CVE-2026-98340

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98340", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.342Z", "datePublished": "2026-10-06T08:46:30.796Z", "dateUpdated": "2026-10-19T09:17:51.387Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:17:51.387Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: cfg80211: only group hidden BSSes with beacon entries\n\nWhen a probe response for an unknown BSS comes in, __cfg80211_bss_update()\nlooks for an existing entry with the same BSSID and a hidden (zero-length\nor NUL-filled) SSID, and if it finds one it groups them, using the beacon\nIEs from the existing entry.\n\nBut that could find another entry without a beacon, if it was also from a\nprobe response (with SSID), so there's a group without beacon elements.\n\nIf a beacon with a hidden SSID for that BSSID arrives later,\ncfg80211_combine_bsses() goes looking for the probe response entries that\nbelong to it - i.e. entries with the same BSSID and channel that have no\nbeacon IEs - and finds those two. They are already grouped with each\nother, so it hits its\n\n WARN_ON_ONCE(bss->pub.hidden_beacon_bss)\n WARN_ON_ONCE(!list_empty(&bss->hidden_list))\n\nwhich are there because an entry without beacon elements is not supposed\nto be part of a group yet.\n\nOnly combine entries when a beacon was already received, ones that are\nkept separate will be combined when a beacon arrives."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/wireless/scan.c"], "versions": [{"version": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc", "lessThan": "4cd6a518ce7527284bbc9baab5fa2453a7d477c2", "status": "affected", "versionType": "git"}, {"version": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc", "lessThan": "74ed0d992f392c75e1969415527e06df3f7a4034", "status": "affected", "versionType": "git"}, {"version": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc", "lessThan": "3658093df69849daf4f813a8f087f358e13be203", "status": "affected", "versionType": "git"}, {"version": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc", "lessThan": "73365b81630b57e1a1f9d50dc87281797855c2ac", "status": "affected", "versionType": "git"}, {"version": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc", "lessThan": "7405dd19bda4537a2843637d8d7bed1efd4776cf", "status": "affected", "versionType": "git"}, {"version": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc", "lessThan": "86235be788094131912e9bd8412b358d91d99f49", "status": "affected", "versionType": "git"}, {"version": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc", "lessThan": "332ea1502c46f53375cb109fa82bfaff818f3a41", "status": "affected", "versionType": "git"}, {"version": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc", "lessThan": "068843ed0902c552a13860c5ec6b2ca65b57a065", "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/scan.c"], "versions": [{"version": "3.9", "status": "affected"}, {"version": "0", "lessThan": "3.9", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.271", "lessThanOrEqual": "5.10.*", "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": "6.12.112", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.54", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2.8", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.3", "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": "3.9", "versionEndExcluding": "5.10.271"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "5.15.222"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "6.1.189"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "6.18.54"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "7.2.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.9", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4cd6a518ce7527284bbc9baab5fa2453a7d477c2"}, {"url": "https://git.kernel.org/stable/c/74ed0d992f392c75e1969415527e06df3f7a4034"}, {"url": "https://git.kernel.org/stable/c/3658093df69849daf4f813a8f087f358e13be203"}, {"url": "https://git.kernel.org/stable/c/73365b81630b57e1a1f9d50dc87281797855c2ac"}, {"url": "https://git.kernel.org/stable/c/7405dd19bda4537a2843637d8d7bed1efd4776cf"}, {"url": "https://git.kernel.org/stable/c/86235be788094131912e9bd8412b358d91d99f49"}, {"url": "https://git.kernel.org/stable/c/332ea1502c46f53375cb109fa82bfaff818f3a41"}, {"url": "https://git.kernel.org/stable/c/068843ed0902c552a13860c5ec6b2ca65b57a065"}], "title": "wifi: cfg80211: only group hidden BSSes with beacon entries", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/wireless/scan.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "4cd6a518ce7527284bbc9baab5fa2453a7d477c2", "status": "affected", "version": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc", "versionType": "git"}, {"lessThan": "74ed0d992f392c75e1969415527e06df3f7a4034", "status": "affected", "version": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc", "versionType": "git"}, {"lessThan": "3658093df69849daf4f813a8f087f358e13be203", "status": "affected", "version": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc", "versionType": "git"}, {"lessThan": "73365b81630b57e1a1f9d50dc87281797855c2ac", "status": "affected", "version": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc", "versionType": "git"}, {"lessThan": "7405dd19bda4537a2843637d8d7bed1efd4776cf", "status": "affected", "version": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc", "versionType": "git"}, {"lessThan": "86235be788094131912e9bd8412b358d91d99f49", "status": "affected", "version": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc", "versionType": "git"}, {"lessThan": "332ea1502c46f53375cb109fa82bfaff818f3a41", "status": "affected", "version": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc", "versionType": "git"}, {"lessThan": "068843ed0902c552a13860c5ec6b2ca65b57a065", "status": "affected", "version": "4593c4cbe1c96b3995727dc42f6aa103f4ff5afc", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/wireless/scan.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.9"}, {"lessThan": "3.9", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "5.10.