{"id":"CVE-2026-93802","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rsi: validate beacon length before fixed buffer copy\n\nrsi_prepare_beacon() copies the mac80211 beacon frame after\nFRAME_DESC_SZ into a management skb whose usable…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rsi: validate beacon length before fixed buffer copy\n\nrsi_prepare_beacon() copies the mac80211 beacon frame after\nFRAME_DESC_SZ into a management skb whose usable…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-120"],"vendor":"Linux","product":"Linux","affected":["Linux >= d26a9559403c7c3ec3b430f5825bc22c3d40abdb < 795ba65f46fe44061f1195951c122cc8ec685d44","Linux >= d26a9559403c7c3ec3b430f5825bc22c3d40abdb < 66a964432b2758a4cf69962366e37581d6e70632","Linux >= d26a9559403c7c3ec3b430f5825bc22c3d40abdb < 7f99742c3c2801f8033d8b7a0a58254d7f24fb1e","Linux >= d26a9559403c7c3ec3b430f5825bc22c3d40abdb < f08d7f3c916335a0e539f1c45c130615967fac47","Linux >= d26a9559403c7c3ec3b430f5825bc22c3d40abdb < 87710ad633ce4588aec88611d0d0745eb33a6991","Linux >= d26a9559403c7c3ec3b430f5825bc22c3d40abdb < 266f195d5a14eec6c482fd09fbc924584c3371a7","Linux >= d26a9559403c7c3ec3b430f5825bc22c3d40abdb < 8ecdeb8b8a33b22c597299043c0dcfce50beb9ea","Linux 4.14"],"published":"2026-09-24","updated":"2026-10-03","sourceUpdated":"2026-10-03T11:17:49.843","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93802","references":[{"url":"https://git.kernel.org/stable/c/266f195d5a14eec6c482fd09fbc924584c3371a7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/66a964432b2758a4cf69962366e37581d6e70632","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/795ba65f46fe44061f1195951c122cc8ec685d44","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7f99742c3c2801f8033d8b7a0a58254d7f24fb1e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/87710ad633ce4588aec88611d0d0745eb33a6991","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/8ecdeb8b8a33b22c597299043c0dcfce50beb9ea","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/f08d7f3c916335a0e539f1c45c130615967fac47","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93802.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-93802"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2540562"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93802"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93802"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93802.mbox"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00173,"epssPercentile":0.0664,"cvssSource":"vendor","ingestedAt":"2026-09-24T16:47:15.898Z","slug":"CVE-2026-93802","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rsi: validate beacon length before fixed buffer copy\n\nrsi_prepare_beacon() copies the mac80211 beacon frame after\nFRAME_DESC_SZ into a management skb whose usable tailroom may be smaller\nthan MAX_MGMT_PKT_SIZE after alignment.\n\nValidate the beacon length against the actual tailroom before the copy\nand skb_put(). Leave ownership of the management skb with the caller on\nerror, matching the existing rsi_send_beacon() cleanup path.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · updated 2026-09-29 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93802.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":212329,"id":"CVE-2026-93802","ts":1790668150183,"field":"cvss","old":null,"new":"5.5"},{"seq":212328,"id":"CVE-2026-93802","ts":1790668150183,"field":"severity","old":"none","new":"medium"}]}