01 Record

CVE-2021-43519

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.

UnratedPUBLISHEDCNA: mitre

CNA base scoreUnratedNo CNA CVSS vector

View raw JSON

02 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.

03 Exploitation and scoring

Exploitation: Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
SSVC decision: Not assessed by CISA
EPSS probability: 1.22% probability of exploitation activity in the next 30 days.
EPSS percentile: Equal to or higher than the score of 68.7% of scored records. A rank, not a probability.
NVD base score: 5.5 (CVSS v3.x), scored by the NVD independently of the CNA.
NVD CVSS vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
NVD analysis status: Modified. NVD last modified this record on 2026-06-17.
Red Hat severity: Moderate. Red Hat's rating for its own products, not a CVSS rating.

Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.

04 Metadata

Published

2021-11-09 12:26Z4 YR AGO

Last updated

2024-08-04 03:55Z2 YR AGO

Reserved

2021-11-08

Assigning CNA

mitre

Record state

PUBLISHED

Severity

Not rated by the issuing CNA

CNA CVSS vector

Not published by the issuing CNA

Weaknesses

CWE-674Uncontrolled RecursionClass
CWE-787Out-of-bounds WriteBase

Data version

5.1

Document digest

227d52d0a76cfafc7b6138533520d97792fe014687f1eef73650227e5187dcca

05 Affected products

VendorProductVersionsPlatforms

fedoraprojectfedoraNot specified—

lualuaNot specified—

redhatenterprise_linuxNot specified—

redhatjboss_core_servicesNot specified—

redhatrhel_eusNot specified—

06 References

lua-users.orghttp://lua-users.org/lists/lua-l/2021-10/msg00123.htmlx_refsource_MISC
lua-users.orghttp://lua-users.org/lists/lua-l/2021-11/msg00015.htmlx_refsource_MISC
lists.fedoraproject.orgFEDORA-2022-e6b2bd5b50https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/C7XHFYHGSZKL53VCLSJSAJ6VMFGAIXKO/vendor-advisoryx_refsource_FEDORA
lists.fedoraproject.orgFEDORA-2022-473560d1a6https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/P3EMGAQ5Y6GXJLY4K5DUOOEQT4MZ4J4F/vendor-advisoryx_refsource_FEDORA

07 Fixed in

AlmaLinux 9

lua
Fixed in 5.4.4-2.el9_1
lua-devel
Fixed in 5.4.4-2.el9_1
lua-libs
Fixed in 5.4.4-2.el9_1

Arch Linux

lua
Fixed in 5.4.4-1
lua51
No fix yet
lua52
No fix yet
lua53
No fix yet

Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.

CloudLinux 9

lua
Fixed in 5.4.4-2.el9_1
lua-devel
Fixed in 5.4.4-2.el9_1
lua-libs
Fixed in 5.4.4-2.el9_1

Derived from AlmaLinux 9. Partial coverage: only packages taken from AlmaLinux 9 are listed.

Debian 12

lua5.4
Fixed in 5.4.4-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 13

lua5.4
Fixed in 5.4.4-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.

Debian 14

lua5.4
Fixed in 5.4.4-1

Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.