Description (CNA)
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.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected e65650f291ee72fc578d6346080fc4699204ef2c before c6d5c582d55a8f229d75e98d62eaa065b0deb18d; affected e65650f291ee72fc578d6346080fc4699204ef2c before 227ec890559e922e235eb543646e3bf0bd8269b0; affected e65650f291ee72fc578d6346080fc4699204ef2c before 11d9be35c1f4233798e99be98bc474f83a254c6c; affected e65650f291ee72fc578d6346080fc4699204ef2c before 123f90f394ca404ab8796a7c8072ff7fa5b65a9c; affected e65650f291ee72fc578d6346080fc4699204ef2c before 36461e58f88a1b723f86693f437ac12e60ff4363; affected e65650f291ee72fc578d6346080fc4699204ef2c before b5c0cff0c5331582ab01c4c423731453a8381acc; affected e65650f291ee72fc578d6346080fc4699204ef2c before 3c1e0a4bc156b8d5c5772dbc76b9ea74dce5ca24; affected e65650f291ee72fc578d6346080fc4699204ef2c before 70504de0bb627848667207bec7ccfd647deb8814 |
| Linux / Linux | affected 5.5; unaffected 0 before 5.5; unaffected 5.10.271 through 5.10.*; unaffected 5.15.222 through 5.15.*; unaffected 6.1.189 through 6.1.*; unaffected 6.6.158 through 6.6.*; unaffected 6.12.112 through 6.12.*; unaffected 6.18.55 through 6.18.*; unaffected 7.2.9 through 7.2.*; unaffected 7.3 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/c6d5c582d55a8f229d75e98d62eaa065b0deb18d
- https://git.kernel.org/stable/c/227ec890559e922e235eb543646e3bf0bd8269b0
- https://git.kernel.org/stable/c/11d9be35c1f4233798e99be98bc474f83a254c6c
- https://git.kernel.org/stable/c/123f90f394ca404ab8796a7c8072ff7fa5b65a9c
- https://git.kernel.org/stable/c/36461e58f88a1b723f86693f437ac12e60ff4363
- https://git.kernel.org/stable/c/b5c0cff0c5331582ab01c4c423731453a8381acc
- https://git.kernel.org/stable/c/3c1e0a4bc156b8d5c5772dbc76b9ea74dce5ca24
- https://git.kernel.org/stable/c/70504de0bb627848667207bec7ccfd647deb8814