{"id":"CVE-2026-98631","published":"2026-10-18T16:17:16.180","lastModified":"2026-10-19T10:19:27.347","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nxsk: Use a 32-bit compare in xsk_map_gen_lookup\n\nxsk_map_gen_lookup() loads a u32 key and compares it with max_entries\nusing BPF_JMP_IMM. BPF immediates are sign-extended to 64 bits, so a\nmax_entries value of 0x80000000 or higher becomes a threshold larger\nthan every zero-extended 32-bit key. An out-of-range index then skips\nthe bounds check and the generated lookup reads past xsk_map[].\n\nCompare with BPF_JMP32_IMM so the check stays in 32-bit unsigned range.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/11d9be35c1f4233798e99be98bc474f83a254c6c","tags":[]},{"url":"https://git.kernel.org/stable/c/123f90f394ca404ab8796a7c8072ff7fa5b65a9c","tags":[]},{"url":"https://git.kernel.org/stable/c/227ec890559e922e235eb543646e3bf0bd8269b0","tags":[]},{"url":"https://git.kernel.org/stable/c/36461e58f88a1b723f86693f437ac12e60ff4363","tags":[]},{"url":"https://git.kernel.org/stable/c/3c1e0a4bc156b8d5c5772dbc76b9ea74dce5ca24","tags":[]},{"url":"https://git.kernel.org/stable/c/70504de0bb627848667207bec7ccfd647deb8814","tags":[]},{"url":"https://git.kernel.org/stable/c/b5c0cff0c5331582ab01c4c423731453a8381acc","tags":[]},{"url":"https://git.kernel.org/stable/c/c6d5c582d55a8f229d75e98d62eaa065b0deb18d","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}