GHSA-mrhw-xcq4-7jw7MediumCVSS 5.5
In the Linux kernel, the following vulnerability has been resolved: bpf: fix potential 32-bit...
🔗 CVE IDs covered (1)
📋 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.
🔗 References (7)
- https://nvd.nist.gov/vuln/detail/CVE-2022-50167
- https://git.kernel.org/stable/c/063e092534d4c6785228e5b1eb6e9329f66ccbe4
- https://git.kernel.org/stable/c/3c7256b880b3a5aa1895fd169a34aa4224a11862
- https://git.kernel.org/stable/c/87ac0d600943994444e24382a87aa19acc4cd3d4
- https://git.kernel.org/stable/c/2157ac13db8d5763835f1663bdabda6de744cba8
- https://git.kernel.org/stable/c/f665c56e6836933335e5a4513fc9b0bf47cdf81f
- https://github.com/advisories/GHSA-mrhw-xcq4-7jw7