{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-80637", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-26T14:34:25.777Z", "datePublished": "2026-08-28T06:48:50.836Z", "dateUpdated": "2026-08-28T06:48:50.836Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-28T06:48:50.836Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: synproxy: fix unaligned memory access in timestamp adjustment\n\nUse get_unaligned_be32() and put_unaligned_be32() to safely read and\nwrite the timestamp fields. This prevents performance degradation due to\nunaligned memory access or even a crash on strict alignment\narchitectures.\n\nThis follows the implementation of timestamp parsing in the networking\nstack at tcp_parse_options() and synproxy_parse_options()."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/netfilter/nf_synproxy_core.c"], "versions": [{"version": "48b1de4c110a7afa4b85862f6c75af817db26fad", "lessThan": "2b8e7aaa38002d8ee2f48d87b1f392eadd8e98c4", "status": "affected", "versionType": "git"}, {"version": "48b1de4c110a7afa4b85862f6c75af817db26fad", "lessThan": "5c9c67cf7a3d16051dfb90e98836f530964dfb8e", "status": "affected", "versionType": "git"}, {"version": "48b1de4c110a7afa4b85862f6c75af817db26fad", "lessThan": "ea3d2caa5bfacf5db5c1cad521ca5d9144edd9a7", "status": "affected", "versionType": "git"}, {"version": "48b1de4c110a7afa4b85862f6c75af817db26fad", "lessThan": "992c20bc8a4aba220c8b95b467d049289778dad6", "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/netfilter/nf_synproxy_core.c"], "versions": [{"version": "3.12", "status": "affected"}, {"version": "0", "lessThan": "3.12", "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": "3.12", "versionEndExcluding": "6.12.97"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "6.18.40"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "3.12", "versionEndExcluding": "7.2"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/2b8e7aaa38002d8ee2f48d87b1f392eadd8e98c4"}, {"url": "https://git.kernel.org/stable/c/5c9c67cf7a3d16051dfb90e98836f530964dfb8e"}, {"url": "https://git.kernel.org/stable/c/ea3d2caa5bfacf5db5c1cad521ca5d9144edd9a7"}, {"url": "https://git.kernel.org/stable/c/992c20bc8a4aba220c8b95b467d049289778dad6"}], "title": "netfilter: synproxy: fix unaligned memory access in timestamp adjustment", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["net/netfilter/nf_synproxy_core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "2b8e7aaa38002d8ee2f48d87b1f392eadd8e98c4", "status": "affected", "version": "48b1de4c110a7afa4b85862f6c75af817db26fad", "versionType": "git"}, {"lessThan": "5c9c67cf7a3d16051dfb90e98836f530964dfb8e", "status": "affected", "version": "48b1de4c110a7afa4b85862f6c75af817db26fad", "versionType": "git"}, {"lessThan": "ea3d2caa5bfacf5db5c1cad521ca5d9144edd9a7", "status": "affected", "version": "48b1de4c110a7afa4b85862f6c75af817db26fad", "versionType": "git"}, {"lessThan": "992c20bc8a4aba220c8b95b467d049289778dad6", "status": "affected", "version": "48b1de4c110a7afa4b85862f6c75af817db26fad", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["net/netfilter/nf_synproxy_core.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "3.12"}, {"lessThan": "3.12", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.12.*", "status": "unaffected", "version": "6.12.97", "versionType": "semver"}, {"lessThanOrEqual": "6.18.*", "status": "unaffected", "version": "6.18.40", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2", "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\nnetfilter: synproxy: fix unaligned memory access in timestamp adjustment\n\nUse get_unaligned_be32() and put_unaligned_be32() to safely read and\nwrite the timestamp fields. This prevents performance degradation due to\nunaligned memory access or even a crash on strict alignment\narchitectures.\n\nThis follows the implementation of timestamp parsing in the networking\nstack at tcp_parse_options() and synproxy_parse_options()."}], "id": "CVE-2026-80637", "lastModified": "2026-08-28T08:16:48.620", "metrics": {}, "published": "2026-08-28T08:16:48.620", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/2b8e7aaa38002d8ee2f48d87b1f392eadd8e98c4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/5c9c67cf7a3d16051dfb90e98836f530964dfb8e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/992c20bc8a4aba220c8b95b467d049289778dad6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/ea3d2caa5bfacf5db5c1cad521ca5d9144edd9a7"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[48b1de4c110a7afa4b85862f6c75af817db26fad,2b8e7aaa38002d8ee2f48d87b1f392eadd8e98c4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[48b1de4c110a7afa4b85862f6c75af817db26fad,5c9c67cf7a3d16051dfb90e98836f530964dfb8e)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[48b1de4c110a7afa4b85862f6c75af817db26fad,ea3d2caa5bfacf5db5c1cad521ca5d9144edd9a7)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[48b1de4c110a7afa4b85862f6c75af817db26fad,992c20bc8a4aba220c8b95b467d049289778dad6)"}}], "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": "generic", "value": "3.12"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,3.12)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.97,6.13.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.40,6.19.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[7.1.5,7.2.0]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2,*]"}}], "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": "2026-08-28T12:30:16.809121+00:00", "updated": "2026-08-28T12:30:16.809175+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}