CVE-2026-98331

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98331", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.341Z", "datePublished": "2026-10-06T08:46:23.481Z", "dateUpdated": "2026-10-19T09:17:41.508Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:17:41.508Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: unlist vifs when their netdev is unregistered\n\nmac80211 only removes vifs from the local->interfaces list when\nan interface is removed via ieee80211_if_remove(), before it\nunregisters the netdev. However, it's possible for a netdev to\nbe unregistered without going through that: When the netns that\nholds the wiphy is destroyed, the wiphy is supposed to move to\nthe init_ns, but that can run into allocation failures.\n\nThen, mac80211 has an interface listed that doesn't exist, and\nwill eventually hit\n\n BUG: failure at net/wireless/core.h:141/wiphy_to_rdev()!\n ...\n _cfg80211_unregister_wdev+0x24/0x36a [cfg80211]\n cfg80211_unregister_wdev+0x15/0x1d [cfg80211]\n ieee80211_remove_interfaces+0x1ff/0x257 [mac80211]\n ieee80211_unregister_hw+0x73/0x1d1 [mac80211]\n mac80211_hwsim_del_radio+0x114/0x166 [mac80211_hwsim]\n\nRemove the interface from the list in ->ndo_uninit if it's still\naround to avoid this."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The trigger is local: tearing down a netns that holds a mac80211 wiphy runs cfg80211_pernet_exit()->cfg80211_switch_netns(). When dev_change_net_namespace() fails there, default_device_exit_batch() unregisters the netdev while ieee80211_uninit() leaves its sdata on local->interfaces. No WiFi frame supplies the failing state.\nAC:H - It needs a wiphy already moved into an attacker-controlled netns (an admin step), plus a failed move back. The attacker can force the failure: an altname on the wlan netdev that clashes with an init_net name makes __dev_change_net_namespace() return -EEXIST, because cfg80211 doesn't strip altnames. The rare alternative is an allocation failure.\nPR:L - With a phy delegated to a container, root in that user-namespace-owned netns, which is unprivileged on the host, can add the altname via RTM_NEWLINKPROP and destroy the netns. Moving a phy out of init_net yourself needs init-ns CAP_NET_ADMIN, and hwsim radios made in a user netns are deleted by hwsim_exit_net() before cfg80211 runs.\nUI:N - The container root adds the altname and exits the namespace on their own. No other user has to do anything.\nS:U - This is memory corruption in the host kernel's mac80211 interface list. Exploiting it is ordinary kernel privilege escalation within the same kernel authority; no hypervisor or IOMMU boundary is involved.\nC:H - The netdev is freed via needs_free_netdev, but its sdata stays on local->interfaces. Every received frame then makes __ieee80211_rx_handle_packet() read the freed sdata through list_for_each_entry_rcu(), which gives a use-after-free read of an object an attacker can reallocate.\nI:H - Later removal of a neighbouring interface (list_del_rcu) and ieee80211_remove_interfaces() write into and dereference the stale sdata. That is a use-after-free write that heap reallocation could turn into memory corruption.\nA:H - The dangling entry crashes the kernel: the commit shows a BUG in wiphy_to_rdev() reached from ieee80211_remove_interfaces() during ieee80211_unregister_hw(), and frame RX can touch freed memory."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/mac80211/iface.c"], "versions": [{"version": "463d018323851a608eef52a9427b0585005c647f", "lessThan": "a22c02863439993095acd0c3db97fa53cd515f4f", "status": "affected", "versionType": "git"}, {"version": "463d018323851a608eef52a9427b0585005c647f", "lessThan": "20a56e96a6f7b4dfbd13f8732fd2673409fc7ba0", "status": "affected", "versionType": "git"}, {"version": "463d018323851a608eef52a9427b0585005c647f", "lessThan": "b735ad1a9aca6080192c1316cf2706e5e1318762", "status": "affected", "versionType": "git"}, {"version": "463d018323851a608eef52a9427b0585005c647f", "lessThan": "d45bf731ec7085d2cc2c5d179d3b3b6c743d4fb1", "status": "affected", "versionType": "git"}, {"version": "463d018323851a608eef52a9427b0585005c647f", "lessThan": "821bab0456dfca12acef6df702c8f2477d313227", "status": "affected", "versionType": "git"}, {"version": "463d018323851a608eef52a9427b0585005c647f", "lessThan": "eee2efd82867b623982ac51925b5a1812a74c50d", "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/iface.c"], "versions": [{"version": "2.6.32", "status": "affected"}, {"version": "0", "lessThan": "2.6.32", "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": "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": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "6.18.54"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "7.2.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.32", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a22c02863439993095acd0c3db97fa53cd515f4f"}, {"url": "https://git.kernel.org/stable/c/20a56e96a6f7b4dfbd13f8732fd2673409fc7ba0"}, {"url": "https://git.kernel.org/stable/c/b735ad1a9aca6080192c1316cf2706e5e1318762"}, {"url": "https://git.kernel.org/stable/c/d45bf731ec7085d2cc2c5d179d3b3b6c743d4fb1"}, {"url": "https://git.kernel.org/stable/c/821bab0456dfca12acef6df702c8f2477d313227"}, {"url": "https://git.kernel.org/stable/c/eee2efd82867b623982ac51925b5a1812a74c50d"}], "title": "wifi: mac80211: unlist vifs when their netdev is unregistered", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/mac80211/iface.