CVE-2026-64174: Linux kernel · wifi: cfg80211: advance loop vars in cfg80211_merge_profile()
Affects Linux kernelSource CVE Database V5
Not known to be exploited · fixed in cedbb608494ba1e7a5c6c56b7f1d3fd470094f28 : update Linux kernel when convenient.
Data as of 6 Nov 2026, 17:03 UTC
Rated Medium by Threat Radar's AI analysis · No CVSS score from NVD or the CNA
Thin evidence
One scorer or none- CISA SSVC
- Exploitation
- No evidence of active exploitation and no public proof of concept
- Automatable
- Attackers cannot reliably automate steps 1–4 of the kill chain
- Technical impact
- Limited control over the software or limited information exposure
CISA SSVC assessment, 2026-11-06.
- Patch
- Available – fixed in cedbb608494ba1e7a5c6c56b7f1d3fd470094f28, c0bc4c8bd556cbe036a5b9ed333c0aab9aadfcb8, 67915715fd3874057457363c87c63e18829527df +5
Exploitation evidence
Disclosed: evidence found.
CVE published 19 Jul 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 6 Nov 2026.
What to do
Upgrade to a fixed release listed under Affected software.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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AI-suggested
A fix for this vulnerability is available in the Linux kernel source code as indicated by multiple fixed commit versions. Users and administrators should update affected Linux kernel versions to a fixed release containing the patches referenced by the commit hashes provided. No additional mitigation is required beyond applying the official fix.
Description
A vulnerability in the Linux kernel's cfg80211 subsystem affects the function cfg80211_merge_profile(). The issue arises because loop variables mbssid_elem and sub_elem are not advanced within a while-loop, causing repeated processing of the same data. This leads to excessive CPU time spent in the function when processing specially crafted malicious beacons, potentially causing performance degradation.
References
- git.kernel.org/stable/c/5817e1e5205498a5df66eba2b34e817f4210fd0f (opens in a new tab)
- git.kernel.org/stable/c/cedbb608494ba1e7a5c6c56b7f1d3fd470094f28 (opens in a new tab)
- git.kernel.org/stable/c/c0bc4c8bd556cbe036a5b9ed333c0aab9aadfcb8 (opens in a new tab)
- git.kernel.org/stable/c/1ced0f5a851f9cae274545a42a06c459b7fd8881 (opens in a new tab)
- git.kernel.org/stable/c/67915715fd3874057457363c87c63e18829527df (opens in a new tab)
- git.kernel.org/stable/c/6cfae4914439878b8acb35c7e3b40096eeb2ad9c (opens in a new tab)
- git.kernel.org/stable/c/1343a480f84b80c1249133a90ef87f8751d65cbb (opens in a new tab)
- git.kernel.org/stable/c/7666dbb1bacc4ba522b96740cba7283d243d16e1 (opens in a new tab)