# CVE-2022-28805: liblua5.4-0: singlevar in lparser.c in Lua from (including) 5.4.0 up to (excluding) 5.4.4 lacks a certain luaK_exp2anyregup call,...

CVE-2022-28805 is fixed in 5 products on 1 platform, first by DEBIAN-CVE-2022-28805, released April 8, 2022. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2022-28805
- Priority: High
- CVSS: 9.1 (Medium)
- EPSS: 0.0298
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Apr 7, 2022

## Description

singlevar in lparser.c in Lua from (including) 5.4.0 up to (excluding) 5.4.4 lacks a certain luaK_exp2anyregup call, leading to a heap-based buffer over-read that might affect a system that compiles untrusted Lua code.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | liblua5.4-0 Ubuntu 22.04.1 LTS (jammy) | 5.4.4-1ubuntu0.1~esm1 | [liblua5.4-0 5.4.4-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-liblua5.4-0-5.4.4-1ubuntu0.1-esm1.md) | Jul 1, 2022 |
| Linux | lua RHEL 9 | 0:5.4.4-3.el9 | [RHSA-2023:2582](https://patchblox.com/security/data/fix/linux/rhsa-2023-2582.md) | May 9, 2023 |
| Linux | lua almalinux 9 | 5.4.4-3.el9 | [ALSA-2023:2582](https://patchblox.com/security/data/fix/linux/alsa-2023-2582.md) | May 9, 2023 |
| Linux | lua ol 9 | 0:5.4.4-3.el9 | [ELSA-2023-2582](https://patchblox.com/security/data/fix/linux/elsa-2023-2582.md) | May 15, 2023 |
| Linux | lua-devel RHEL 9 | 0:5.4.4-3.el9 | [RHSA-2023:2582](https://patchblox.com/security/data/fix/linux/rhsa-2023-2582.md) | May 9, 2023 |
| Linux | lua-devel almalinux 9 | 5.4.4-3.el9 | [ALSA-2023:2582](https://patchblox.com/security/data/fix/linux/alsa-2023-2582.md) | May 9, 2023 |
| Linux | lua-devel ol 9 | 0:5.4.4-3.el9 | [ELSA-2023-2582](https://patchblox.com/security/data/fix/linux/elsa-2023-2582.md) | May 15, 2023 |
| Linux | lua-libs RHEL 9 | 0:5.4.4-3.el9 | [RHSA-2023:2582](https://patchblox.com/security/data/fix/linux/rhsa-2023-2582.md) | May 9, 2023 |
| Linux | lua-libs almalinux 9 | 5.4.4-3.el9 | [ALSA-2023:2582](https://patchblox.com/security/data/fix/linux/alsa-2023-2582.md) | May 9, 2023 |
| Linux | lua-libs ol 9 | 0:5.4.4-3.el9 | [ELSA-2023-2582](https://patchblox.com/security/data/fix/linux/elsa-2023-2582.md) | May 15, 2023 |
| Linux | lua5.4 Debian 12.15 (bookworm) | 5.4.4-2 | [DEBIAN-CVE-2022-28805](https://patchblox.com/security/data/fix/linux/debian-cve-2022-28805.md) | Apr 8, 2022 |
| Linux | lua5.4 Debian 13.5 (trixie) | 5.4.4-2 | [DEBIAN-CVE-2022-28805](https://patchblox.com/security/data/fix/linux/debian-cve-2022-28805.md) | Apr 8, 2022 |
| Linux | lua5.4 Debian 14 | 5.4.4-2 | [DEBIAN-CVE-2022-28805](https://patchblox.com/security/data/fix/linux/debian-cve-2022-28805.md) | Apr 8, 2022 |
| Linux | lua5.4 Ubuntu 22.04.1 LTS (jammy) | 5.4.4-1ubuntu0.1~esm1 | [lua5.4 5.4.4-1ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-lua5.4-5.4.4-1ubuntu0.1-esm1.md) | Jul 1, 2022 |

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