d3e701cda2f41d48aa721b3ebefbe0fbf8d74da","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/776e85fda752f9a15e0f82dec42ecacd12a9bd94","name":"https://git.kernel.org/stable/c/776e85fda752f9a15e0f82dec42ecacd12a9bd94","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/1b04d80a27d317064cce2307472f5bef9975bc50","name":"https://git.kernel.org/stable/c/1b04d80a27d317064cce2307472f5bef9975bc50","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a61524da59a2f5ac9c8de23ff98b30da769ab144","name":"https://git.kernel.org/stable/c/a61524da59a2f5ac9c8de23ff98b30da769ab144","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80855","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80855","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected d58366aab86854217b81679d1a9dcd54a2edfc2a 1b04d80a27d317064cce2307472f5bef9975bc50 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b a61524da59a2f5ac9c8de23ff98b30da769ab144 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b dcf30a56624c2a0cfab1bada5b1ca8cc0c02f010 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b 7288c279ddbd654a06c82118c1a3f5570c1807f0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b 776e85fda752f9a15e0f82dec42ecacd12a9bd94 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b 1d3e701cda2f41d48aa721b3ebefbe0fbf8d74da git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b e981474d7bf1457da12404e169ea147d2c8ecea7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 2fdbb8dd01556e1501132b5ad3826e8f71e24a8b a927f1867e61b78f39f9da0bbba3c98c2ca151fe git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 81775ab858b4236c52c5da7e25cec6e49dd91b46 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected b57e150ac2eac791d5d187923b73dc2dafaf67fa git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1fdbbe246daf348adaa0739463384b16ceba1fc0 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.15.109 5.15.220 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.10.179 5.11 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.18.18 5.19 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.19.2 5.20 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.0","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.0 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":"80855","cve":"CVE-2026-80855","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/file.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"1b04d80a27d317064cce2307472f5bef9975bc50","status":"affected","version":"d58366aab86854217b81679d1a9dcd54a2edfc2a","versionType":"git"},{"lessThan":"a61524da59a2f5ac9c8de23ff98b30da769ab144","status":"affected","version":"2fdbb8dd01556e1501132b5ad3826e8f71e24a8b","versionType":"git"},{"lessThan":"dcf30a56624c2a0cfab1bada5b1ca8cc0c02f010","status":"affected","version":"2fdbb8dd01556e1501132b5ad3826e8f71e24a8b","versionType":"git"},{"lessThan":"7288c279ddbd654a06c82118c1a3f5570c1807f0","status":"affected","version":"2fdbb8dd01556e1501132b5ad3826e8f71e24a8b","versionType":"git"},{"lessThan":"776e85fda752f9a15e0f82dec42ecacd12a9bd94","status":"affected","version":"2fdbb8dd01556e1501132b5ad3826e8f71e24a8b","versionType":"git"},{"lessThan":"1d3e701cda2f41d48aa721b3ebefbe0fbf8d74da","status":"affected","version":"2fdbb8dd01556e1501132b5ad3826e8f71e24a8b","versionType":"git"},{"lessThan":"e981474d7bf1457da12404e169ea147d2c8ecea7","status":"affected","version":"2fdbb8dd01556e1501132b5ad3826e8f71e24a8b","versionType":"git"},{"lessThan":"a927f1867e61b78f39f9da0bbba3c98c2ca151fe","status":"affected","version":"2fdbb8dd01556e1501132b5ad3826e8f71e24a8b","versionType":"git"},{"status":"affected","version":"81775ab858b4236c52c5da7e25cec6e49dd91b46","versionType":"git"},{"status":"affected","version":"b57e150ac2eac791d5d187923b73dc2dafaf67fa","versionType":"git"},{"status":"affected","version":"1fdbbe246daf348adaa0739463384b16ceba1fc0","versionType":"git"},{"lessThan":"5.15.220","status":"affected","version":"5.15.109","versionType":"semver"},{"lessThan":"5.11","status":"affected","version":"5.10.179","versionType":"semver"},{"lessThan":"5.19","status":"affected","version":"5.18.18","versionType":"semver"},{"lessThan":"5.20","status":"affected","version":"5.19.2","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["fs/fuse/file.