{"id":"CVE-2026-80637","summary":"netfilter: synproxy: fix unaligned memory access in timestamp adjustment","details":"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().","modified":"2026-08-31T03:30:27.307116544Z","published":"2026-08-28T06:48:50.836Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80637.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/2b8e7aaa38002d8ee2f48d87b1f392eadd8e98c4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/5c9c67cf7a3d16051dfb90e98836f530964dfb8e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/992c20bc8a4aba220c8b95b467d049289778dad6"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ea3d2caa5bfacf5db5c1cad521ca5d9144edd9a7"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80637.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80637"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"48b1de4c110a7afa4b85862f6c75af817db26fad"},{"fixed":"2b8e7aaa38002d8ee2f48d87b1f392eadd8e98c4"},{"fixed":"5c9c67cf7a3d16051dfb90e98836f530964dfb8e"},{"fixed":"ea3d2caa5bfacf5db5c1cad521ca5d9144edd9a7"},{"fixed":"992c20bc8a4aba220c8b95b467d049289778dad6"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80637.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.12.0"},{"fixed":"6.12.97"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.40"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.5"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-80637.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"}]}