CVE-2026-46125

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Any \"new_sta\" is\nalready being removed, so that doesn't need changes.\n\nThis fixes a use-after-free/double-free in debugfs if that's\nenabled, because a vif going from MLD (and to MLD, but that's\nnot relevant here) recreates its entire debugfs."}], "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 - The bug is in mac80211 station-side MLME, triggered by a malicious/rogue AP that the station attempts an MLO association with; WiFi requires the attacker to be within radio range (same wireless segment).\nAC:L - A rogue AP can reliably let authentication create the station and then craft association/channel parameters that fail connection prep on the MLO path, repeatably; the required CONFIG_MAC80211_DEBUGFS is commonly enabled.\nPR:N - 802.11 authentication/association management frames are processed before any credential proof (4-way handshake/SAE), so a rogue AP reaches this path without holding any credentials on the victim.\nUI:N - Stations auto-reconnect to saved networks, so an attacker spoofing a known SSID drives the connection (and the failing MLO assoc) with no user action.\nS:U - The corruption stays within the kernel's own memory/security authority with no boundary crossing such as VM or IOMMU escape.\nC:H - A use-after-free over the freed station/link-debugfs objects can be leveraged for attacker-controlled reads of kernel memory.\nI:H - The use-after-free/double-free enables heap grooming and write primitives that can corrupt adjacent kernel state and hijack control flow.\nA:H - The use-after-free/double-free reliably causes kernel oops/panic, a full denial of service."}]}], "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": 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Linux kernel's mac80211 Wi-Fi subsystem. When Multi-Link Operation (MLO) connection preparation fails, the system may not correctly remove the associated station. This can lead to a use-after-free or double-free vulnerability in the debugfs component, potentially causing system instability or unexpected behavior."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-825", "description": "Expired Pointer Dereference"}]}], "providerMetadata": {"orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "shortName": "redhat-SADP", "dateUpdated": "2026-07-15T00:51:27.525Z"}}, {"affected": [{"vendor": "Siemens", "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem", "versions": [{"status": "affected", "version": "0", "lessThan": "*", "versionType": "custom"}], "defaultStatus": "unknown"}], "x_adpType": "supplier", "references": [{"url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"}], "providerMetadata": {"orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-10-15T01:20:41.563Z"}}, {"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-46125", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-10-16T15:20:08.786122Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-416", "description": "CWE-416 Use After Free"}]}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T15:20:09.369Z"}}], "cna": {"title": "wifi: mac80211: remove station if connection prep fails", "metrics": [{"cvssV3_1": {"version": "3.1", "baseScore": 8.8, "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}, "scenarios": [{"lang": "en", "value": "AV:A - The bug is in mac80211 station-side MLME, triggered by a malicious/rogue AP that the station attempts an MLO association with; WiFi requires the attacker to be within radio range (same wireless segment).\nAC:L - A rogue AP can reliably let authentication create the station and then craft association/channel parameters that fail connection prep on the MLO path, repeatably; the required CONFIG_MAC80211_DEBUGFS is commonly enabled.\nPR:N - 802.11 authentication/association management frames are processed before any credential proof (4-way handshake/SAE), so a rogue AP reaches this path without holding any credentials on the victim.\nUI:N - Stations auto-reconnect to saved networks, so an attacker spoofing a known SSID drives the connection (and the failing MLO assoc) with no user action.\nS:U - The corruption stays within the kernel's own memory/security authority with no boundary crossing such as VM or IOMMU escape.\nC:H - A use-after-free over the freed station/link-debugfs objects can be leveraged for attacker-controlled reads of kernel memory.\nI:H - The use-after-free/double-free enables heap grooming and write primitives that can corrupt adjacent kernel state and hijack control flow.\nA:H - The use-after-free/double-free reliably causes kernel oops/panic, a full denial of service."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "81151ce462e533551f3284bfdb8e0f461c9220e6", "lessThan": "18fed0a209500bfea5c4c08609ec93855e4e500b", "versionType": "git"}, {"status": "affected", "version": "81151ce462e533551f3284bfdb8e0f461c9220e6", "lessThan": "fe75fa1ac9a92990f7fc3d34b17808fd933071b2", "versionType": "git"}, {"status": "affected", "version": "81151ce462e533551f3284bfdb8e0f461c9220e6", "lessThan": "afcbaed89cdc1a001b43270cbf5394bb4804270a", "versionType": "git"}, {"status": "affected", "version": "81151ce462e533551f3284bfdb8e0f461c9220e6", "lessThan": "9e28654f79f443bca9b29ff3ae7cf18abfba58a0", "versionType": "git"}, {"status": "affected", "version": "81151ce462e533551f3284bfdb8e0f461c9220e6", "lessThan": "1c2b72ea89882aeb948340498391e69c58d466f1", "versionType": "git"}, {"status": "affected", "version": "81151ce462e533551f3284bfdb8e0f461c9220e6", "lessThan": "283fc9e44ff5b5ac967439b4951b80bd4299f4e4", "versionType": "git"}], "programFiles": ["net/mac80211/mlme.