{"id":"CVE-2026-64355","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-64355","generatedAt":"2026-10-28T03:23:05.357Z","title":"In the Linux kernel, the following vulnerability has been resolved: bpf: Reject fragmented frames in devmap Devmap broadcast redirects clone the packet for all but the last destination.","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject fragmented frames in devmap\n\nDevmap broadcast redirects clone the packet for all but the last\ndestination.\n\nFor native XDP, that clone path copies only the linear xdp_frame data,\nwhile fragmented frames keep skb_shared_info in tailroom outside the\nlinear area. Cloning such a frame leaves XDP_FLAGS_HAS_FRAGS set but\nwithout valid frag metadata, and the later free path can interpret\nuninitialized tail data as skb_shared_info, leading to an out-of-bounds\naccess during frame return.\n\nReject fragmented native XDP frames in dev_map_enqueue_clone().\n\nAdd the same restriction to the generic XDP clone path in\ndev_map_redirect_clone(). Generic XDP represents fragmented packets as\nnonlinear skbs, and rejecting them here keeps clone-based broadcast\nsupport aligned between native and generic XDP.","published":"2026-07-25T10:17:18.000Z","lastModified":"2026-10-19T21:17:33.000Z","status":"Modified","sourceIdentifier":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","cvss":{"version":"3.1","score":9.8,"severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-125","CWE-787"],"affected":["linux/linux kernel"],"epss":{"score":0.00513,"percentile":0.43461,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.51%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://git.kernel.org/stable/c/07a4c11ee8ef4abcb39d922e9e410ae269671cdf","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/47baddc856ae7e93a565dd9deeb797999b179466","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/51d07c12ca411e692c424ecdabf077f1e61a61be","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/a9bb2d9c798cb62a4050a991c27b752770c33afe","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/aa496720618f1a6054f1c870bf10b4f6c99bf656","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/bccbab36ff228e0825eb85d9b0f9b8434cd0a399","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/c5b4f5efcb55c1af3fe44ff712d31b7fb098a831","tags":["Patch"],"source":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-64355","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}