CVE-2026-64030

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The\nunsolicited-notification path (dialog_token = 0) is reachable any time\nEPCS is already enabled, without any prior client request.\n\nsdata->link[15] reads into the first word of sdata->activate_links_work\n(a wiphy_work whose embedded list_head is non-NULL after INIT_LIST_HEAD),\nso the NULL check on the result does not catch the invalid access. The\ngarbage pointer is then passed to ieee80211_sta_wmm_params(), which\ndereferences link->sdata and crashes the kernel.\n\nThe same class of bug was fixed for ieee80211_ml_reconfiguration() by\ncommit 162d331d833d (\"wifi: mac80211: bounds-check link_id in\nieee80211_ml_reconfiguration\")."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:A - A malicious or compromised WiFi 7 AP transmits a crafted EPCS Enable Response action frame over the wireless link; exploitation requires proximity on the same WiFi segment, not remote internet reachability.\nAC:L - Once a victim WiFi 7 MLD station is associated with an EPCS-capable AP, the attacker reliably triggers the bug by setting link_id=15 in a PER_STA_PROFILE subelement, including via the unsolicited notification path (dialog_token=0) when EPCS is already enabled.\nPR:N - The attacker acts as the associated AP sending forged management frames and needs no local privileges, accounts, or capabilities on the victim system.\nUI:N - After association and EPCS enablement, the kernel processes the malicious frame automatically with no further victim action required at exploit time.\nS:U - Impact is confined to kernel memory corruption and crash on the victim station; it does not cross a VM, IOMMU, or sandbox security boundary.\nC:H - Out-of-bounds read of sdata->link[15] pulls a kernel pointer from adjacent sdata->activate_links_work memory, and the resulting bogus pointer is dereferenced as ieee80211_link_data, constituting an unbounded kernel memory read primitive.\nI:H - The out-of-bounds pointer is used as a valid ieee80211_link_data structure; if execution proceeds past the initial dereference, _ieee80211_sta_wmm_params() can write to link->tx_conf[] at incorrect offsets, enabling potential kernel memory corruption beyond a simple fault.\nA:H - The invalid pointer dereference in ieee80211_sta_wmm_params() causes a kernel oops/panic, resulting in complete loss of availability for the victim system."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/mac80211/mlme.c"], "versions": [{"version": "de86c5f60839dc0d771711a848b4f55ad3f90844", "lessThan": "2d8379834800c30602f24c71ab7c40f5fe84d200", "status": "affected", "versionType": "git"}, {"version": "de86c5f60839dc0d771711a848b4f55ad3f90844", "lessThan": "863f1f02a3bd70dbd857b8ac4070292fde8cb4e2", "status": "affected", "versionType": "git"}, {"version": "de86c5f60839dc0d771711a848b4f55ad3f90844", "lessThan": "f718506edd2d9c6a308ded9d13c632bf7b7d5a2c", "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/mac80211/mlme.c"], "versions": [{"version": "6.15", "status": "affected"}, {"version": "0", "lessThan": "6.15", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.34", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.11", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "6.15", "versionEndExcluding": "6.18.34"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.0.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.15", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/2d8379834800c30602f24c71ab7c40f5fe84d200"}, {"url": "https://git.kernel.org/stable/c/863f1f02a3bd70dbd857b8ac4070292fde8cb4e2"}, {"url": "https://git.kernel.org/stable/c/f718506edd2d9c6a308ded9d13c632bf7b7d5a2c"}], "title": "wifi: mac80211: bounds-check link_id in ieee80211_ml_epcs", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-64030", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:35:37.195700Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-125", "description": "CWE-125 Out-of-bounds Read"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-19T20:28:09.581Z"}}]}}

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The\nunsolicited-notification path (dialog_token = 0) is reachable any time\nEPCS is already enabled, without any prior client request.\n\nsdata->link[15] reads into the first word of sdata->activate_links_work\n(a wiphy_work whose embedded list_head is non-NULL after INIT_LIST_HEAD),\nso the NULL check on the result does not catch the invalid access. The\ngarbage pointer is then passed to ieee80211_sta_wmm_params(), which\ndereferences link->sdata and crashes the kernel.\n\nThe same class of bug was fixed for ieee80211_ml_reconfiguration() by\ncommit 162d331d833d (\"wifi: mac80211: bounds-check link_id in\nieee80211_ml_reconfiguration\")."}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "6.18.34", "versionStartIncluding": "6.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.0.11", "versionStartIncluding": "6.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "7.1", "versionStartIncluding": "6.15"}], "operator": "OR"}]}], "providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:38:24.204Z"}}}, "cveMetadata": {"cveId": "CVE-2026-64030", "state": "PUBLISHED", "dateUpdated": "2026-10-16T15:42:19.792Z", "dateReserved": "2026-07-19T07:54:57.028Z", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "datePublished": "2026-07-19T15:39:20.982Z", "assignerShortName": "Linux"}, "dataVersion": "5.2"}

