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
linux: linux kernel
References5
- git.kernel.org/stable/c/063e092534d4c6785228e5b1eb6e9329f66ccbe4 Patch
- git.kernel.org/stable/c/3c7256b880b3a5aa1895fd169a34aa4224a11862 Patch
- git.kernel.org/stable/c/87ac0d600943994444e24382a87aa19acc4cd3d4 Patch
- git.kernel.org/stable/c/2157ac13db8d5763835f1663bdabda6de744cba8
- git.kernel.org/stable/c/f665c56e6836933335e5a4513fc9b0bf47cdf81f
Metrics
- CVSS 3.1
-
5.5
MEDIUM
Score source: NVD
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H - EPSS — exploit probability
- 0% percentile: 19 · as of 7 November 2026
- CWE
- CWE-190
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.