{"id":"CVE-2026-93804","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: ibss: wait for in-flight TX on disconnect\n\nWhile leaving an IBSS in ieee80211_ibss_disconnect() mac80211 flushes\nstations, turns the carrier off and imm…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: ibss: wait for in-flight TX on disconnect\n\nWhile leaving an IBSS in ieee80211_ibss_disconnect() mac80211 flushes\nstations, turns the carrier off and imm…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 20a3fb5e1a95caa34896853ca17a50d21c754969","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < b3451e6971248250312ad32dd7f63cc9f0a925f5","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < d0e69d9afa59b93c30294eba89b1f15f69e91105","Linux < 6.12.111","Linux < 6.18.53","Linux (all versions)"],"published":"2026-09-24","updated":"2026-09-25","sourceUpdated":"2026-09-25T13:17:21.260","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-93804","references":[{"url":"https://git.kernel.org/stable/c/20a3fb5e1a95caa34896853ca17a50d21c754969","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/b3451e6971248250312ad32dd7f63cc9f0a925f5","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d0e69d9afa59b93c30294eba89b1f15f69e91105","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93804.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-93804"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2540492"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93804"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93804"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93804.mbox"},{"url":"https://git.kernel.org/stable/c/8e4a07ed82bae5d13525770880dc6dfd27f9bccd"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"ingestedAt":"2026-09-24T16:47:15.897Z","epss":0.00174,"epssPercentile":0.06842,"cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-366"],"slug":"CVE-2026-93804","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: ibss: wait for in-flight TX on disconnect\n\nWhile leaving an IBSS in ieee80211_ibss_disconnect() mac80211 flushes\nstations, turns the carrier off and immediately tells the driver to\nleave as well. While there may be synchronize_net() in station flush\nand in this code later, packets can still be transmitted due to\ncross-CPU race conditions after carrier off is set.\nTherefore, it's possible for a race to happen where a TX to the\ndriver occurs while or after telling it to leave the IBSS. This can\nbe confusing to drivers, and in the case of iwlwifi leads to an\nattempt to use invalid queues.\n\nMove netif_carrier_off() to occur before sta_info_flush() during\nIBSS disconnect, and add synchronize_net() if flushing didn't,\nso that the synchronize_net() always happens between turning the\ncarrier off and telling the driver, avoiding this race.\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 · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 6, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, … · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93804.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":224300,"id":"CVE-2026-93804","ts":1792325078287,"field":"cvss","old":null,"new":"5.5"},{"seq":224299,"id":"CVE-2026-93804","ts":1792325078287,"field":"severity","old":"none","new":"medium"}]}