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.0"},{"lessThan":"6.0","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":"5.15.109","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.187","versionStartIncluding":"6.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.156","versionStartIncluding":"6.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.108","versionStartIncluding":"6.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.49","versionStartIncluding":"6.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.13","versionStartIncluding":"6.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.3","versionStartIncluding":"6.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"6.0","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.179","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.18.18","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.19.2","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 open O_TRUNC DAX failure\n\nfuse_open() takes filemap_invalidate_lock() for a DAX truncate\n(dax_truncate = true) and releases it before the out_inode_unlock\nlabel.  But when fuse_dax_break_layouts() fails, the goto\nout_inode_unlock skips the unlock and leaks the rwsem, so any later\nfault or truncate on the file stalls on the stale lock.\n\nfuse_dax_break_layouts() can fail with -ERESTARTSYS when a signal\ninterrupts the wait for busy DAX pages to drain:\n\n  open(\"file\", O_RDWR | O_TRUNC)\n  └─ fuse_open()\n     ├─ filemap_invalidate_lock()        # dax_truncate\n     └─ fuse_dax_break_layouts()\n        └─ dax_break_layout()\n           └─ wait_page_idle()           # TASK_INTERRUPTIBLE\n              └─ fuse_wait_dax_page()    # unlock, schedule, re-lock\n                 └─ signal → -ERESTARTSYS\n     goto out_inode_unlock               # <- lock leaked\n\nFix this by moving filemap_invalidate_unlock() below the label so\nthat all error paths release the lock, and rename the label to\nout_unlock as it now covers more than just the inode lock."}],"providerMetadata":{"dateUpdated":"2026-09-04T15:55:07.864Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/1b04d80a27d317064cce2307472f5bef9975bc50"},{"url":"https://git.kernel.org/stable/c/a61524da59a2f5ac9c8de23ff98b30da769ab144"},{"url":"https://git.kernel.org/stable/c/dcf30a56624c2a0cfab1bada5b1ca8cc0c02f010"},{"url":"https://git.kernel.org/stable/c/7288c279ddbd654a06c82118c1a3f5570c1807f0"},{"url":"https://git.kernel.org/stable/c/776e85fda752f9a15e0f82dec42ecacd12a9bd94"},{"url":"https://git.kernel.org/stable/c/1d3e701cda2f41d48aa721b3ebefbe0fbf8d74da"},{"url":"https://git.kernel.org/stable/c/e981474d7bf1457da12404e169ea147d2c8ecea7"},{"url":"https://git.kernel.org/stable/c/a927f1867e61b78f39f9da0bbba3c98c2ca151fe"}],"title":"fuse: fix invalidate lock leak on open O_TRUNC DAX failure","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-80855","datePublished":"2026-09-04T15:55:07.864Z","dateReserved":"2026-08-26T14:34:25.797Z","dateUpdated":"2026-09-04T15:55:07.864Z","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":"80855","Ordinal":"1","Title":"fuse: fix invalidate lock leak on open O_TRUNC DAX failure","CVE":"CVE-2026-80855","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"80855","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nfuse: fix invalidate lock leak on open O_TRUNC DAX failure\n\nfuse_open() takes filemap_invalidate_lock() for a DAX truncate\n(dax_truncate = true) and releases it before the out_inode_unlock\nlabel.  But when fuse_dax_break_layouts() fails, the goto\nout_inode_unlock skips the unlock and leaks the rwsem, so any later\nfault or truncate on the file stalls on the stale lock.\n\nfuse_dax_break_layouts() can fail with -ERESTARTSYS when a signal\ninterrupts the wait for busy DAX pages to drain:\n\n  open(\"file\", O_RDWR | O_TRUNC)\n  └─ fuse_open()\n     ├─ filemap_invalidate_lock()        # dax_truncate\n     └─ fuse_dax_break_layouts()\n        └─ dax_break_layout()\n           └─ wait_page_idle()           # TASK_INTERRUPTIBLE\n              └─ fuse_wait_dax_page()    # unlock, schedule, re-lock\n                 └─ signal → -ERESTARTSYS\n     goto out_inode_unlock               # <- lock leaked\n\nFix this by moving filemap_invalidate_unlock() below the label so\nthat all error paths release the lock, and rename the label to\nout_unlock as it now covers more than just the inode lock.","Type":"Description","Title":"fuse: fix invalidate lock leak on open O_TRUNC DAX failure"}]}}}