{"api_version":"1","generated_at":"2026-09-26T03:42:33+00:00","cve":"CVE-2026-93804","urls":{"html":"https://cve.report/CVE-2026-93804","api":"https://cve.report/api/cve/CVE-2026-93804.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-93804","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-93804"},"summary":{"title":"wifi: mac80211: ibss: wait for in-flight TX on disconnect","description":"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 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.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-24 17:17:13","updated_at":"2026-09-25 13:17:21"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/d0e69d9afa59b93c30294eba89b1f15f69e91105","name":"https://git.kernel.org/stable/c/d0e69d9afa59b93c30294eba89b1f15f69e91105","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/20a3fb5e1a95caa34896853ca17a50d21c754969","name":"https://git.kernel.org/stable/c/20a3fb5e1a95caa34896853ca17a50d21c754969","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/b3451e6971248250312ad32dd7f63cc9f0a925f5","name":"https://git.kernel.org/stable/c/b3451e6971248250312ad32dd7f63cc9f0a925f5","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-93804","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-93804","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 86a2ea4134b48f6371103cfceb521bf2d2bf76cd 20a3fb5e1a95caa34896853ca17a50d21c754969 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 86a2ea4134b48f6371103cfceb521bf2d2bf76cd b3451e6971248250312ad32dd7f63cc9f0a925f5 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 86a2ea4134b48f6371103cfceb521bf2d2bf76cd d0e69d9afa59b93c30294eba89b1f15f69e91105 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 3.3","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 3.3 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.111 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.53 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"93804","cve":"CVE-2026-93804","epss":"0.001660000","percentile":"0.051790000","score_date":"2026-09-25","updated_at":"2026-09-26 00:06:17"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/mac80211/ibss.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"20a3fb5e1a95caa34896853ca17a50d21c754969","status":"affected","version":"86a2ea4134b48f6371103cfceb521bf2d2bf76cd","versionType":"git"},{"lessThan":"b3451e6971248250312ad32dd7f63cc9f0a925f5","status":"affected","version":"86a2ea4134b48f6371103cfceb521bf2d2bf76cd","versionType":"git"},{"lessThan":"d0e69d9afa59b93c30294eba89b1f15f69e91105","status":"affected","version":"86a2ea4134b48f6371103cfceb521bf2d2bf76cd","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/mac80211/ibss.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"3.3"},{"lessThan":"3.3","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.111","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.53","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.111","versionStartIncluding":"3.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.53","versionStartIncluding":"3.3","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2","versionStartIncluding":"3.3","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"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 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."}],"providerMetadata":{"dateUpdated":"2026-09-25T12:43:11.708Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/20a3fb5e1a95caa34896853ca17a50d21c754969"},{"url":"https://git.kernel.org/stable/c/b3451e6971248250312ad32dd7f63cc9f0a925f5"},{"url":"https://git.kernel.org/stable/c/d0e69d9afa59b93c30294eba89b1f15f69e91105"}],"title":"wifi: mac80211: ibss: wait for in-flight TX on disconnect","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-93804","datePublished":"2026-09-24T16:02:38.223Z","dateReserved":"2026-09-18T17:59:28.790Z","dateUpdated":"2026-09-25T12:43:11.708Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-24 17:17:13","lastModifiedDate":"2026-09-25 13:17:21","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"93804","Ordinal":"1","Title":"wifi: mac80211: ibss: wait for in-flight TX on disconnect","CVE":"CVE-2026-93804","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"93804","Ordinal":"1","NoteData":"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 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.","Type":"Description","Title":"wifi: mac80211: ibss: wait for in-flight TX on disconnect"}]}}}