fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free
In the Linux kernel, the following vulnerability has been resolved: fuse: wait for FR_FINISHED on abort_on_kill to prevent use-after-free The abort_on_kill path in request_wait_answer() calls fuse_abort_conn() and returns without waiting for FR_FINISHED. If fuse_dev_do_write() is concurrently processing the same request (FR_LOCKED set), the caller frees req->args while it is still being accessed, causing a use-after-free. Fix this by jumping to the existing wait_event(FR_FINISHED) instead of returning early. The wait will not hang because fuse_abort_conn() ensures all requests are ended.
CVE-2026-80857
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-2026-80857
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": "0c7fca880a40a209a9c92be14143996d14b93ff6",
"lessThan": "a8bbb2a60513bf322170903c21462f0bf4f62be2",
"versionType": "git"
},
{
"status": "affected",
"version": "204aa22a686bfee48daca7db620c1e017615f2ff",
"lessThan": "715cb86e33cda43f5224cdc3fd5610c0b6a46f7a",
"versionType": "git"
},
{
"status": "affected",
"version": "204aa22a686bfee48daca7db620c1e017615f2ff",
"lessThan": "64b0b5cacbd2fea88001464cb712c9dfc795b26e",
"versionType": "git"
},
{
"status": "affected",
"version": "300e812b882a174dca675d8028684001ad5826bc",
"versionType": "git"
},
{
"status": "affected",
"version": "6.18.25",
"lessThan": "6.18.50",
"versionType": "semver"
},
{
"status": "affected",
"version": "7.0.2",
"lessThan": "7.1",
"versionType": "semver"
}
],
"programFiles": [
"fs/fuse/dev.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "7.1"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "7.1",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.18.50",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"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/dev.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-80857
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #34872 · Revision 1
- Added to Heist Feed
- Publisher date