CVE-2026-45859

{"id": "CVE-2026-45859", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "NONE"}, "impactScore": 3.6, "exploitabilityScore": 3.9}]}, "affected": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "affectedData": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "7d8dc1c7be8d3509e8f5164dd5df64c8e34d7eeb", "lessThan": "79b713ef4261a8ead96af4703f89d0b5f25532e2", "versionType": "git"}, {"status": "affected", "version": "7d8dc1c7be8d3509e8f5164dd5df64c8e34d7eeb", "lessThan": "23901aa6b8a2f294c4b774436b4691f3ff863a8f", "versionType": "git"}, {"status": "affected", "version": "7d8dc1c7be8d3509e8f5164dd5df64c8e34d7eeb", "lessThan": "b740e7ddd7ca0dbfeafca3f5e52717206cf28524", "versionType": "git"}, {"status": "affected", "version": "7d8dc1c7be8d3509e8f5164dd5df64c8e34d7eeb", "lessThan": "207b3ebacb6113acaaec0d171d5307032c690004", "versionType": "git"}, {"status": "affected", "version": "6c4a0ba674f410ab99a30a16f32dac0ebfed5cd3", "versionType": "git"}, {"status": "affected", "version": "6dcc8ba8a6074bb79040f502dc66ad23a58a1c86", "versionType": "git"}, {"status": "affected", "version": "74e6eb7fd27ef1ccc68041dbc66e6d80d2e4a1a0", "versionType": "git"}, {"status": "affected", "version": "025b3326c5c409b372d0103ad30f174e55adbd1b", "versionType": "git"}, {"status": "affected", "version": "5.15.166", "lessThan": "5.16", "versionType": "semver"}, {"status": "affected", "version": "6.1.107", "lessThan": "6.2", "versionType": "semver"}, {"status": "affected", "version": "6.6.48", "lessThan": "6.7", "versionType": "semver"}, {"status": "affected", "version": "6.10.7", "lessThan": "6.11", "versionType": "semver"}], "programFiles": ["include/net/netfilter/nf_queue.h", "net/netfilter/nfnetlink_queue.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "6.11"}, {"status": "unaffected", "version": "0", "lessThan": "6.11", "versionType": "semver"}, {"status": "unaffected", "version": "6.12.75", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.14", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.4", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["include/net/netfilter/nf_queue.h", "net/netfilter/nfnetlink_queue.c"], "defaultStatus": "affected"}]}], "published": "2026-05-27T14:16:58.060", "references": [{"url": "https://git.kernel.org/stable/c/207b3ebacb6113acaaec0d171d5307032c690004", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/23901aa6b8a2f294c4b774436b4691f3ff863a8f", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/79b713ef4261a8ead96af4703f89d0b5f25532e2", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}, {"url": "https://git.kernel.org/stable/c/b740e7ddd7ca0dbfeafca3f5e52717206cf28524", "tags": ["Patch"], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "nvd@nist.gov", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nfnetlink_queue: do shared-unconfirmed check before segmentation\n\nUlrich reports a regression with nfqueue:\n\nIf an application did not set the 'F_GSO' capability flag and a gso\npacket with an unconfirmed nf_conn entry is received all packets are\nnow dropped instead of queued, because the check happens after\nskb_gso_segment(). In that case, we did have exclusive ownership\nof the skb and its associated conntrack entry. The elevated use\ncount is due to skb_clone happening via skb_gso_segment().\n\nMove the check so that its peformed vs. the aggregated packet.\n\nThen, annotate the individual segments except the first one so we\ncan do a 2nd check at reinject time.\n\nFor the normal case, where userspace does in-order reinjects, this avoids\npacket drops: first reinjected segment continues traversal and confirms\nentry, remaining segments observe the confirmed entry.\n\nWhile at it, simplify nf_ct_drop_unconfirmed(): We only care about\nunconfirmed entries with a refcnt > 1, there is no need to special-case\ndying entries.\n\nThis only happens with UDP. With TCP, the only unconfirmed packet will\nbe the TCP SYN, those aren't aggregated by GRO.\n\nNext patch adds a udpgro test case to cover this scenario."}], "lastModified": "2026-06-25T21:07:39.220", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1A731D98-0099-445F-8630-635D92F0D901", "versionEndExcluding": "5.16", "versionStartIncluding": "5.15.166"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8A1E4A4D-E736-4034-B734-953CD5D22F1D", "versionEndExcluding": "6.2", "versionStartIncluding": "6.1.107"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "72C40D03-D807-412F-8A03-2556A2D70DC5", "versionEndExcluding": "6.7", "versionStartIncluding": "6.6.48"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "48B1FCEA-70A6-45BD-A39B-9184638703FB", "versionEndExcluding": "6.11", "versionStartIncluding": "6.10.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "1C462C6C-BC40-4018-A8C4-C32BDE9791C9", "versionEndExcluding": "6.12.75", "versionStartIncluding": "6.11.1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BF463CB7-1F58-4607-B847-77ED23E4B9B7", "versionEndExcluding": "6.18.14", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "672A3E79-EC03-479D-8503-361DFBDC8092", "versionEndExcluding": "6.19.4", "versionStartIncluding": "6.19"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.11:-:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4770BA57-3F3F-493B-8608-EC3B25254949"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "39889A68-6D34-47A6-82FC-CD0BF23D6754"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B8383ABF-1457-401F-9B61-EE50F4C61F4F"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "B77A9280-37E6-49AD-B559-5B23A3B1DC3D"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.11:rc7:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "DE5298B3-04B4-4F3E-B186-01A58B5C75A6"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}