{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-53012", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-06-09T07:44:35.378Z", "datePublished": "2026-06-24T16:29:22.973Z", "dateUpdated": "2026-06-24T16:29:22.973Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-06-24T16:29:22.973Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnexthop: fix IPv6 route referencing IPv4 nexthop\n\nsyzbot reported a panic [1] [2].\n\nWhen an IPv6 nexthop is replaced with an IPv4 nexthop, the has_v4 flag\nof all groups containing this nexthop is not updated. This is because\nnh_group_v4_update is only called when replacing AF_INET to AF_INET6,\nbut the reverse direction (AF_INET6 to AF_INET) is missed.\n\nThis allows a stale has_v4=false to bypass fib6_check_nexthop, causing\nIPv6 routes to be attached to groups that effectively contain only AF_INET\nmembers. Subsequent route lookups then call nexthop_fib6_nh() which\nreturns NULL for the AF_INET member, leading to a NULL pointer\ndereference.\n\nFix by calling nh_group_v4_update whenever the family changes, not just\nAF_INET to AF_INET6.\n\nReproducer:\n\t# AF_INET6 blackhole\n\tip -6 nexthop add id 1 blackhole\n\t# group with has_v4=false\n\tip nexthop add id 100 group 1\n\t# replace with AF_INET (no -6), has_v4 stays false\n\tip nexthop replace id 1 blackhole\n\t# pass stale has_v4 check\n\tip -6 route add 2001:db8::/64 nhid 100\n\t# panic\n\tping -6 2001:db8::1\n\n[1] https://syzkaller.appspot.com/bug?id=e17283eb2f8dcf3dd9b47fe6f67a95f71faadad0\n[2] https://syzkaller.appspot.com/bug?id=8699b6ae54c9f35837d925686208402949e12ef3"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/ipv4/nexthop.c"], "versions": [{"version": "7bf4796dd09984ad1612877a82d0d139c70ae27f", "lessThan": "ceffe81a0be92afc0cd1340bc8ca46559cce9bb4", "status": "affected", "versionType": "git"}, {"version": "7bf4796dd09984ad1612877a82d0d139c70ae27f", "lessThan": "9c2d6770a5f4545a307eb66979bef7656a34d621", "status": "affected", "versionType": "git"}, {"version": "7bf4796dd09984ad1612877a82d0d139c70ae27f", "lessThan": "6275796f22bb382f3e9aa58ed0b4ef7bdad78cb8", "status": "affected", "versionType": "git"}, {"version": "7bf4796dd09984ad1612877a82d0d139c70ae27f", "lessThan": "aaac3bed034239e1d75732211d9b05f30b0b4f35", "status": "affected", "versionType": "git"}, {"version": "7bf4796dd09984ad1612877a82d0d139c70ae27f", "lessThan": "ad85961004fd4bd2f31209ac4b07612c6cefb9e7", "status": "affected", "versionType": "git"}, {"version": "7bf4796dd09984ad1612877a82d0d139c70ae27f", "lessThan": "613c8f4a501421dd258b07ea614205d4e16ec845", "status": "affected", "versionType": "git"}, {"version": "7bf4796dd09984ad1612877a82d0d139c70ae27f", "lessThan": "b3b7e850e1541f0520c4a12ec884255c30427ff6", "status": "affected", "versionType": "git"}, {"version": "7bf4796dd09984ad1612877a82d0d139c70ae27f", "lessThan": "29c95185ba32b621fbc3800fb86e7dc3edf5c2be", "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/ipv4/nexthop.c"], "versions": [{"version": "5.3", "status": "affected"}, {"version": "0", "lessThan": "5.3", "status": "unaffected", "versionType": "semver"}, {"version": "5.10.258", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "5.15.209", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.175", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.141", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.91", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.33", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0.10", "lessThanOrEqual": "7.0.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.1", "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": "5.3", "versionEndExcluding": "5.10.258"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "5.15.209"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.1.175"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.6.141"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.12.91"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "6.18.33"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "7.0.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.3", "versionEndExcluding": "7.1"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/ceffe81a0be92afc0cd1340bc8ca46559cce9bb4"}, {"url": "https://git.kernel.org/stable/c/9c2d6770a5f4545a307eb66979bef7656a34d621"}, {"url": "https://git.kernel.org/stable/c/6275796f22bb382f3e9aa58ed0b4ef7bdad78cb8"}, {"url": "https://git.kernel.org/stable/c/aaac3bed034239e1d75732211d9b05f30b0b4f35"}, {"url": "https://git.kernel.org/stable/c/ad85961004fd4bd2f31209ac4b07612c6cefb9e7"}, {"url": "https://git.kernel.org/stable/c/613c8f4a501421dd258b07ea614205d4e16ec845"}, {"url": "https://git.kernel.org/stable/c/b3b7e850e1541f0520c4a12ec884255c30427ff6"}, {"url": "https://git.kernel.org/stable/c/29c95185ba32b621fbc3800fb86e7dc3edf5c2be"}], "title": "nexthop: fix IPv6 route referencing IPv4 nexthop", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{}

{"bugzilla": {"description": "kernel: nexthop: fix IPv6 route referencing IPv4 nexthop", "id": "2492327", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2492327"}, "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-476", "details": ["A flaw was found in the Linux kernel's networking subsystem. When an IPv6 nexthop is replaced with an IPv4 nexthop, a flag indicating the presence of IPv4 members in nexthop groups is not correctly updated. This can lead to IPv6 routes referencing groups that only contain IPv4 members. A local attacker could exploit this issue by crafting specific nexthop configurations, causing a NULL pointer dereference and ultimately leading to a system panic, resulting in a Denial of Service (DoS)."], "name": "CVE-2026-53012", "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": "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": "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"}], "public_date": "2026-06-24T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-53012\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-53012\nhttps://lore.kernel.org/linux-cve-announce/2026062450-CVE-2026-53012-8705@gregkh/T"], "threat_severity": "Moderate"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7bf4796dd09984ad1612877a82d0d139c70ae27f,ceffe81a0be92afc0cd1340bc8ca46559cce9bb4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7bf4796dd09984ad1612877a82d0d139c70ae27f,9c2d6770a5f4545a307eb66979bef7656a34d621)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7bf4796dd09984ad1612877a82d0d139c70ae27f,6275796f22bb382f3e9aa58ed0b4ef7bdad78cb8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7bf4796dd09984ad1612877a82d0d139c70ae27f,aaac3bed034239e1d75732211d9b05f30b0b4f35)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7bf4796dd09984ad1612877a82d0d139c70ae27f,ad85961004fd4bd2f31209ac4b07612c6cefb9e7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7bf4796dd09984ad1612877a82d0d139c70ae27f,613c8f4a501421dd258b07ea614205d4e16ec845)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7bf4796dd09984ad1612877a82d0d139c70ae27f,b3b7e850e1541f0520c4a12ec884255c30427ff6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[7bf4796dd09984ad1612877a82d0d139c70ae27f,29c95185ba32b621fbc3800fb86e7dc3edf5c2be)"}}], "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": "5.3"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[0,5.3)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.10.258,5.11.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.209,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.175,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.141,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.91,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.33,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.0.10,7.1.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1,*]"}}], "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": "2026-06-24T20:15:07.670288+00:00", "updated": "2026-06-26T03:30:07.175929+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}