VulnerabilityPublished 18 Oct 2026Updated 21 Oct 2026

CVE-2026-98699: Linux kernel · wifi: mac80211: fix mesh fast xmit path deletion UAF

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in ee3aadc43ea69d98f666431e787137ac0badbb85 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:18 UTC

Severity

Unrated

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.1% chance of exploitation in 30 days – higher than 6% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in ee3aadc43ea69d98f666431e787137ac0badbb85, ebb7cba623d38733d33d79a8c7442f5ea04c0fb0, 128e800a41270ab197b1cc8043637a2924865608 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ d5edb9ae8d568745f893c5c5fa3837d85311b131, < ee3aadc43ea69d98f666431e787137ac0badbb85	Fixed in ee3aadc43ea69d98f666431e787137ac0badbb85
LinuxLinux	Affected ≥ d5edb9ae8d568745f893c5c5fa3837d85311b131, < ebb7cba623d38733d33d79a8c7442f5ea04c0fb0	Fixed in ebb7cba623d38733d33d79a8c7442f5ea04c0fb0
LinuxLinux	Affected ≥ d5edb9ae8d568745f893c5c5fa3837d85311b131, < 128e800a41270ab197b1cc8043637a2924865608	Fixed in 128e800a41270ab197b1cc8043637a2924865608
LinuxLinux	Affected ≥ d5edb9ae8d568745f893c5c5fa3837d85311b131, < 0117f1aa189495e6f1ff608681678817995aee39	Fixed in 0117f1aa189495e6f1ff608681678817995aee39
LinuxLinux	Affected ≥ d5edb9ae8d568745f893c5c5fa3837d85311b131, < 93da3ec938bfdcfb3899428f04c6d0c56fe32952	Fixed in 93da3ec938bfdcfb3899428f04c6d0c56fe32952
LinuxLinux	Affected =6.4	Fixed in–

Description

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.

References

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