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "a22c02863439993095acd0c3db97fa53cd515f4f", "status": "affected", "version": "463d018323851a608eef52a9427b0585005c647f", "versionType": "git"}, {"lessThan": "20a56e96a6f7b4dfbd13f8732fd2673409fc7ba0", "status": "affected", "version": "463d018323851a608eef52a9427b0585005c647f", "versionType": "git"}, {"lessThan": "b735ad1a9aca6080192c1316cf2706e5e1318762", "status": "affected", "version": "463d018323851a608eef52a9427b0585005c647f", "versionType": "git"}, {"lessThan": "d45bf731ec7085d2cc2c5d179d3b3b6c743d4fb1", "status": "affected", "version": "463d018323851a608eef52a9427b0585005c647f", "versionType": "git"}, {"lessThan": "821bab0456dfca12acef6df702c8f2477d313227", "status": "affected", "version": "463d018323851a608eef52a9427b0585005c647f", "versionType": "git"}, {"lessThan": "eee2efd82867b623982ac51925b5a1812a74c50d", "status": "affected", "version": "463d018323851a608eef52a9427b0585005c647f", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/mac80211/iface.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": "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: mac80211: unlist vifs when their netdev is unregistered\n\nmac80211 only removes vifs from the local->interfaces list when\nan interface is removed via ieee80211_if_remove(), before it\nunregisters the netdev. However, it's possible for a netdev to\nbe unregistered without going through that: When the netns that\nholds the wiphy is destroyed, the wiphy is supposed to move to\nthe init_ns, but that can run into allocation failures.\n\nThen, mac80211 has an interface listed that doesn't exist, and\nwill eventually hit\n\n BUG: failure at net/wireless/core.h:141/wiphy_to_rdev()!\n ...\n _cfg80211_unregister_wdev+0x24/0x36a [cfg80211]\n cfg80211_unregister_wdev+0x15/0x1d [cfg80211]\n ieee80211_remove_interfaces+0x1ff/0x257 [mac80211]\n ieee80211_unregister_hw+0x73/0x1d1 [mac80211]\n mac80211_hwsim_del_radio+0x114/0x166 [mac80211_hwsim]\n\nRemove the interface from the list in ->ndo_uninit if it's still\naround to avoid this."}], "id": "CVE-2026-98331", "lastModified": "2026-10-19T10:18:35.267", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.0, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.0, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-10-06T09:18:25.517", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/20a56e96a6f7b4dfbd13f8732fd2673409fc7ba0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/821bab0456dfca12acef6df702c8f2477d313227"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a22c02863439993095acd0c3db97fa53cd515f4f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b735ad1a9aca6080192c1316cf2706e5e1318762"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/d45bf731ec7085d2cc2c5d179d3b3b6c743d4fb1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/eee2efd82867b623982ac51925b5a1812a74c50d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: wifi: mac80211: unlist vifs when their netdev is unregistered", "id": "2546512", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2546512"}, "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-617", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nwifi: mac80211: unlist vifs when their netdev is unregistered\nmac80211 only removes vifs from the local->interfaces list when\nan interface is removed via ieee80211_if_remove(), before it\nunregisters the netdev. However, it's possible for a netdev to\nbe unregistered without going through that: When the netns that\nholds the wiphy is destroyed, the wiphy is supposed to move to\nthe init_ns, but that can run into allocation failures.\nThen, mac80211 has an interface listed that doesn't exist, and\nwill eventually hit\nBUG: failure at net/wireless/core.h:141/wiphy_to_rdev()!\n...\n_cfg80211_unregister_wdev+0x24/0x36a [cfg80211]\ncfg80211_unregister_wdev+0x15/0x1d [cfg80211]\nieee80211_remove_interfaces+0x1ff/0x257 [mac80211]\nieee80211_unregister_hw+0x73/0x1d1 [mac80211]\nmac80211_hwsim_del_radio+0x114/0x166 [mac80211_hwsim]\nRemove the interface from the list in ->ndo_uninit if it's still\naround to avoid this.", "A flaw was found in the Linux kernel's mac80211 wireless networking subsystem. When a network namespace hosting a wireless device is destroyed, memory allocation failures during device migration can leave unregistered network interfaces in internal tracking lists. A local user can exploit this issue to trigger a kernel crash, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-98331", "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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "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"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Affected", "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-2026-98331\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98331\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98331.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[463d018323851a608eef52a9427b0585005c647f,a22c02863439993095acd0c3db97fa53cd515f4f)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[463d018323851a608eef52a9427b0585005c647f,20a56e96a6f7b4dfbd13f8732fd2673409fc7ba0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[463d018323851a608eef52a9427b0585005c647f,b735ad1a9aca6080192c1316cf2706e5e1318762)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[463d018323851a608eef52a9427b0585005c647f,d45bf731ec7085d2cc2c5d179d3b3b6c743d4fb1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[463d018323851a608eef52a9427b0585005c647f,821bab0456dfca12acef6df702c8f2477d313227)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[463d018323851a608eef52a9427b0585005c647f,eee2efd82867b623982ac51925b5a1812a74c50d)"}}], "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": "semver", "value": "2.6.32"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,2.6.32)"}}, {"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": "semver", "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": "2026-10-06T13:00:15.828792+00:00", "updated": "2026-10-11T05:15:17.409240+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}