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The\nunsolicited-notification path (dialog_token = 0) is reachable any time\nEPCS is already enabled, without any prior client request.\n\nsdata->link[15] reads into the first word of sdata->activate_links_work\n(a wiphy_work whose embedded list_head is non-NULL after INIT_LIST_HEAD),\nso the NULL check on the result does not catch the invalid access. The\ngarbage pointer is then passed to ieee80211_sta_wmm_params(), which\ndereferences link->sdata and crashes the kernel.\n\nThe same class of bug was fixed for ieee80211_ml_reconfiguration() by\ncommit 162d331d833d (\"wifi: mac80211: bounds-check link_id in\nieee80211_ml_reconfiguration\")."}], "id": "CVE-2026-64030", "lastModified": "2026-10-19T21:17:20.587", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-64030", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:35:37.195700Z", "version": "2.0.3"}}]}, "published": "2026-07-19T16:17:43.147", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/2d8379834800c30602f24c71ab7c40f5fe84d200"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/863f1f02a3bd70dbd857b8ac4070292fde8cb4e2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f718506edd2d9c6a308ded9d13c632bf7b7d5a2c"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-125"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: wifi: mac80211: bounds-check link_id in ieee80211_ml_epcs", "id": "2502460", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2502460"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.0", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-476", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nwifi: mac80211: bounds-check link_id in ieee80211_ml_epcs\nIEEE80211_MLE_STA_EPCS_CONTROL_LINK_ID is 0x000f, so link_id extracted\nfrom a PRIO_ACCESS ML element PER_STA_PROFILE subelement can be 0..15.\nsdata->link[] has IEEE80211_MLD_MAX_NUM_LINKS (15) entries (indices 0..14),\nmaking index 15 out-of-bounds.\nA connected WiFi 7 AP can trigger this by sending an EPCS Enable Response\naction frame with a PER_STA_PROFILE subelement where link_id = 15. The\nunsolicited-notification path (dialog_token = 0) is reachable any time\nEPCS is already enabled, without any prior client request.\nsdata->link[15] reads into the first word of sdata->activate_links_work\n(a wiphy_work whose embedded list_head is non-NULL after INIT_LIST_HEAD),\nso the NULL check on the result does not catch the invalid access. The\ngarbage pointer is then passed to ieee80211_sta_wmm_params(), which\ndereferences link->sdata and crashes the kernel.\nThe same class of bug was fixed for ieee80211_ml_reconfiguration() by\ncommit 162d331d833d (\"wifi: mac80211: bounds-check link_id in\nieee80211_ml_reconfiguration\").", "A flaw was found in the Linux kernel's Wi-Fi (mac80211) component. A connected WiFi 7 Access Point (AP) can trigger an out-of-bounds write by sending a specially crafted EPCS Enable Response action frame. This vulnerability can lead to a kernel crash, resulting in a Denial of Service (DoS) for the affected system."], "name": "CVE-2026-64030", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Under investigation", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:hummingbird:1", "fix_state": "Not affected", "impact": "important", "package_name": "erlang27", "product_name": "Red Hat Hardened Images"}], "public_date": "2026-07-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-64030\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-64030\nhttps://lore.kernel.org/linux-cve-announce/2026071903-CVE-2026-64030-51b6@gregkh/T"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[de86c5f60839dc0d771711a848b4f55ad3f90844,2d8379834800c30602f24c71ab7c40f5fe84d200)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[de86c5f60839dc0d771711a848b4f55ad3f90844,863f1f02a3bd70dbd857b8ac4070292fde8cb4e2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[de86c5f60839dc0d771711a848b4f55ad3f90844,f718506edd2d9c6a308ded9d13c632bf7b7d5a2c)"}}], "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": "affected", "versions": {"scheme": "generic", "value": "6.15"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.15)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.34,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.11,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "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": "2026-07-21T09:00:03.294642+00:00", "updated": "2026-10-17T10:00:08.624856+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}