CVE-2026-98311

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-98311", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-25T10:25:14.339Z", "datePublished": "2026-10-06T08:46:07.562Z", "dateUpdated": "2026-10-19T09:17:21.813Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T09:17:21.813Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: virt_wifi: don't transfer operstate before register\n\nvirt_wifi_newlink() calls netif_stacked_transfer_operstate() before\nregister_netdevice(). If the lower device is dormant, that queues the\nnew netdev on lweventlist while it is still uninitialized. If\nregistration fails after that, for example because of an invalid name\nsuch as \"bad/name\", free_netdev() immediately frees the object. A\nlater linkwatch_fire_event() then use-after-frees the list entry.\n\nMove the transfer to after netdev_upper_dev_link(), as macvlan and\nipvlan already do."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The trigger is a local RTM_NEWLINK netlink request of kind \"virt_wifi\" handled by virt_wifi_newlink(). No remote peer or WiFi frame supplies any input. The bug is a fault in the order of steps when creating the device.\nAC:L - The attacker sets up the state and triggers it alone. They bring the lower device (e.g. lo) up and set it dormant via IFLA_OPERSTATE, then send RTM_NEWLINK with an invalid name like \"bad/name\". netif_dormant_on() queues the device on lweventlist, register_netdevice() fails and free_netdev() frees the device while it is still queued. No race is involved.\nPR:L - rtnetlink_rcv_msg() and __rtnl_newlink() check CAP_NET_ADMIN only against the user namespace that owns the netns, so an unprivileged user can get it with unshare -Urn. __rtnl_newlink() also auto-loads rtnl-link-virt_wifi through request_module().\nUI:N - No victim action is needed; the attacker's own netlink messages create the dormant lower device, the failing virt_wifi link and the queued linkwatch event.\nS:U - Memory in the same kernel is corrupted and stays within the kernel's own security authority. No VM, IOMMU or sandbox boundary is crossed.\nC:H - The freed net_device is still linked into the global lweventlist. linkwatch_do_dev() later reads it (flags, state, qdisc pointers), so the attacker can reclaim the freed object with controlled data and use the resulting reads to leak memory.\nI:H - A list_add or list_del on lweventlist writes through link_watch_list into freed memory. With a reclaimed object, linkwatch_do_dev() calls dev_activate() or dev_deactivate() on qdisc pointers the attacker controls, which allows corrupting memory and hijacking control flow.\nA:H - Even without careful exploitation, the queued linkwatch_event work or any later linkwatch_fire_event() corrupts list memory or touches freed memory. That causes a kernel oops or panic, and the attacker can repeat it."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/virtual/virt_wifi.c"], "versions": [{"version": "c7cdba31ed8b87526db978976392802d3f93110c", "lessThan": "ee9ea1afd6990def51d52b3a0aecd5cfcc951da0", "status": "affected", "versionType": "git"}, {"version": "c7cdba31ed8b87526db978976392802d3f93110c", "lessThan": "9ce26201f6dedf3fa02b97da8c67ee6f6c5f7225", "status": "affected", "versionType": "git"}, {"version": "c7cdba31ed8b87526db978976392802d3f93110c", "lessThan": "f9526054c2b2cace5916b7225603d008834ec011", "status": "affected", "versionType": "git"}, {"version": "c7cdba31ed8b87526db978976392802d3f93110c", "lessThan": "e8304e25c6dabb8accf38b807969438d0ce84fd7", "status": "affected", "versionType": "git"}, {"version": "c7cdba31ed8b87526db978976392802d3f93110c", "lessThan": "ca49763c42c1089d654bf11b037980a9ede3772c", "status": "affected", "versionType": "git"}, {"version": "c7cdba31ed8b87526db978976392802d3f93110c", "lessThan": "293c56a66510bb7de073a1aba388e38abddff1fb", "status": "affected", "versionType": "git"}, {"version": "c7cdba31ed8b87526db978976392802d3f93110c", "lessThan": "b808a9af5fd21f9c68b0d024eda7535b5dce6a4e", "status": "affected", "versionType": "git"}, {"version": "c7cdba31ed8b87526db978976392802d3f93110c", "lessThan": "e5c8d7acd31b27057ea42cd405d0b3ece097bc89", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/net/wireless/virtual/virt_wifi.c"], "versions": [{"version": "5.0", "status": "affected"}, {"version": "0", "lessThan": "5.0", "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": "5.0", "versionEndExcluding": "5.10.271"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "5.15.222"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.1.189"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.6.158"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.12.112"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "6.18.54"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "7.2.8"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.0", "versionEndExcluding": "7.3"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ee9ea1afd6990def51d52b3a0aecd5cfcc951da0"}, {"url": "https://git.kernel.org/stable/c/9ce26201f6dedf3fa02b97da8c67ee6f6c5f7225"}, {"url": "https://git.kernel.org/stable/c/f9526054c2b2cace5916b7225603d008834ec011"}, {"url": "https://git.kernel.org/stable/c/e8304e25c6dabb8accf38b807969438d0ce84fd7"}, {"url": "https://git.kernel.org/stable/c/ca49763c42c1089d654bf11b037980a9ede3772c"}, {"url": "https://git.kernel.org/stable/c/293c56a66510bb7de073a1aba388e38abddff1fb"}, {"url": "https://git.kernel.org/stable/c/b808a9af5fd21f9c68b0d024eda7535b5dce6a4e"}, {"url": "https://git.kernel.org/stable/c/e5c8d7acd31b27057ea42cd405d0b3ece097bc89"}], "title": "wifi: virt_wifi: don't transfer operstate before register", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["drivers/net/wireless/virtual/virt_wifi.