wifi: mac80211: fix mesh fast xmit path deletion UAF
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: fix mesh fast xmit path deletion UAF mesh_fast_tx_cache() stores raw mesh_path pointers. Path deletion flushes the cache and then frees the path with kfree_rcu(), but a lookup that already holds the path can insert a new cache entry after the flush. The cache then points at freed memory. Set MESH_PATH_DELETED before flushing, and skip inserting a cache entry if the path or MPP path is already deleted. Check this under the cache walk lock so it is ordered with the flush. Use WRITE_ONCE() for the deletion flag updates because the cache check reads flags without taking state_lock.
CVE-2026-98699
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-2026-98699
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": "d5edb9ae8d568745f893c5c5fa3837d85311b131",
"lessThan": "ebb7cba623d38733d33d79a8c7442f5ea04c0fb0",
"versionType": "git"
},
{
"status": "affected",
"version": "d5edb9ae8d568745f893c5c5fa3837d85311b131",
"lessThan": "0117f1aa189495e6f1ff608681678817995aee39",
"versionType": "git"
},
{
"status": "affected",
"version": "d5edb9ae8d568745f893c5c5fa3837d85311b131",
"lessThan": "128e800a41270ab197b1cc8043637a2924865608",
"versionType": "git"
},
{
"status": "affected",
"version": "d5edb9ae8d568745f893c5c5fa3837d85311b131",
"lessThan": "93da3ec938bfdcfb3899428f04c6d0c56fe32952",
"versionType": "git"
},
{
"status": "affected",
"version": "d5edb9ae8d568745f893c5c5fa3837d85311b131",
"lessThan": "ee3aadc43ea69d98f666431e787137ac0badbb85",
"versionType": "git"
}
],
"programFiles": [
"net/mac80211/mesh_pathtbl.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.4"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.4",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.56",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.10",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/mac80211/mesh_pathtbl.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-98699
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #48913 · Revision 1
- Added to Heist Feed
- Publisher date