Use After Free in Lua

CVE-2021-44964

Use after free in garbage collector and finalizer of lgc.c in Lua interpreter 5.4.0~5.4.3 allows attackers to perform Sandbox Escape via a crafted script file.

Vulnerability class: Use-After-Free

EPSS: 0.010 (58.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:C/C:N/I:N/A:H.

Affected products

  • Lua
  • N/a — versions n/a

Weakness classification (CWE)

Public proof-of-concept exploits

References

  • cve@mitre.org (Technical Description, Exploit, Mailing List, x_refsource_MISC, Vendor Advisory)
  • cve@mitre.org (Exploit, Mailing List, x_refsource_MISC, Vendor Advisory)
  • cve@mitre.org (Mailing List, x_refsource_MISC, Vendor Advisory)
  • cve@mitre.org (Mailing List, x_refsource_MISC, Vendor Advisory)
  • cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-44964?
CVE-2021-44964 is a medium-severity vulnerability in Lua, classified under Use After Free. CVSS score: 6.3/10. Published 2022-03-14.
How severe is CVE-2021-44964?
Medium severity. CVSS v3 base score is 6.3 out of 10.
Is CVE-2021-44964 known to be exploited?
1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.