Description
Buffer overflow in the vararg functions in ldo.c in Lua 5.1 through 5.2.x before 5.2.3 allows context-dependent attackers to cause a denial of service (crash) via a small number of arguments to a function with a large number of fixed arguments.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | lua5.1 | 5.1.5-7 | — |
| Debian 14 | lua5.2 | 5.2.3-1 | — |
| Debian 13 | lua5.1 | 5.1.5-7 | — |
| Debian 13 | lua5.2 | 5.2.3-1 | — |
| Debian 12 | lua5.1 | 5.1.5-7 | — |
| Debian 12 | lua5.2 | 5.2.3-1 | — |
| Debian 7 | lua5.1 | 5.1.5-4+deb7u1 | DSA-3015-1 |
| Debian 7 | lua5.2 | 5.2.1-3+deb7u1 | DSA-3016-1 |
| Debian 6.0 | lua5.1 | 5.1.4-5+deb6u1 | DLA-47-1 |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 14.04 LTS | lua5.1 | 5.1.5-5ubuntu0.1 | USN-2338-1 |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | moarvm | 2025.05-1.1 | openSUSE-SU-2025:15247-1 |
Azure Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Azure Linux 3 | ceph | 18.2.2-1 | — |
| Azure Linux 3 | compat-lua | No fix yet | — |
Advisories 5
- USN-2338-1 lua5.1 vulnerability Ubuntu Security Notices (USN) · Apr 22, 2026
- openSUSE-SU-2025:15247-1 moarvm-2025.05-1.1 on GA media SUSE / openSUSE Security Updates · Mar 23, 2026
- DLA-47-1 lua5.1 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3015-1 lua5.1 - security update Debian Security (DSA / DLA) · Mar 9, 2026
- DSA-3016-1 lua5.2 - security update Debian Security (DSA / DLA) · Mar 9, 2026
References
- [oss-security] 20140821 Re: CVE request: possible overflow in vararg functions mailing-list
- USN-2338-1 vendor-advisory
- GLSA-201701-53 vendor-advisory
- [oss-security] 20140827 Re: Lua CVE request [was Re: CVE request: possible overflow in vararg functions] mailing-list
- 69342 vdb-entry
- 59890 third-party-advisory
- MDVSA-2015:144 vendor-advisory
- DSA-3016 vendor-advisory
- [oss-security] 20140821 CVE request: possible overflow in vararg functions mailing-list
- 60869 third-party-advisory
- DSA-3015 vendor-advisory
- 61411 third-party-advisory
- http://www.lua.org/bugs.html#5.2.2-1
- openSUSE-SU-2014:1145 vendor-advisory
- http://advisories.mageia.org/MGASA-2014-0414.html
- GLSA-202305-23 vendor-advisory