Vulnerability in Lua
CVE-2021-44647
Lua v5.4.3 and above are affected by SEGV by type confusion in funcnamefromcode function in ldebug.c which can cause a local denial of service.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (33.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 34th percentile — 33.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Lua — versions 5.4.3
- Fedoraproject Fedora — versions 34
Weakness classification (CWE)
References
- lua-users.org/lists/lua-l/2021-11/msg00195.html (Exploit, Mailing List, Vendor Advisory)
- lua-users.org/lists/lua-l/2021-11/msg00204.html (Patch, Mailing List, Vendor Advisory)
- lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/… (vendor-advisory)
- access.redhat.com/security/cve/cve-2021-44647 (Third Party Advisory)
- security.gentoo.org/glsa/202305-23 (vendor-advisory)
Frequently asked questions
- What is CVE-2021-44647?
- CVE-2021-44647 is a medium-severity vulnerability in Lua, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 5.5/10. Published 2022-01-11.
- How severe is CVE-2021-44647?
- Medium severity. CVSS v3 base score is 5.5 out of 10.