{"id":"CVE-2026-64174","title":"wifi: cfg80211: advance loop vars in cfg80211_merge_profile()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: advance loop vars in cfg80211_merge_profile()\n\ncfg80211_merge_profile() reassembles a Multi-BSSID non-transmitted BSS\nprofile that has been split across…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= fe806e4992c9047affd263bcc13b2c047029a726 < 5817e1e5205498a5df66eba2b34e817f4210fd0f","Linux >= fe806e4992c9047affd263bcc13b2c047029a726 < cedbb608494ba1e7a5c6c56b7f1d3fd470094f28","Linux >= fe806e4992c9047affd263bcc13b2c047029a726 < c0bc4c8bd556cbe036a5b9ed333c0aab9aadfcb8","Linux >= fe806e4992c9047affd263bcc13b2c047029a726 < 1ced0f5a851f9cae274545a42a06c459b7fd8881","Linux >= fe806e4992c9047affd263bcc13b2c047029a726 < 67915715fd3874057457363c87c63e18829527df","Linux >= fe806e4992c9047affd263bcc13b2c047029a726 < 6cfae4914439878b8acb35c7e3b40096eeb2ad9c","Linux >= fe806e4992c9047affd263bcc13b2c047029a726 < 1343a480f84b80c1249133a90ef87f8751d65cbb","Linux >= fe806e4992c9047affd263bcc13b2c047029a726 < 7666dbb1bacc4ba522b96740cba7283d243d16e1","Linux 5.2"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T16:31:13.656098Z"},"published":"2026-07-19","updated":"2026-11-06","sourceUpdated":"2026-11-06T16:34:28.044Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-64174","references":[{"url":"https://git.kernel.org/stable/c/5817e1e5205498a5df66eba2b34e817f4210fd0f"},{"url":"https://git.kernel.org/stable/c/cedbb608494ba1e7a5c6c56b7f1d3fd470094f28"},{"url":"https://git.kernel.org/stable/c/c0bc4c8bd556cbe036a5b9ed333c0aab9aadfcb8"},{"url":"https://git.kernel.org/stable/c/1ced0f5a851f9cae274545a42a06c459b7fd8881"},{"url":"https://git.kernel.org/stable/c/67915715fd3874057457363c87c63e18829527df"},{"url":"https://git.kernel.org/stable/c/6cfae4914439878b8acb35c7e3b40096eeb2ad9c"},{"url":"https://git.kernel.org/stable/c/1343a480f84b80c1249133a90ef87f8751d65cbb"},{"url":"https://git.kernel.org/stable/c/7666dbb1bacc4ba522b96740cba7283d243d16e1"}],"tags":["cve.org"],"epss":0.0012,"epssPercentile":0.01809,"ingestedAt":"2026-11-06T16:57:43.231Z","slug":"CVE-2026-64174","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: advance loop vars in cfg80211_merge_profile()\n\ncfg80211_merge_profile() reassembles a Multi-BSSID non-transmitted BSS\nprofile that has been split across multiple consecutive MBSSID elements.\nIts while-loop calls\n\n\tcfg80211_get_profile_continuation(ie, ielen, mbssid_elem, sub_elem)\n\nbut never advances mbssid_elem or sub_elem inside the body.  Each\niteration therefore searches for a continuation that follows the same\nfixed pair; the helper returns the same next_mbssid; and the same\nnext_sub bytes are memcpy()'d into merged_ie at a growing offset until\nthe buffer fills.\n\nAdvance both mbssid_elem and sub_elem to the just-consumed continuation\nso the next call to cfg80211_get_profile_continuation() searches for a\nfurther continuation beyond it (or returns NULL when none exists).\n\nA specially-crafted malicious beacon can take advantage of this bug\nto cause the kernel to spend an excessive amount of time in\ncfg80211_merge_profile (up to as much as 2ms per beacon received),\nwhich could theoretically be abused in some way.\n\n## Affected\n\n- `Linux >= fe806e4992c9047affd263bcc13b2c047029a726 < 5817e1e5205498a5df66eba2b34e817f4210fd0f`\n- `Linux >= fe806e4992c9047affd263bcc13b2c047029a726 < cedbb608494ba1e7a5c6c56b7f1d3fd470094f28`\n- `Linux >= fe806e4992c9047affd263bcc13b2c047029a726 < c0bc4c8bd556cbe036a5b9ed333c0aab9aadfcb8`\n- `Linux >= fe806e4992c9047affd263bcc13b2c047029a726 < 1ced0f5a851f9cae274545a42a06c459b7fd8881`\n- `Linux >= fe806e4992c9047affd263bcc13b2c047029a726 < 67915715fd3874057457363c87c63e18829527df`\n- `Linux >= fe806e4992c9047affd263bcc13b2c047029a726 < 6cfae4914439878b8acb35c7e3b40096eeb2ad9c`\n- `Linux >= fe806e4992c9047affd263bcc13b2c047029a726 < 1343a480f84b80c1249133a90ef87f8751d65cbb`\n- `Linux >= fe806e4992c9047affd263bcc13b2c047029a726 < 7666dbb1bacc4ba522b96740cba7283d243d16e1`\n- `Linux 5.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}