UNKNOWN NVD
CVE-2026-98631
In the Linux kernel, the following vulnerability has been resolved: xsk: Use a 32-bit compare in xsk_map_gen_lookup xsk_map_gen_lookup() loads a u32 key and c
In the Linux kernel, the following vulnerability has been resolved:
xsk: Use a 32-bit compare in xsk_map_gen_lookup
xsk_map_gen_lookup() loads a u32 key and compares it with max_entries
using BPF_JMP_IMM. BPF immediates are sign-extended to 64 bits, so a
max_entries value of 0x80000000 or higher becomes a threshold larger
than every zero-extended 32-bit key. An out-of-range index then skips
the bounds check and the generated lookup reads past xsk_map[].
Compare with BPF_JMP32_IMM so the check stays in 32-bit unsigned range.
References
- https://git.kernel.org/stable/c/11d9be35c1f4233798e99be98bc474f83a254c6c
- https://git.kernel.org/stable/c/123f90f394ca404ab8796a7c8072ff7fa5b65a9c
- https://git.kernel.org/stable/c/227ec890559e922e235eb543646e3bf0bd8269b0
- https://git.kernel.org/stable/c/36461e58f88a1b723f86693f437ac12e60ff4363
- https://git.kernel.org/stable/c/3c1e0a4bc156b8d5c5772dbc76b9ea74dce5ca24
This unknown severity vulnerability was published on 2026-10-18 via NVD.
vulnfeed aggregates 17229 vulnerabilities from NVD, CISA KEV,
Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.