{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-80646", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.779Z", "datePublished": "2026-08-28T06:48:56.277Z", "dateUpdated": "2026-10-16T19:26:31.747Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-29T06:21:41.550Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: guard against possible NULL deref in __in6_dev_stats_get()\n\ndev_get_by_index_rcu() could return NULL if the original physical\ndevice is unregistered.\n\nFound by Sashiko." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:N - Remote attackers reach ipv6_frag_rcv() through the standard IPv6 receive and local-delivery path (ipv6_rcv to ip6_protocol_deliver_rcu) by sending fragmented IPv6 packets to an Internet-facing host running IPv6 reassembly on a VRF/L3-master ingress path.\nAC:L - An attacker can repeatedly deliver IPv6 fragments and time them against concurrent netdev unregister (link teardown, container veth removal, or ip link del with CAP_NET_ADMIN in a user namespace), controlling both sides of the race rather than depending on uncontrollable layout.\nPR:N - Sending unauthenticated IPv6 fragments requires no kernel credentials; VRF/L3-master configuration is a deployment condition on routers and cloud hosts, not a privilege the attacker must hold to deliver the triggering traffic.\nUI:N - Exploitation needs only network delivery of fragmented IPv6 packets during interface teardown; no victim action such as opening files, clicking links, or mounting filesystems is required.\nS:U - The NULL dereference crashes the kernel on the receiving host but does not cross a VM, container, or IOMMU security boundary; impact stays within the same kernel security authority.\nC:N - The failure is a NULL pointer read in __in6_dev_get(NULL) after dev_get_by_index_rcu() returns NULL; there is no use-after-free, out-of-bounds read, or other information-disclosure primitive.\nI:N - The bug dereferences a NULL net_device pointer for statistics lookup only; it provides no memory write, corruption, or control-flow hijack primitive beyond crashing the kernel.\nA:H - The NULL dereference during IPv6 fragment receive/reassembly processing in softirq context causes a kernel OOPS or panic, fully denying availability on the affected system until reboot." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/net/addrconf.h" ], "versions": [ { "version": "e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f", "lessThan": "a23f2c68c6635e41404f189f8f7ae910738cebdb", "status": "affected", "versionType": "git" }, { "version": "e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f", "lessThan": "e14db43677946bf2095febd294bb3c13ab375ab7", "status": "affected", "versionType": "git" }, { "version": "e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f", "lessThan": "1a4adfbeb47a212a64539137411f1ca168474d33", "status": "affected", "versionType": "git" }, { "version": "e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f", "lessThan": "1e3db30a88815bae6e9d5db6f64ac735e615a07e", "status": "affected", "versionType": "git" }, { "version": "e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f", "lessThan": "952426a83ca75cea25c09d58944abafaa3ebd242", "status": "affected", "versionType": "git" }, { "version": "e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f", "lessThan": "0db1949084e85a72d174a7dea3259b94fe5a9305", "status": "affected", "versionType": "git" }, { "version": "e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f", "lessThan": "fc920c0659cdea5afd8721c1155a51564859e075", "status": "affected", "versionType": "git" }, { "version": "e1ae5c2ea4783b1fd87be250f9fcc9d9e1a6ba3f", "lessThan": "507541c2a8eeb76c02bd2511958f73a8cfa3e1bc", "status": "affected", "versionType": "git" }, { "version": "a24963500a4ec921ce9c2597e0a584e44513afae", "status": "affected", "versionType": "git" }, { "version": "4.19.291", "lessThan": "4.20", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "include/net/addrconf.h" ], "versions": [ { "version": "5.2", "status": "affected" }, { "version": "0", "lessThan": "5.2", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "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": "5.2", "versionEndExcluding": "5.10.261" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "5.15.212" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "6.1.178" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "6.6.145" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "6.12.97" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "6.18.40" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "7.1.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.2", "versionEndExcluding": "7.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.291" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/a23f2c68c6635e41404f189f8f7ae910738cebdb" }, { "url": "https://git.kernel.org/stable/c/e14db43677946bf2095febd294bb3c13ab375ab7" }, { "url": "https://git.kernel.org/stable/c/1a4adfbeb47a212a64539137411f1ca168474d33" }, { "url": "https://git.kernel.org/stable/c/1e3db30a88815bae6e9d5db6f64ac735e615a07e" }, { "url": "https://git.kernel.org/stable/c/952426a83ca75cea25c09d58944abafaa3ebd242" }, { "url": "https://git.kernel.org/stable/c/0db1949084e85a72d174a7dea3259b94fe5a9305" }, { "url": "https://git.kernel.org/stable/c/fc920c0659cdea5afd8721c1155a51564859e075" }, { "url": "https://git.kernel.org/stable/c/507541c2a8eeb76c02bd2511958f73a8cfa3e1bc" } ], "title": "ipv6: guard against possible NULL deref in __in6_dev_stats_get()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2026-80646", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "yes" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2026-10-16T19:19:19.200610Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T19:26:31.747Z" } } ] } }