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Vulnerability · Published Nov 9, 2021 · Assigned by mitre

CVE-2021-43519

Medium 5.5

In plain English

A medium-severity security flaw in the lua package (AlmaLinux). There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 1.2% (higher than 69% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)5.5Medium
Exploit odds (30 days)1.2%top 31.0% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known

Official description

Stack overflow in lua_resume of ldo.c in Lua Interpreter 5.1.0~5.4.4 allows attackers to perform a Denial of Service via a crafted script file.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:9lua5.4.4-2.el9_1ALSA-2023:0957
AlmaLinux:9lua-devel5.4.4-2.el9_1ALSA-2023:0957
AlmaLinux:9lua-libs5.4.4-2.el9_1ALSA-2023:0957
Debian:12lua5.45.4.4-1DEBIAN-CVE-2021-43519
Debian:13lua5.45.4.4-1DEBIAN-CVE-2021-43519
Debian:14lua5.45.4.4-1DEBIAN-CVE-2021-43519
Rocky Linux:9lua0:5.4.4-2.el9_1RLSA-2023:0957
Ubuntu:22.04:LTSbamno fix listedUBUNTU-CVE-2021-43519
Ubuntu:24.04:LTSbamno fix listedUBUNTU-CVE-2021-43519
Ubuntu:25.10bamno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.04:LTSbamno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.10bamno fix listedUBUNTU-CVE-2021-43519
Ubuntu:22.04:LTSblobbyno fix listedUBUNTU-CVE-2021-43519
Ubuntu:24.04:LTSblobbyno fix listedUBUNTU-CVE-2021-43519
Ubuntu:25.10blobbyno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.04:LTSblobbyno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.10blobbyno fix listedUBUNTU-CVE-2021-43519
Ubuntu:22.04:LTSdarktableno fix listedUBUNTU-CVE-2021-43519
Ubuntu:24.04:LTSdarktableno fix listedUBUNTU-CVE-2021-43519
Ubuntu:25.10darktableno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.04:LTSdarktableno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.10darktableno fix listedUBUNTU-CVE-2021-43519
Ubuntu:22.04:LTSejano fix listedUBUNTU-CVE-2021-43519
Ubuntu:22.04:LTSemscriptenno fix listedUBUNTU-CVE-2021-43519
Ubuntu:24.04:LTSemscriptenno fix listedUBUNTU-CVE-2021-43519
Ubuntu:25.10emscriptenno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.04:LTSemscriptenno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.10emscriptenno fix listedUBUNTU-CVE-2021-43519
Ubuntu:22.04:LTSfreedroidrpgno fix listedUBUNTU-CVE-2021-43519
Ubuntu:24.04:LTSfreedroidrpgno fix listedUBUNTU-CVE-2021-43519
Ubuntu:25.10freedroidrpgno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.04:LTSfreedroidrpgno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.10freedroidrpgno fix listedUBUNTU-CVE-2021-43519
Ubuntu:22.04:LTSfs-uaeno fix listedUBUNTU-CVE-2021-43519
Ubuntu:24.04:LTSfs-uaeno fix listedUBUNTU-CVE-2021-43519
Ubuntu:25.10fs-uaeno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.04:LTSfs-uaeno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.10fs-uaeno fix listedUBUNTU-CVE-2021-43519
Ubuntu:22.04:LTSgollyno fix listedUBUNTU-CVE-2021-43519
Ubuntu:24.04:LTSgollyno fix listedUBUNTU-CVE-2021-43519
Ubuntu:25.10gollyno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.04:LTSgollyno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.10gollyno fix listedUBUNTU-CVE-2021-43519
Ubuntu:22.04:LTSgoxelno fix listedUBUNTU-CVE-2021-43519
Ubuntu:24.04:LTSgoxelno fix listedUBUNTU-CVE-2021-43519
Ubuntu:25.10goxelno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.04:LTSgoxelno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.10goxelno fix listedUBUNTU-CVE-2021-43519
Ubuntu:22.04:LTSnaevno fix listedUBUNTU-CVE-2021-43519
Ubuntu:24.04:LTSnaevno fix listedUBUNTU-CVE-2021-43519
Ubuntu:25.10naevno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.04:LTSnaevno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.10naevno fix listedUBUNTU-CVE-2021-43519
Ubuntu:22.04:LTSrust-lua52-sysno fix listedUBUNTU-CVE-2021-43519
Ubuntu:24.04:LTSrust-lua52-sysno fix listedUBUNTU-CVE-2021-43519
Ubuntu:25.10rust-lua52-sysno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.04:LTSrust-lua52-sysno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.10rust-lua52-sysno fix listedUBUNTU-CVE-2021-43519
Ubuntu:22.04:LTSsciteno fix listedUBUNTU-CVE-2021-43519
Ubuntu:24.04:LTSsciteno fix listedUBUNTU-CVE-2021-43519
Ubuntu:25.10sciteno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.04:LTSsciteno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.10sciteno fix listedUBUNTU-CVE-2021-43519
Ubuntu:22.04:LTSscorched3dno fix listedUBUNTU-CVE-2021-43519
Ubuntu:24.04:LTSscorched3dno fix listedUBUNTU-CVE-2021-43519
Ubuntu:25.10scorched3dno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.04:LTSscorched3dno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.10scorched3dno fix listedUBUNTU-CVE-2021-43519
Ubuntu:22.04:LTStarantoolno fix listedUBUNTU-CVE-2021-43519
Ubuntu:24.04:LTStarantoolno fix listedUBUNTU-CVE-2021-43519
Ubuntu:25.10tarantoolno fix listedUBUNTU-CVE-2021-43519
Ubuntu:22.04:LTStupno fix listedUBUNTU-CVE-2021-43519
Ubuntu:24.04:LTStupno fix listedUBUNTU-CVE-2021-43519
Ubuntu:25.10tupno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.04:LTStupno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.10tupno fix listedUBUNTU-CVE-2021-43519
Ubuntu:22.04:LTSvifmno fix listedUBUNTU-CVE-2021-43519
Ubuntu:24.04:LTSvifmno fix listedUBUNTU-CVE-2021-43519
Ubuntu:25.10vifmno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.04:LTSvifmno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.10vifmno fix listedUBUNTU-CVE-2021-43519
Ubuntu:22.04:LTSwccno fix listedUBUNTU-CVE-2021-43519
Ubuntu:24.04:LTSwccno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.04:LTSwccno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.10wccno fix listedUBUNTU-CVE-2021-43519
Ubuntu:22.04:LTSwidelandsno fix listedUBUNTU-CVE-2021-43519
Ubuntu:24.04:LTSwidelandsno fix listedUBUNTU-CVE-2021-43519
Ubuntu:25.10widelandsno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.04:LTSwidelandsno fix listedUBUNTU-CVE-2021-43519
Ubuntu:26.10widelandsno fix listedUBUNTU-CVE-2021-43519

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

References