{"id":"CVE-2026-80637","title":"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 field…","summary":"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 field…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","published":"2026-08-28","updated":"2026-08-29","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-80637","references":[{"url":"https://git.kernel.org/stable/c/2b8e7aaa38002d8ee2f48d87b1f392eadd8e98c4","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/5c9c67cf7a3d16051dfb90e98836f530964dfb8e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/992c20bc8a4aba220c8b95b467d049289778dad6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/ea3d2caa5bfacf5db5c1cad521ca5d9144edd9a7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80637.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-80637"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2525460"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-80637"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80637"},{"url":"https://lore.kernel.org/linux-cve-announce/2026082840-CVE-2026-80637-4cf0@gregkh/T"},{"url":"https://git.kernel.org/stable/c/95cda0446f51077c343fdd8264be2737eb25a6c3"}],"tags":["nvd","cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.0063,"epssPercentile":0.49967,"ingestedAt":"2026-08-30T03:46:31.135Z","vendor":"Linux","product":"Linux","affected":["Linux >= 48b1de4c110a7afa4b85862f6c75af817db26fad < 2b8e7aaa38002d8ee2f48d87b1f392eadd8e98c4","Linux >= 48b1de4c110a7afa4b85862f6c75af817db26fad < 5c9c67cf7a3d16051dfb90e98836f530964dfb8e","Linux >= 48b1de4c110a7afa4b85862f6c75af817db26fad < ea3d2caa5bfacf5db5c1cad521ca5d9144edd9a7","Linux >= 48b1de4c110a7afa4b85862f6c75af817db26fad < 992c20bc8a4aba220c8b95b467d049289778dad6","Linux 3.12"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-16T19:19:14.142885Z"},"cwe":["CWE-468"],"scores":{"nvd":7.5,"vendor":5.5,"cna":7.5},"slug":"CVE-2026-80637","body":"## Overview\n\nIn 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().\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-80637.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}