CVE-2026-93805

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-93805", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-18T17:59:28.790Z", "datePublished": "2026-09-24T16:02:39.248Z", "dateUpdated": "2026-10-03T10:57:38.089Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-03T10:57:38.089Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: validate rx/tx MLME callback frame lengths before access\n\ncfg80211_rx_mlme_mgmt() and cfg80211_tx_mlme_mgmt() call tracepoints\nbefore rejecting frames shorter than the frame-control field. After\nthat, they only require len >= 2 before dispatching into subtype\nhandlers that assume their fixed fields are present.\n\nThe frames that trip this are not shorter than 2 bytes; they are short\nrelative to their subtype. mwifiex is a concrete in-tree example on the\nlength side: mwifiex_process_mgmt_packet() only requires a 4-address\nieee80211_hdr plus the 2-byte firmware length prefix before handing the\nframe to cfg80211_rx_mlme_mgmt(). After stripping the length prefix and\nremoving addr4, pkt_len can be exactly 24: a bare 3-address management\nheader with no reason-code body. The existing WARN_ON(len < 2) does not\nfire on such a frame, and cfg80211_process_deauth() then reads\nu.deauth.reason_code as a two-byte access starting at offset 24,\nimmediately past the 24-byte buffer.\n\nAdd a frame-control length gate, then validate each subtype's minimum\nframe size in an if/else-if chain that mirrors the dispatch logic. Trace\nonly after the frame is known to be well-formed.\n\nSide effects of this change:\n - The WARN_ON(len < 2) is dropped. It only guarded the frame_control\n read, never the subtype fixed fields, and it does not fire on the\n frames that actually trigger the out-of-bounds read (which are >= 2).\n The len >= 2 check is kept as the guard before dereferencing\n frame_control, but without the warning: these are exported callbacks\n and a malformed frame from a driver should be dropped silently rather\n than backtraced.\n - cfg80211_tx_mlme_mgmt() previously routed every non-deauth subtype\n through disassociation handling; it now silently ignores unrecognised\n subtypes."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/wireless/mlme.c"], "versions": [{"version": "6829c878ecd24ff0ae41b4668c7e9d0f11b66942", "lessThan": "6eb4bd50be53f5afbabb3a3b5153276e08fa7a4a", "status": "affected", "versionType": "git"}, {"version": "6829c878ecd24ff0ae41b4668c7e9d0f11b66942", "lessThan": "ce2a3be6909462f49c34de96be71f0ad5f0d573f", "status": "affected", "versionType": "git"}, {"version": "6829c878ecd24ff0ae41b4668c7e9d0f11b66942", "lessThan": "6bdf4dcff98df634e04ebf99f52027a48d7f78ff", "status": "affected", "versionType": "git"}, {"version": "6829c878ecd24ff0ae41b4668c7e9d0f11b66942", "lessThan": "0ec738a0d361d7eb37188117166d201f9df622d3", "status": "affected", "versionType": "git"}, {"version": "6829c878ecd24ff0ae41b4668c7e9d0f11b66942", "lessThan": "8f4127a93cf60d561ad39849a9ac763ba0e14db5", "status": "affected", "versionType": "git"}, {"version": "6829c878ecd24ff0ae41b4668c7e9d0f11b66942", "lessThan": "d5e4586546974179feca305a94e07fac3e9727fe", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/wireless/mlme.c"], "versions": [{"version": "2.6.32", "status": "affected"}, {"version": "0", "lessThan": "2.6.32", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.222", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.189", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.158", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.111", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.53", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "5.15.222"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "6.1.189"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "6.12.111"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "6.18.53"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6eb4bd50be53f5afbabb3a3b5153276e08fa7a4a"}, {"url": "https://git.kernel.org/stable/c/ce2a3be6909462f49c34de96be71f0ad5f0d573f"}, {"url": "https://git.kernel.org/stable/c/6bdf4dcff98df634e04ebf99f52027a48d7f78ff"}, {"url": "https://git.kernel.org/stable/c/0ec738a0d361d7eb37188117166d201f9df622d3"}, {"url": "https://git.kernel.org/stable/c/8f4127a93cf60d561ad39849a9ac763ba0e14db5"}, {"url": "https://git.kernel.org/stable/c/d5e4586546974179feca305a94e07fac3e9727fe"}], "title": "wifi: cfg80211: validate rx/tx MLME callback frame lengths before access", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/wireless/mlme.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "6eb4bd50be53f5afbabb3a3b5153276e08fa7a4a", "status": "affected", "version": "6829c878ecd24ff0ae41b4668c7e9d0f11b66942", "versionType": "git"}, {"lessThan": "ce2a3be6909462f49c34de96be71f0ad5f0d573f", "status": "affected", "version": "6829c878ecd24ff0ae41b4668c7e9d0f11b66942", "versionType": "git"}, {"lessThan": "6bdf4dcff98df634e04ebf99f52027a48d7f78ff", "status": "affected", "version": "6829c878ecd24ff0ae41b4668c7e9d0f11b66942", "versionType": "git"}, {"lessThan": "0ec738a0d361d7eb37188117166d201f9df622d3", "status": "affected", "version": "6829c878ecd24ff0ae41b4668c7e9d0f11b66942", "versionType": "git"}, {"lessThan": "8f4127a93cf60d561ad39849a9ac763ba0e14db5", "status": "affected", "version": "6829c878ecd24ff0ae41b4668c7e9d0f11b66942", "versionType": "git"}, {"lessThan": "d5e4586546974179feca305a94e07fac3e9727fe", "status": "affected", "version": "6829c878ecd24ff0ae41b4668c7e9d0f11b66942", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/wireless/mlme.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "2.6.32"}, {"lessThan": "2.6.32", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.15.*", "status": "unaffected", "version": "5.15.222", "versionType": "semver"}, {"lessThanOrEqual": "6.1.*", "status": "unaffected", "version": "6.1.189", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.158", "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"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: validate rx/tx MLME callback frame lengths before access\n\ncfg80211_rx_mlme_mgmt() and cfg80211_tx_mlme_mgmt() call tracepoints\nbefore rejecting frames shorter than the frame-control field. After\nthat, they only require len >= 2 before dispatching into subtype\nhandlers that assume their fixed fields are present.