{"id":"CVE-2026-80681","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-80681","summary":"vxlan: re-fetch eth header after route_shortcircuit()","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nvxlan: re-fetch eth header after route_shortcircuit()\n\nBefore route_shortcircuit(), the eth header pointer is cached from eth_hdr(skb).\n\nInside route_shortcircuit(), pskb_may_pull() can be called, which may\nreallocate skb->head.\n\nIn this case, returning to vxlan_xmit() leaves the cached eth pointer pointing to\nfreed memory, leading to a use-after-free when dereferencing eth->h_dest.\n\nFix this by updating eth = eth_hdr(skb) after calling route_shortcircuit().","published":"2026-08-28T06:52:48.896Z","modified":"2026-08-29T03:47:17.158132348Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[{"ecosystem":"Linux","name":"Kernel","fixedVersion":"5.10.265"}],"fix":null,"references":[{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1235e017aa11cf01e91b613c4c5ed6aa28934fff"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1395a676ec15a0a02a2a6d86602324f2d5fd41d5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1511631b7cfc4152b10a0a9d04c7a0bf2ddf4585"},{"type":"WEB","url":"https://git.kernel.org/stable/c/1b7f7b653e3557690047c62f03b80a24ea5a58a5"},{"type":"WEB","url":"https://git.kernel.org/stable/c/2355c8c26d2aa1b4385b369e67202e47d460d555"},{"type":"WEB","url":"https://git.kernel.org/stable/c/6375093eb45cd7d89f1945f939eeae3b29d79f56"},{"type":"WEB","url":"https://git.kernel.org/stable/c/bf045341dfb3e767f0ff94cf240ce3c371973bd4"},{"type":"WEB","url":"https://git.kernel.org/stable/c/c9dceac9e1c7c772c43c732fc0d325e72835801a"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/80xxx/CVE-2026-80681.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-80681"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-29T03:47:17.158132348Z"}}