CVE-2026-64117

Kernel use-after-free via mesh RX status reuse

Published Jul 19, 2026 · Updated Jul 19, 2026

Use-after-free in Linux Kernel mac80211 6.4 through 7.0.10 allows physically proximate attackers to trigger invalid kernel memory access. ieee80211_rx_mesh_data() reuses skb->cb as transmit metadata and can free the skb before sta_stats_encode_rate() reads the aliased RX status. Reachability requires unicast forwarding on an 802.11 mesh path; the documented runtime result is a KASAN slab use-after-free, not demonstrated code execution or data disclosure.

CVSS severity8.8
High
EPSS probability0.23%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Use-after-free in Linux Kernel mac80211 6.4 through 7.0.10 allows physically proximate attackers to trigger invalid kernel memory access. ieee80211_rx_mesh_data() reuses skb->cb as transmit metadata and can free the skb before sta_stats_encode_rate() reads the aliased RX status. Reachability requires unicast forwarding on an 802.11 mesh path; the documented runtime result is a KASAN slab use-after-free, not demonstrated code execution or data disclosure.

The record

CVE
CVE-2026-64117
Published
Jul 19, 2026
Updated
Jul 19, 2026
Vendor
The Linux Kernel Organization
Product
Linux Kernel
Classifications
CWE-416, T1499.004
Attack vector
adjacent
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 19, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 19, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=3468e1e0c639032a603450f0830ccabfa76f5806 <2fb64f94f9afb774f2fa0c7835727d7a67f89f07
  2. Affected versionversion=3468e1e0c639032a603450f0830ccabfa76f5806 <d71c841be5d9e586ee7f36c0dc8ed4db0d9a1349
  3. Affected versionversion=6.4

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesunauthenticated

What is affected?

The Linux Kernel Organization · Linux Kernelversion=3468e1e0c639032a603450f0830ccabfa76f5806 <2fb64f94f9afb774f2fa0c7835727d7a67f89f07; version=3468e1e0c639032a603450f0830ccabfa76f5806 <d71c841be5d9e586ee7f36c0dc8ed4db0d9a1349; version=6.4

Published CVSS scores

8.8kernel.orgCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-416Use After Free
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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