fuse: fix invalidate lock leak on open O_TRUNC DAX failure
In the Linux kernel, the following vulnerability has been resolved: fuse: fix invalidate lock leak on open O_TRUNC DAX failure fuse_open() takes filemap_invalidate_lock() for a DAX truncate (dax_truncate = true) and releases it before the out_inode_unlock label. But when fuse_dax_break_layouts() fails, the goto out_inode_unlock skips the unlock and leaks the rwsem, so any later fault or truncate on the file stalls on the stale lock. fuse_dax_break_layouts() can fail with -ERESTARTSYS when a signal interrupts the wait for busy DAX pages to drain: open("file", O_RDWR | O_TRUNC) └─ fuse_open() ├─ filemap_invalidate_lock() # dax_truncate └─ fuse_dax_break_layouts() └─ dax_break_layout() └─ wait_page_idle() # TASK_INTERRUPTIBLE └─ fuse_wait_dax_page() # unlock, schedule, re-lock └─ signal → -ERESTARTSYS goto out_inode_unlock # <- lock leaked Fix this by moving filemap_invalidate_unlock() below the label so that all error paths release the lock, and rename the label to out_unlock as it now covers more than just the inode lock.
CVE-2026-80855
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-80855
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "d58366aab86854217b81679d1a9dcd54a2edfc2a",
"lessThan": "1b04d80a27d317064cce2307472f5bef9975bc50",
"versionType": "git"
},
{
"status": "affected",
"version": "2fdbb8dd01556e1501132b5ad3826e8f71e24a8b",
"lessThan": "a61524da59a2f5ac9c8de23ff98b30da769ab144",
"versionType": "git"
},
{
"status": "affected",
"version": "2fdbb8dd01556e1501132b5ad3826e8f71e24a8b",
"lessThan": "dcf30a56624c2a0cfab1bada5b1ca8cc0c02f010",
"versionType": "git"
},
{
"status": "affected",
"version": "2fdbb8dd01556e1501132b5ad3826e8f71e24a8b",
"lessThan": "7288c279ddbd654a06c82118c1a3f5570c1807f0",
"versionType": "git"
},
{
"status": "affected",
"version": "2fdbb8dd01556e1501132b5ad3826e8f71e24a8b",
"lessThan": "776e85fda752f9a15e0f82dec42ecacd12a9bd94",
"versionType": "git"
},
{
"status": "affected",
"version": "2fdbb8dd01556e1501132b5ad3826e8f71e24a8b",
"lessThan": "1d3e701cda2f41d48aa721b3ebefbe0fbf8d74da",
"versionType": "git"
},
{
"status": "affected",
"version": "2fdbb8dd01556e1501132b5ad3826e8f71e24a8b",
"lessThan": "e981474d7bf1457da12404e169ea147d2c8ecea7",
"versionType": "git"
},
{
"status": "affected",
"version": "2fdbb8dd01556e1501132b5ad3826e8f71e24a8b",
"lessThan": "a927f1867e61b78f39f9da0bbba3c98c2ca151fe",
"versionType": "git"
},
{
"status": "affected",
"version": "81775ab858b4236c52c5da7e25cec6e49dd91b46",
"versionType": "git"
},
{
"status": "affected",
"version": "b57e150ac2eac791d5d187923b73dc2dafaf67fa",
"versionType": "git"
},
{
"status": "affected",
"version": "1fdbbe246daf348adaa0739463384b16ceba1fc0",
"versionType": "git"
},
{
"status": "affected",
"version": "5.15.109",
"lessThan": "5.15.220",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.10.179",
"lessThan": "5.11",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.18.18",
"lessThan": "5.19",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.19.2",
"lessThan": "5.20",
"versionType": "semver"
}
],
"programFiles": [
"fs/fuse/file.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.0"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.0",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.220",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.187",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.156",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.108",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.49",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.13",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2.3",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/fuse/file.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80855
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #34870 · Revision 1
- Added to Heist Feed
- Publisher date