CVE-2026-64174
CVE CVE-2026-64174EUVD EUVD-2026-45859Published 2026-07-19T15:40:59.000Z
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: wifi: cfg80211: advance loop vars in cfg80211_merge_profile() cfg80211_merge_profile() reassembles a Multi-BSSID non-transmitted BSS profile that has been split across multiple consecutive MBSSID elements. Its while-loop calls cfg80211_get_profile_continuation(ie, ielen, mbssid_elem, sub_elem) but never advances mbssid_elem or sub_elem inside the body. Each iteration therefore searches for a continuation that follows the same fixed pair; the helper returns the same next_mbssid; and the same next_sub bytes are memcpy()'d into merged_ie at a growing offset until the buffer fills. Advance both mbssid_elem and sub_elem to the just-consumed continuation so the next call to cfg80211_get_profile_continuation() searches for a further continuation beyond it (or returns NULL when none exists). A specially-crafted malicious beacon can take advantage of this bug to cause the kernel to spend an excessive amount of time in cfg80211_merge_profile (up to as much as 2ms per beacon received), which could theoretically be abused in some way.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux fe806e4992c9047affd263bcc13b2c047029a726 <7666dbb1bacc4ba522b96740cba7283d243d16e1; patch: 6.12.92; patch: 5.15.209; patch: 6.18.34; patch: 7.1; fe806e4992c9047affd263bcc13b2c047029a726 <cedbb608494ba1e7a5c6c56b7f1d3fd470094f28; patch: 5.10.258; fe806e4992c9047affd263bcc13b2c047029a726 <1ced0f5a851f9cae274545a42a06c459b7fd8881; fe806e4992c9047affd263bcc13b2c047029a726 <1343a480f84b80c1249133a90ef87f8751d65cbb; patch: 6.1.175; fe806e4992c9047affd263bcc13b2c047029a726 <6cfae4914439878b8acb35c7e3b40096eeb2ad9c; fe806e4992c9047affd263bcc13b2c047029a726 <5817e1e5205498a5df66eba2b34e817f4210fd0f; 5.2; fe806e4992c9047affd263bcc13b2c047029a726 <c0bc4c8bd556cbe036a5b9ed333c0aab9aadfcb8; fe806e4992c9047affd263bcc13b2c047029a726 <67915715fd3874057457363c87c63e18829527df; patch: 0; patch: 7.0.11; patch: 6.6.142
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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