\n\nThe frames that trip this are not shorter than 2 bytes; they are short\nrelative to their subtype. mwifiex is a concrete in-tree example on the\nlength side: mwifiex_process_mgmt_packet() only requires a 4-address\nieee80211_hdr plus the 2-byte firmware length prefix before handing the\nframe to cfg80211_rx_mlme_mgmt(). After stripping the length prefix and\nremoving addr4, pkt_len can be exactly 24: a bare 3-address management\nheader with no reason-code body. The existing WARN_ON(len < 2) does not\nfire on such a frame, and cfg80211_process_deauth() then reads\nu.deauth.reason_code as a two-byte access starting at offset 24,\nimmediately past the 24-byte buffer.\n\nAdd a frame-control length gate, then validate each subtype's minimum\nframe size in an if/else-if chain that mirrors the dispatch logic. Trace\nonly after the frame is known to be well-formed.\n\nSide effects of this change:\n - The WARN_ON(len < 2) is dropped. It only guarded the frame_control\n read, never the subtype fixed fields, and it does not fire on the\n frames that actually trigger the out-of-bounds read (which are >= 2).\n The len >= 2 check is kept as the guard before dereferencing\n frame_control, but without the warning: these are exported callbacks\n and a malformed frame from a driver should be dropped silently rather\n than backtraced.\n - cfg80211_tx_mlme_mgmt() previously routed every non-deauth subtype\n through disassociation handling; it now silently ignores unrecognised\n subtypes."}], "id": "CVE-2026-93805", "lastModified": "2026-10-03T11:17:50.190", "metrics": {}, "published": "2026-09-24T17:17:13.460", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0ec738a0d361d7eb37188117166d201f9df622d3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6bdf4dcff98df634e04ebf99f52027a48d7f78ff"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/6eb4bd50be53f5afbabb3a3b5153276e08fa7a4a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8f4127a93cf60d561ad39849a9ac763ba0e14db5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ce2a3be6909462f49c34de96be71f0ad5f0d573f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d5e4586546974179feca305a94e07fac3e9727fe"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: wifi: cfg80211: validate rx/tx MLME callback frame lengths before access", "id": "2540380", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2540380"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nwifi: cfg80211: validate rx/tx MLME callback frame lengths before access\ncfg80211_rx_mlme_mgmt() and cfg80211_tx_mlme_mgmt() call tracepoints\nbefore rejecting frames shorter than the frame-control field. After\nthat, they only require len >= 2 before dispatching into subtype\nhandlers that assume their fixed fields are present.\nThe frames that trip this are not shorter than 2 bytes; they are short\nrelative to their subtype. mwifiex is a concrete in-tree example on the\nlength side: mwifiex_process_mgmt_packet() only requires a 4-address\nieee80211_hdr plus the 2-byte firmware length prefix before handing the\nframe to cfg80211_rx_mlme_mgmt(). After stripping the length prefix and\nremoving addr4, pkt_len can be exactly 24: a bare 3-address management\nheader with no reason-code body. The existing WARN_ON(len < 2) does not\nfire on such a frame, and cfg80211_process_deauth() then reads\nu.deauth.reason_code as a two-byte access starting at offset 24,\nimmediately past the 24-byte buffer.\nAdd a frame-control length gate, then validate each subtype's minimum\nframe size in an if/else-if chain that mirrors the dispatch logic. Trace\nonly after the frame is known to be well-formed.\nSide effects of this change:\n- The WARN_ON(len < 2) is dropped. It only guarded the frame_control\nread, never the subtype fixed fields, and it does not fire on the\nframes that actually trigger the out-of-bounds read (which are >= 2).\nThe len >= 2 check is kept as the guard before dereferencing\nframe_control, but without the warning: these are exported callbacks\nand a malformed frame from a driver should be dropped silently rather\nthan backtraced.\n- cfg80211_tx_mlme_mgmt() previously routed every non-deauth subtype\nthrough disassociation handling; it now silently ignores unrecognised\nsubtypes.", "A flaw was found in the Linux kernel's cfg80211 wireless subsystem. The kernel fails to properly validate the length of wireless management frames before accessing subtype-specific data fields. An attacker within wireless range could exploit this flaw by transmitting malformed, truncated management frames, causing an out-of-bounds read. This can result in a system crash, causing a Denial of Service (DoS), or potentially lead to the exposure of sensitive kernel memory."], "name": "CVE-2026-93805", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Fix deferred", "package_name": "openshift/ose-rhel-coreos-9", "product_name": "Red Hat OpenShift Container Platform 4"}], "public_date": "2026-09-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-93805\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-93805\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-93805.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,0ec738a0d361d7eb37188117166d201f9df622d3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,8f4127a93cf60d561ad39849a9ac763ba0e14db5)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[1da177e4c3f41524e886b7f1b8a0c1fc7321cac2,d5e4586546974179feca305a94e07fac3e9727fe)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.12.111)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,6.18.53)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.111,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.53,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-09-24T20:30:17.880293+00:00", "updated": "2026-10-01T16:45:09.988154+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}