CVE-2022-33099
CVE-2022-33099 is a high-severity vulnerability in Lua with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-787.
Key facts
- Severity: High (CVSS 3.x base score 7.5)
- CVSS v2: 5.0
- EPSS exploit prediction: 2% (83rd percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-787
- Affected product: Lua
- Published:
- Last modified:
Description
An issue in the component luaG_runerror of Lua v5.4.4 and below leads to a heap-buffer overflow when a recursive error occurs.
Frequently asked questions
- What is CVE-2022-33099?
- An issue in the component luaG_runerror of Lua v5.4.4 and below leads to a heap-buffer overflow when a recursive error occurs.
- How severe is CVE-2022-33099?
- CVE-2022-33099 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
- Is CVE-2022-33099 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (83rd percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2022-33099?
- CVE-2022-33099 primarily affects Lua. In total, 3 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2022-33099?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2022-33099 published?
- CVE-2022-33099 was published on 2022-07-01 and last updated on 2026-06-17.
References
- https://github.com/lua/lua/commit/42d40581dd919fb134c07027ca1ce0844c670daf
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RJNJ66IFDUKWJJZXHGOLRGIA3HWWC36R/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UHYZOEFDVLVAD6EEP4CDW6DNONIVVHPA/
- https://lua-users.org/lists/lua-l/2022-05/msg00035.html
- https://lua-users.org/lists/lua-l/2022-05/msg00042.html
- https://lua-users.org/lists/lua-l/2022-05/msg00073.html
- https://www.lua.org/bugs.html#Lua-stack%20overflow%20when%20C%20stack%20overflows%20while%20handling%20an%20error:~:text=Lua-stack%20overflow%20when%20C%20stack%20overflows%20while%20handling%20an%20error
Affected products (3)
- cpe:2.3:a:lua:lua:*:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:*
- cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:*
More vulnerabilities in Lua
- CVE-2020-15889 — Critical (CVSS 9.8): Lua 5.4.0 has a getobjname heap-based buffer over-read because youngcollection in lgc.c uses markold for an…
- CVE-2022-28805 — Critical (CVSS 9.1): singlevar in lparser.c in Lua from (including) 5.4.0 up to (excluding) 5.4.4 lacks a certain luaK_exp2anyregup call,…
- CVE-2020-15888 — High (CVSS 8.8): Lua through 5.4.0 mishandles the interaction between stack resizes and garbage collection, leading to a heap-based…
- CVE-2020-24342 — High (CVSS 7.8): