Out-of-bounds Read in Lua
CVE-2022-28805
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.
Vulnerability class: Buffer Overflow
EPSS: 0.030 (86.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
Affected products
- Lua
- Fedoraproject Fedora — versions 35, 36
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Exploit, Mailing List, Third Party Advisory)
- cve@mitre.org (Exploit, Mailing List, Third Party Advisory)
- cve@mitre.org (Exploit, Mailing List, Third Party Advisory)
- cve@mitre.org (Patch, Third Party Advisory)
- cve@mitre.org (vendor-advisory, Third Party Advisory)
- cve@mitre.org (vendor-advisory, Third Party Advisory)
- cve@mitre.org (vendor-advisory, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-28805?
- CVE-2022-28805 is a critical-severity vulnerability in Lua, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2022-04-08.
- How severe is CVE-2022-28805?
- Critical severity. CVSS v3 base score is 9.1 out of 10.
- Is CVE-2022-28805 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.