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "ee9ea1afd6990def51d52b3a0aecd5cfcc951da0", "status": "affected", "version": "c7cdba31ed8b87526db978976392802d3f93110c", "versionType": "git"}, {"lessThan": "9ce26201f6dedf3fa02b97da8c67ee6f6c5f7225", "status": "affected", "version": "c7cdba31ed8b87526db978976392802d3f93110c", "versionType": "git"}, {"lessThan": "f9526054c2b2cace5916b7225603d008834ec011", "status": "affected", "version": "c7cdba31ed8b87526db978976392802d3f93110c", "versionType": "git"}, {"lessThan": "e8304e25c6dabb8accf38b807969438d0ce84fd7", "status": "affected", "version": "c7cdba31ed8b87526db978976392802d3f93110c", "versionType": "git"}, {"lessThan": "ca49763c42c1089d654bf11b037980a9ede3772c", "status": "affected", "version": "c7cdba31ed8b87526db978976392802d3f93110c", "versionType": "git"}, {"lessThan": "293c56a66510bb7de073a1aba388e38abddff1fb", "status": "affected", "version": "c7cdba31ed8b87526db978976392802d3f93110c", "versionType": "git"}, {"lessThan": "b808a9af5fd21f9c68b0d024eda7535b5dce6a4e", "status": "affected", "version": "c7cdba31ed8b87526db978976392802d3f93110c", "versionType": "git"}, {"lessThan": "e5c8d7acd31b27057ea42cd405d0b3ece097bc89", "status": "affected", "version": "c7cdba31ed8b87526db978976392802d3f93110c", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["drivers/net/wireless/virtual/virt_wifi.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "5.0"}, {"lessThan": "5.0", "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: virt_wifi: don't transfer operstate before register\n\nvirt_wifi_newlink() calls netif_stacked_transfer_operstate() before\nregister_netdevice(). If the lower device is dormant, that queues the\nnew netdev on lweventlist while it is still uninitialized. If\nregistration fails after that, for example because of an invalid name\nsuch as \"bad/name\", free_netdev() immediately frees the object. A\nlater linkwatch_fire_event() then use-after-frees the list entry.\n\nMove the transfer to after netdev_upper_dev_link(), as macvlan and\nipvlan already do."}], "id": "CVE-2026-98311", "lastModified": "2026-10-19T10:18:33.153", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}]}, "published": "2026-10-06T09:18:22.573", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/293c56a66510bb7de073a1aba388e38abddff1fb"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9ce26201f6dedf3fa02b97da8c67ee6f6c5f7225"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b808a9af5fd21f9c68b0d024eda7535b5dce6a4e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ca49763c42c1089d654bf11b037980a9ede3772c"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e5c8d7acd31b27057ea42cd405d0b3ece097bc89"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e8304e25c6dabb8accf38b807969438d0ce84fd7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ee9ea1afd6990def51d52b3a0aecd5cfcc951da0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f9526054c2b2cace5916b7225603d008834ec011"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{"bugzilla": {"description": "kernel: wifi: virt_wifi: don't transfer operstate before register", "id": "2546440", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2546440"}, "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-825", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nwifi: virt_wifi: don't transfer operstate before register\nvirt_wifi_newlink() calls netif_stacked_transfer_operstate() before\nregister_netdevice(). If the lower device is dormant, that queues the\nnew netdev on lweventlist while it is still uninitialized. If\nregistration fails after that, for example because of an invalid name\nsuch as \"bad/name\", free_netdev() immediately frees the object. A\nlater linkwatch_fire_event() then use-after-frees the list entry.\nMove the transfer to after netdev_upper_dev_link(), as macvlan and\nipvlan already do.", "A flaw was found in the Linux kernel's virt_wifi driver. A local user can exploit this vulnerability by attempting to create a virtual network interface with an invalid name while the underlying network device is dormant. Due to improper initialization handling, the system prematurely frees memory associated with the device while it remains queued for background events, resulting in a use-after-free condition. This issue can lead to a system crash, causing a denial of service (DoS), or potentially allow arbitrary code execution."], "name": "CVE-2026-98311", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "openshift/ose-rhel-coreos-8", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not 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-2026-98311\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-98311\nhttps://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-98311.mbox"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c7cdba31ed8b87526db978976392802d3f93110c,ee9ea1afd6990def51d52b3a0aecd5cfcc951da0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c7cdba31ed8b87526db978976392802d3f93110c,9ce26201f6dedf3fa02b97da8c67ee6f6c5f7225)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c7cdba31ed8b87526db978976392802d3f93110c,f9526054c2b2cace5916b7225603d008834ec011)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c7cdba31ed8b87526db978976392802d3f93110c,e8304e25c6dabb8accf38b807969438d0ce84fd7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c7cdba31ed8b87526db978976392802d3f93110c,ca49763c42c1089d654bf11b037980a9ede3772c)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c7cdba31ed8b87526db978976392802d3f93110c,293c56a66510bb7de073a1aba388e38abddff1fb)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c7cdba31ed8b87526db978976392802d3f93110c,b808a9af5fd21f9c68b0d024eda7535b5dce6a4e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[c7cdba31ed8b87526db978976392802d3f93110c,e5c8d7acd31b27057ea42cd405d0b3ece097bc89)"}}], "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": "5.0"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.0)"}}, {"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": "2026-10-06T14:00:20.949351+00:00", "updated": "2026-10-10T03:30:16.493762+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}