Home/CVE/Lua 5.4.0 (fixed in 5.4.1) has a segmentation fault in changedline in ldebug.c (e.g., when called by luaG_traceexec) bec
CVE

CVE-2020-15945

Lua 5.4.0 (fixed in 5.4.1) has a segmentation fault in changedline in ldebug.c (e.g., when called by luaG_traceexec) bec

Lua 5.4.0 (fixed in 5.4.1) has a segmentation fault in changedline in ldebug.c (e.g., when called by luaG_traceexec) because it incorrectly expects that an oldpc value is always updated upon a return of the flow of control to a function.

MEDIUM · CVSS 5.5 EPSS 0.00158
Schedule remediation
  • Public exploit or PoC is available
Sigma rules0 YARA rules0
▤

Affected Products & Versions

1
lua>= 5.3.1 and < 5.4.0
⚠

Public Exploits & PoCs

1
poclua-users.org · msg00123.htmllua-users.org
▣

Scoring & Timeline

5.5
MEDIUM · CVSS v3.1 · cve@mitre.org
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD24 Jul 2020 · 09:15 PM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

3
suse-csafopenSUSE-SU-2025:15401-1
suse-csafopenSUSE-SU-2024:11029-1
msrcCVE-2020-15945
🔗

References & Sources

2
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://github.com/lua/lua/commit/a2195644d89812e5b157ce7bac35543e06db05e3PatchThird Party Advisory
https://www.lua.org/bugs.html#5.4.0-8
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