CVE-2022-50167

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: fix potential 32-bit overflow when accessing ARRAY map element If BPF array map is bigger than 4GB, element pointer calculation can overflow because both index and elem_size are u32. Fix this everywhere by forcing 64-bit multiplication. Extract this formula into separate small helper and use it consistently in various places. Speculative-preventing formula utilizing index_mask trick is left as is, but explicit u64 casts are added in both places.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

References

• https://git.kernel.org/stable/c/063e092534d4c6785228e5b1eb6e9329f66ccbe4 ↗
• https://git.kernel.org/stable/c/3c7256b880b3a5aa1895fd169a34aa4224a11862 ↗
• https://git.kernel.org/stable/c/87ac0d600943994444e24382a87aa19acc4cd3d4 ↗