Answer in brief
CVE-2026-64174 records a Medium severity (CVSS 5.5) vulnerability in wifi: cfg80211: advance loop vars in cfg80211_merge_profile(). The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.1:rc4:*:*:*:*:*:* | Not reported | Not reported |
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=fe806e4992c9047affd263bcc13b2c047029a726 <5817e1e5205498a5df66eba2b34e817f4210fd0f || >=fe806e4992c9047affd263bcc13b2c047029a726 <cedbb608494ba1e7a5c6c56b7f1d3fd470094f28 || >=fe806e4992c9047affd263bcc13b2c047029a726 <c0bc4c8bd556cbe036a5b9ed333c0aab9aadfcb8 || >=fe806e4992c9047affd263bcc13b2c047029a726 <1ced0f5a851f9cae274545a42a06c459b7fd8881 || >=fe806e4992c9047affd263bcc13b2c047029a726 <67915715fd3874057457363c87c63e18829527df || >=fe806e4992c9047affd263bcc13b2c047029a726 <6cfae4914439878b8acb35c7e3b40096eeb2ad9c || >=fe806e4992c9047affd263bcc13b2c047029a726 <1343a480f84b80c1249133a90ef87f8751d65cbb || >=fe806e4992c9047affd263bcc13b2c047029a726 <7666dbb1bacc4ba522b96740cba7283d243d16e1 | 5817e1e5205498a5df66eba2b34e817f4210fd0f, cedbb608494ba1e7a5c6c56b7f1d3fd470094f28, c0bc4c8bd556cbe036a5b9ed333c0aab9aadfcb8, 1ced0f5a851f9cae274545a42a06c459b7fd8881, 67915715fd3874057457363c87c63e18829527df, 6cfae4914439878b8acb35c7e3b40096eeb2ad9c, 1343a480f84b80c1249133a90ef87f8751d65cbb, 7666dbb1bacc4ba522b96740cba7283d243d16e1 |
| Linux/Linuxgeneric | 5.2 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Nov 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 14, 2026
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.
Quoted source text, attributed separately from HOL analysis.