*", "status": "unaffected", "version": "5.10.271", "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": "6.12.112", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.54", "versionType": "semver"}, {"lessThanOrEqual": "7.2.*", "status": "unaffected", "version": "7.2.8", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.3", "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: only group hidden BSSes with beacon entries\n\nWhen a probe response for an unknown BSS comes in, __cfg80211_bss_update()\nlooks for an existing entry with the same BSSID and a hidden (zero-length\nor NUL-filled) SSID, and if it finds one it groups them, using the beacon\nIEs from the existing entry.\n\nBut that could find another entry without a beacon, if it was also from a\nprobe response (with SSID), so there's a group without beacon elements.\n\nIf a beacon with a hidden SSID for that BSSID arrives later,\ncfg80211_combine_bsses() goes looking for the probe response entries that\nbelong to it - i.e. entries with the same BSSID and channel that have no\nbeacon IEs - and finds those two. They are already grouped with each\nother, so it hits its\n\n WARN_ON_ONCE(bss->pub.hidden_beacon_bss)\n WARN_ON_ONCE(!list_empty(&bss->hidden_list))\n\nwhich are there because an entry without beacon elements is not supposed\nto be part of a group yet.\n\nOnly combine entries when a beacon was already received, ones that are\nkept separate will be combined when a beacon arrives."}], "id": "CVE-2026-98340", "lastModified": "2026-10-19T10:18:36.320", "metrics": {}, "published": "2026-10-06T09:18:26.720", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/068843ed0902c552a13860c5ec6b2ca65b57a065"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/332ea1502c46f53375cb109fa82bfaff818f3a41"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/3658093df69849daf4f813a8f087f358e13be203"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4cd6a518ce7527284bbc9baab5fa2453a7d477c2"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/73365b81630b57e1a1f9d50dc87281797855c2ac"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/7405dd19bda4537a2843637d8d7bed1efd4776cf"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/74ed0d992f392c75e1969415527e06df3f7a4034"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/86235be788094131912e9bd8412b358d91d99f49"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: wifi: cfg80211: only group hidden BSSes with beacon entries", "id": "2546412", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2546412"}, "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-617", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nwifi: cfg80211: only group hidden BSSes with beacon entries\nWhen a probe response for an unknown BSS comes in, __cfg80211_bss_update()\nlooks for an existing entry with the same BSSID and a hidden (zero-length\nor NUL-filled) SSID, and if it finds one it groups them, using the beacon\nIEs from the existing entry.\nBut that could find another entry without a beacon, if it was also from a\nprobe response (with SSID), so there's a group without beacon elements.\nIf a beacon with a hidden SSID for that BSSID arrives later,\ncfg80211_combine_bsses() goes looking for the probe response entries that\nbelong to it - i.e. entries with the same BSSID and channel that have no\nbeacon IEs - and finds those two. They are already grouped with each\nother, so it hits its\nWARN_ON_ONCE(bss->pub.hidden_beacon_bss)\nWARN_ON_ONCE(!list_empty(&bss->hidden_list))\nwhich are there because an entry without beacon elements is not supposed\nto be part of a group yet.\nOnly combine entries when a beacon was already received, ones that are\nkept separate will be combined when a beacon arrives.", "A flaw was found in the Linux kernel's cfg80211 wireless subsystem. When processing wireless scan responses, the kernel incorrectly groups network entries for hidden networks before receiving the necessary beacon data. A nearby attacker could exploit this vulnerability by transmitting specially crafted wireless frames, triggering kernel assertion warnings and potentially causing system instability or a Denial of Service (DoS)."], "name": "CVE-2026-98340", "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": "2026-10-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-98340\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98340\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98340.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4593c4cbe1c96b3995727dc42f6aa103f4ff5afc,4cd6a518ce7527284bbc9baab5fa2453a7d477c2)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4593c4cbe1c96b3995727dc42f6aa103f4ff5afc,74ed0d992f392c75e1969415527e06df3f7a4034)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4593c4cbe1c96b3995727dc42f6aa103f4ff5afc,3658093df69849daf4f813a8f087f358e13be203)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4593c4cbe1c96b3995727dc42f6aa103f4ff5afc,73365b81630b57e1a1f9d50dc87281797855c2ac)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4593c4cbe1c96b3995727dc42f6aa103f4ff5afc,7405dd19bda4537a2843637d8d7bed1efd4776cf)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4593c4cbe1c96b3995727dc42f6aa103f4ff5afc,86235be788094131912e9bd8412b358d91d99f49)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4593c4cbe1c96b3995727dc42f6aa103f4ff5afc,332ea1502c46f53375cb109fa82bfaff818f3a41)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4593c4cbe1c96b3995727dc42f6aa103f4ff5afc,068843ed0902c552a13860c5ec6b2ca65b57a065)"}}], "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": "3.9"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,3.9)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.271,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.222,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.189,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.158,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.112,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.54,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.2.8,7.3.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "7.3-rc4"}}], "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": "2026-10-06T15:45:02.272589+00:00", "updated": "2026-10-11T05:00:12.522794+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}