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.0"}, {"status": "unaffected", "version": "0", "lessThan": "6.0", "versionType": "semver"}, {"status": "unaffected", "version": "6.1.176", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.140", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.88", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.30", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "7.0.7", "versionType": "semver", "lessThanOrEqual": "7.0.*"}, {"status": "unaffected", "version": "7.1", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["net/mac80211/mlme.c"], "defaultStatus": "affected"}], "references": [{"url": "https://git.kernel.org/stable/c/18fed0a209500bfea5c4c08609ec93855e4e500b"}, {"url": "https://git.kernel.org/stable/c/fe75fa1ac9a92990f7fc3d34b17808fd933071b2"}, {"url": "https://git.kernel.org/stable/c/afcbaed89cdc1a001b43270cbf5394bb4804270a"}, {"url": "https://git.kernel.org/stable/c/9e28654f79f443bca9b29ff3ae7cf18abfba58a0"}, {"url": "https://git.kernel.org/stable/c/1c2b72ea89882aeb948340498391e69c58d466f1"}, {"url": "https://git.kernel.org/stable/c/283fc9e44ff5b5ac967439b4951b80bd4299f4e4"}], "x_generator": {"engine": "bippy-1.2.0"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: remove station if connection prep fails\n\nIf connection preparation fails for MLO connections, then the\ninterface is completely reset to non-MLD. 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In this case, we must\nnot keep the station since it's related to the link of the vif\nbeing removed. Delete an existing station. Any \"new_sta\" is\nalready being removed, so that doesn't need changes.\n\nThis fixes a use-after-free/double-free in debugfs if that's\nenabled, because a vif going from MLD (and to MLD, but that's\nnot relevant here) recreates its entire debugfs."}], "id": "CVE-2026-46125", "lastModified": "2026-10-19T20:18:33.507", "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"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 6.8, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 0.9, "impactScore": 5.9, "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-46125", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:20:08.786122Z", "version": "2.0.3"}}]}, "published": "2026-05-28T10:16:28.047", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/18fed0a209500bfea5c4c08609ec93855e4e500b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1c2b72ea89882aeb948340498391e69c58d466f1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/283fc9e44ff5b5ac967439b4951b80bd4299f4e4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9e28654f79f443bca9b29ff3ae7cf18abfba58a0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/afcbaed89cdc1a001b43270cbf5394bb4804270a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fe75fa1ac9a92990f7fc3d34b17808fd933071b2"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:26427"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:26428"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:26462"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:26515"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:26563"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:27288"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:27708"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:27731"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:27735"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:27789"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/security/cve/CVE-2026-46125"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482608"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-784472.html"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46125.json"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Undergoing Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-416"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-825"}], "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: wifi: mac80211: remove station if connection prep fails", "id": "2482608", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2482608"}, "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-825", "details": ["A flaw was found in the Linux kernel's mac80211 Wi-Fi subsystem. When Multi-Link Operation (MLO) connection preparation fails, the system may not correctly remove the associated station. This can lead to a use-after-free or double-free vulnerability in the debugfs component, potentially causing system instability or unexpected behavior."], "name": "CVE-2026-46125", "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": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "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"}], "public_date": "2026-05-28T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-46125\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-46125\nhttps://lore.kernel.org/linux-cve-announce/2026052816-CVE-2026-46125-b5d0@gregkh/T"], "threat_severity": "Important"}

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