# CVE-2022-50167: bpf: fix potential 32-bit overflow when accessing ARRAY map element

CVE-2022-50167 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-50167, released June 18, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-50167
- Priority: Routine
- CVSS: 5.5 (Moderate)
- EPSS: 0.0027
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 18, 2025
- Weakness: Integer Overflow or Wraparound
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/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.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.19.6-1 | [DEBIAN-CVE-2022-50167](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50167.md) | Jun 18, 2025 |
| Linux | linux Debian 13.5 (trixie) | 5.19.6-1 | [DEBIAN-CVE-2022-50167](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50167.md) | Jun 18, 2025 |
| Linux | linux Debian 14 | 5.19.6-1 | [DEBIAN-CVE-2022-50167](https://patchblox.com/security/data/fix/linux/debian-cve-2022-50167.md) | Jun 18, 2025 |

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