High
virtiofs: fix UAF on submount umount
In the Linux kernel, the following vulnerability has been resolved: virtiofs: fix UAF on submount umount iput() called from fuse_release_end() can Oops if the super block has already been destroyed. Normally this is prevented by waiting for num_waiting to go down to zero before commencing with super block shutdown. This only works, however, for the last submount instance, as the wait counter is per connection, not per superblock. Revert to using synchronous release requests for the auto_submounts case, which is virtiofs only at this time.
Announced Source revision 1
Original source ↗CVE-2026-53381
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-2026-53381
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": "548e1f2bac1d4df91a6138f26bb4ab00323fd948",
"lessThan": "607a1d4c42f649e6197567c0448fd9ebb316cd42",
"versionType": "git"
},
{
"status": "affected",
"version": "cfd1aa3e2b71f3327cb373c45a897c9028c62b35",
"lessThan": "1cc0e3a0c6499aaaa2f21a4fcbba388486afb25e",
"versionType": "git"
},
{
"status": "affected",
"version": "83b375c6efef69b1066ad2d79601221e7892745a",
"lessThan": "0b809199ff87c44487e516a725dd4be2185712ce",
"versionType": "git"
},
{
"status": "affected",
"version": "bfd17b6138df0122a95989457d8e18ce0b86165e",
"lessThan": "2181a09ba980f142650fb053666350ead4471cfe",
"versionType": "git"
},
{
"status": "affected",
"version": "b26923512dbe57ae4917bafd31396d22a9d1691a",
"lessThan": "97c4691653d145dcc699eca5d3aba3219a520f1f",
"versionType": "git"
},
{
"status": "affected",
"version": "26e5c67deb2e1f42a951f022fdf5b9f7eb747b01",
"lessThan": "2abfd3ffbd9452f72535d96ff3982b3ab1f8f2f9",
"versionType": "git"
},
{
"status": "affected",
"version": "26e5c67deb2e1f42a951f022fdf5b9f7eb747b01",
"lessThan": "39a2b95e008665c14f84e50ed411d898df7cd11b",
"versionType": "git"
},
{
"status": "affected",
"version": "26e5c67deb2e1f42a951f022fdf5b9f7eb747b01",
"lessThan": "e09412a714bcd49375198427bb4aa005037a9d6f",
"versionType": "git"
},
{
"status": "affected",
"version": "26e5c67deb2e1f42a951f022fdf5b9f7eb747b01",
"lessThan": "06b41351779e9289e8785694ade9042ae85e41ea",
"versionType": "git"
},
{
"status": "affected",
"version": "f19a1390af448d9e193c08e28ea5f727bf3c3049",
"versionType": "git"
},
{
"status": "affected",
"version": "5.10.246",
"lessThan": "5.10.260",
"versionType": "semver"
},
{
"status": "affected",
"version": "5.15.196",
"lessThan": "5.15.211",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.1.158",
"lessThan": "6.1.177",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.6.115",
"lessThan": "6.6.144",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.12.54",
"lessThan": "6.12.95",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.17.4",
"lessThan": "6.18",
"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": "6.18"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.18",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.10.260",
"versionType": "semver",
"lessThanOrEqual": "5.10.*"
},
{
"status": "unaffected",
"version": "5.15.211",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.177",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.144",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.95",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.37",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.0.14",
"versionType": "semver",
"lessThanOrEqual": "7.0.*"
},
{
"status": "unaffected",
"version": "7.1.2",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"fs/fuse/file.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-53381
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40817 · Revision 1
- Added to Heist Feed
- Publisher date