{"id":"CVE-2026-80855","state":"PUBLISHED","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.","publishedAt":"2026-09-04T15:55:07.864Z","updatedAt":"2026-10-30T12:31:16.183Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"81775ab858b4236c52c5da7e25cec6e49dd91b46","status":"affected","lessThan":"69a294e561c10909688bcb25456535dcd1818e1a","versionType":"git"},{"version":"d58366aab86854217b81679d1a9dcd54a2edfc2a","status":"affected","lessThan":"1b04d80a27d317064cce2307472f5bef9975bc50","versionType":"git"},{"version":"2fdbb8dd01556e1501132b5ad3826e8f71e24a8b","status":"affected","lessThan":"a61524da59a2f5ac9c8de23ff98b30da769ab144","versionType":"git"},{"version":"2fdbb8dd01556e1501132b5ad3826e8f71e24a8b","status":"affected","lessThan":"dcf30a56624c2a0cfab1bada5b1ca8cc0c02f010","versionType":"git"},{"version":"2fdbb8dd01556e1501132b5ad3826e8f71e24a8b","status":"affected","lessThan":"7288c279ddbd654a06c82118c1a3f5570c1807f0","versionType":"git"},{"version":"2fdbb8dd01556e1501132b5ad3826e8f71e24a8b","status":"affected","lessThan":"776e85fda752f9a15e0f82dec42ecacd12a9bd94","versionType":"git"},{"version":"2fdbb8dd01556e1501132b5ad3826e8f71e24a8b","status":"affected","lessThan":"1d3e701cda2f41d48aa721b3ebefbe0fbf8d74da","versionType":"git"},{"version":"2fdbb8dd01556e1501132b5ad3826e8f71e24a8b","status":"affected","lessThan":"e981474d7bf1457da12404e169ea147d2c8ecea7","versionType":"git"},{"version":"2fdbb8dd01556e1501132b5ad3826e8f71e24a8b","status":"affected","lessThan":"a927f1867e61b78f39f9da0bbba3c98c2ca151fe","versionType":"git"},{"version":"b57e150ac2eac791d5d187923b73dc2dafaf67fa","status":"affected","versionType":"git"},{"version":"1fdbbe246daf348adaa0739463384b16ceba1fc0","status":"affected","versionType":"git"},{"version":"5.10.179","status":"affected","lessThan":"5.10.273","versionType":"semver"},{"version":"5.15.109","status":"affected","lessThan":"5.15.220","versionType":"semver"},{"version":"5.18.18","status":"affected","lessThan":"5.19","versionType":"semver"},{"version":"5.19.2","status":"affected","lessThan":"5.20","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/fuse/file.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.0","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.220","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.187","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.156","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.108","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.49","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.13","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2.3","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/fuse/file.c"]}],"references":["https://git.kernel.org/stable/c/69a294e561c10909688bcb25456535dcd1818e1a","https://git.kernel.org/stable/c/1b04d80a27d317064cce2307472f5bef9975bc50","https://git.kernel.org/stable/c/a61524da59a2f5ac9c8de23ff98b30da769ab144","https://git.kernel.org/stable/c/dcf30a56624c2a0cfab1bada5b1ca8cc0c02f010","https://git.kernel.org/stable/c/7288c279ddbd654a06c82118c1a3f5570c1807f0","https://git.kernel.org/stable/c/776e85fda752f9a15e0f82dec42ecacd12a9bd94","https://git.kernel.org/stable/c/1d3e701cda2f41d48aa721b3ebefbe0fbf8d74da","https://git.kernel.org/stable/c/e981474d7bf1457da12404e169ea147d2c8ecea7","https://git.kernel.org/stable/c/a927f1867e61b78f39f9da0bbba3c98c2ca151fe"],"weaknesses":[],"ingestedAt":"2026-10-30T12:50:04.827Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/80xxx/CVE-2026-80855.json","commit":"1f312381e38164a43607eebab851b151dd16861e","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-80855","state":"PUBLISHED","datePublished":"2026-09-04T15:55:07.864Z","dateUpdated":"2026-10-30T12:31:16.183Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-08-26T14:34:25.797Z"},"containers":{"cna":{"title":"fuse: fix invalidate lock leak on open O_TRUNC DAX failure","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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"81775ab858b4236c52c5da7e25cec6e49dd91b46","status":"affected","lessThan":"69a294e561c10909688bcb25456535dcd1818e1a","versionType":"git"},{"version":"d58366aab86854217b81679d1a9dcd54a2edfc2a","status":"affected","lessThan":"1b04d80a27d317064cce2307472f5bef9975bc50","versionType":"git"},{"version":"2fdbb8dd01556e1501132b5ad3826e8f71e24a8b","status":"affected","lessThan":"a61524da59a2f5ac9c8de23ff98b30da769ab144","versionType":"git"},{"version":"2fdbb8dd01556e1501132b5ad3826e8f71e24a8b","status":"affected","lessThan":"dcf30a56624c2a0cfab1bada5b1ca8cc0c02f010","versionType":"git"},{"version":"2fdbb8dd01556e1501132b5ad3826e8f71e24a8b","status":"affected","lessThan":"7288c279ddbd654a06c82118c1a3f5570c1807f0","versionType":"git"},{"version":"2fdbb8dd01556e1501132b5ad3826e8f71e24a8b","status":"affected","lessThan":"776e85fda752f9a15e0f82dec42ecacd12a9bd94","versionType":"git"},{"version":"2fdbb8dd01556e1501132b5ad3826e8f71e24a8b","status":"affected","lessThan":"1d3e701cda2f41d48aa721b3ebefbe0fbf8d74da","versionType":"git"},{"version":"2fdbb8dd01556e1501132b5ad3826e8f71e24a8b","status":"affected","lessThan":"e981474d7bf1457da12404e169ea147d2c8ecea7","versionType":"git"},{"version":"2fdbb8dd01556e1501132b5ad3826e8f71e24a8b","status":"affected","lessThan":"a927f1867e61b78f39f9da0bbba3c98c2ca151fe","versionType":"git"},{"version":"b57e150ac2eac791d5d187923b73dc2dafaf67fa","status":"affected","versionType":"git"},{"version":"1fdbbe246daf348adaa0739463384b16ceba1fc0","status":"affected","versionType":"git"},{"version":"5.10.179","status":"affected","lessThan":"5.10.273","versionType":"semver"},{"version":"5.15.109","status":"affected","lessThan":"5.15.220","versionType":"semver"},{"version":"5.18.18","status":"affected","lessThan":"5.19","versionType":"semver"},{"version":"5.19.2","status":"affected","lessThan":"5.20","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/fuse/file.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.0","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.0","versionType":"semver"},{"version":"5.10.273","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.220","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.187","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.156","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.108","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.49","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.13","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2.3","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/fuse/file.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/69a294e561c10909688bcb25456535dcd1818e1a"},{"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-30T12:31:16.183Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.10.179","versionEndExcluding":"5.10.273"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.109","versionEndExcluding":"5.15.220"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.1.187"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.6.156"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.0","versionEndExcluding":"6.12.108"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStart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