{"id":"CVE-2026-74724","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-74724","summary":"ipvs: avoid out-of-bounds write in ip_vs_nat_icmp","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nipvs: avoid out-of-bounds write in ip_vs_nat_icmp\n\nSashiko warns that local attacker can modify the packet\nwhile it is processed by IPVS. Some places read the\nIP ihl field multiple times which can cause out-of-bounds\naccess. One such place is ip_vs_nat_icmp where we\ncan write after the validated area.\n\nFix it by providing ciph argument just like it is done for\nIPv6 and use ciph->len as offset to the embedded transport\nheader.\n\nModify some IPv4 header checks by reading the ihl field\nonly once.","published":"2026-08-22T15:33:15.832Z","modified":"2026-08-27T03:57:17.908173980Z","cvss":{"score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"6.1.183"}],"fix":null,"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/243d0187ec4c3837b9b0004f18d1068e46115760"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3b8f79af0e98f27b932b0b416e9c52b692d31ff9"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3c779b258c9c3c3567af68d4f45c2f751f35bd0e"},{"type":"WEB","url":"https://git.kernel.org/stable/c/646922a0379496154e8c8faca4f8e2fd9100cacc"},{"type":"WEB","url":"https://git.kernel.org/stable/c/a69a4b3fff5814d079beff9a1e9d369994b2ed47"},{"type":"WEB","url":"https://git.kernel.org/stable/c/be65fa324640c7a95e30b146159a2be5cc73f22e"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74724.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74724"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-27T03:57:17.908173980Z"}}