{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-23304", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:45.993Z", "datePublished": "2026-03-25T10:26:59.015Z", "dateUpdated": "2026-07-14T12:46:31.831Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T22:04:17.686Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nipv6: fix NULL pointer deref in ip6_rt_get_dev_rcu()\n\nl3mdev_master_dev_rcu() can return NULL when the slave device is being\nun-slaved from a VRF. All other callers deal with this, but we lost\nthe fallback to loopback in ip6_rt_pcpu_alloc() -> ip6_rt_get_dev_rcu()\nwith commit 4832c30d5458 (\"net: ipv6: put host and anycast routes on\ndevice with address\").\n\n KASAN: null-ptr-deref in range [0x0000000000000108-0x000000000000010f]\n RIP: 0010:ip6_rt_pcpu_alloc (net/ipv6/route.c:1418)\n Call Trace:\n ip6_pol_route (net/ipv6/route.c:2318)\n fib6_rule_lookup (net/ipv6/fib6_rules.c:115)\n ip6_route_output_flags (net/ipv6/route.c:2607)\n vrf_process_v6_outbound (drivers/net/vrf.c:437)\n\nI was tempted to rework the un-slaving code to clear the flag first\nand insert synchronize_rcu() before we remove the upper. But looks like\nthe explicit fallback to loopback_dev is an established pattern.\nAnd I guess avoiding the synchronize_rcu() is nice, too." } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/ipv6/route.c" ], "versions": [ { "version": "4832c30d5458387ff2533ff66fbde26ad8bb5a2d", "lessThan": "d542e2ac7f9e288d49735be0775611547ca4e0ee", "status": "affected", "versionType": "git" }, { "version": "4832c30d5458387ff2533ff66fbde26ad8bb5a2d", "lessThan": "a73fe9f4ae84a239d5b2686f47a58c158aee2eb4", "status": "affected", "versionType": "git" }, { "version": "4832c30d5458387ff2533ff66fbde26ad8bb5a2d", "lessThan": "4a48fe59f29f673a3d042d679f26629a9c3e29d4", "status": "affected", "versionType": "git" }, { "version": "4832c30d5458387ff2533ff66fbde26ad8bb5a2d", "lessThan": "581800298313c9fd75e94985e6d37d21b7e35d34", "status": "affected", "versionType": "git" }, { "version": "4832c30d5458387ff2533ff66fbde26ad8bb5a2d", "lessThan": "3310fc11fc47387d1dd4759b0bc961643ea11c7f", "status": "affected", "versionType": "git" }, { "version": "4832c30d5458387ff2533ff66fbde26ad8bb5a2d", "lessThan": "0b5a7826020706057cc5a9d9009e667027f221ee", "status": "affected", "versionType": "git" }, { "version": "4832c30d5458387ff2533ff66fbde26ad8bb5a2d", "lessThan": "ae88c8256547b63980770a9ea7be73a15900d27e", "status": "affected", "versionType": "git" }, { "version": "4832c30d5458387ff2533ff66fbde26ad8bb5a2d", "lessThan": "2ffb4f5c2ccb2fa1c049dd11899aee7967deef5a", "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/ipv6/route.c" ], "versions": [ { "version": "4.14", "status": "affected" }, { "version": "0", "lessThan": "4.14", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.253", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.203", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.167", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.130", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.77", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.17", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.19.7", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.0", "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": "4.14", "versionEndExcluding": "5.10.253" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "5.15.203" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.1.167" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.6.130" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.12.77" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.18.17" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "6.19.7" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14", "versionEndExcluding": "7.0" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/d542e2ac7f9e288d49735be0775611547ca4e0ee" }, { "url": "https://git.kernel.org/stable/c/a73fe9f4ae84a239d5b2686f47a58c158aee2eb4" }, { "url": "https://git.kernel.org/stable/c/4a48fe59f29f673a3d042d679f26629a9c3e29d4" }, { "url": "https://git.kernel.org/stable/c/581800298313c9fd75e94985e6d37d21b7e35d34" }, { "url": "https://git.kernel.org/stable/c/3310fc11fc47387d1dd4759b0bc961643ea11c7f" }, { "url": "https://git.kernel.org/stable/c/0b5a7826020706057cc5a9d9009e667027f221ee" }, { "url": "https://git.kernel.org/stable/c/ae88c8256547b63980770a9ea7be73a15900d27e" }, { "url": "https://git.kernel.org/stable/c/2ffb4f5c2ccb2fa1c049dd11899aee7967deef5a" } ], "title": "ipv6: fix NULL pointer deref in ip6_rt_get_dev_rcu()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "x_adpType": "supplier", 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