{"id":"CVE-2026-74669","summary":"ipvs: clear IPv4 options after rebasing tunnel ICMP errors","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nipvs: clear IPv4 options after rebasing tunnel ICMP errors\n\nip_vs_in_icmp() rebases an skb from the outer ICMP packet to the\nquoted original request before passing it to icmp_send(). However,\nIPCB(skb)-\u003eopt still describes the outer IPv4 header.\n\nA timestamp option in the outer header can therefore leave an offset\nthat points into the quoted transport header after the rebase.\n__ip_options_echo() treats a byte at that stale location as the option\nlength and copies it into the fixed-size option storage on the\n__icmp_send() stack, causing a stack out-of-bounds write.\n\nClear the stale option metadata after resetting the network header.\nKeep the remaining control block fields, including the ingress\ninterface used by the ICMP response path.","modified":"2026-08-27T11:31:13.724764456Z","published":"2026-08-22T15:32:40.221Z","database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74669.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/37c61b3745129cbd682c557b51345828120972e5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/384b4dae14277d369221d187e9b3af56c79d2e50"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6f46fc460e9316062bdcdf89199eb5d7a33da33b"},{"type":"WEB","url":"https://git.kernel.org/stable/c/75eec935444db4af2123e0491936f6e273d7ea00"},{"type":"WEB","url":"https://git.kernel.org/stable/c/79ffa99202c944467e28b13b513bf2998732edff"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c9413b50204738fbc429bb86bf01353c393a6c28"},{"type":"WEB","url":"https://git.kernel.org/stable/c/e0ba936287dfe9783426aac27e5fd76fe35b38c9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ed246dd85ebf27c1f6b7897834d40786c0ca3006"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74669.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74669"},{"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":"f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e"},{"fixed":"79ffa99202c944467e28b13b513bf2998732edff"},{"fixed":"c9413b50204738fbc429bb86bf01353c393a6c28"},{"fixed":"37c61b3745129cbd682c557b51345828120972e5"},{"fixed":"ed246dd85ebf27c1f6b7897834d40786c0ca3006"},{"fixed":"6f46fc460e9316062bdcdf89199eb5d7a33da33b"},{"fixed":"75eec935444db4af2123e0491936f6e273d7ea00"},{"fixed":"384b4dae14277d369221d187e9b3af56c79d2e50"},{"fixed":"e0ba936287dfe9783426aac27e5fd76fe35b38c9"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74669.json"}},{"package":{"name":"Kernel","ecosystem":"Linux"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"3.7.0"},{"fixed":"5.10.265"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.11.0"},{"fixed":"5.15.216"}]},{"type":"ECOSYSTEM","events":[{"introduced":"5.16.0"},{"fixed":"6.1.183"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.2.0"},{"fixed":"6.6.152"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.7.0"},{"fixed":"6.12.104"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.13.0"},{"fixed":"6.18.45"}]},{"type":"ECOSYSTEM","events":[{"introduced":"6.19.0"},{"fixed":"7.1.9"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74669.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:H/I:H/A:H"}]}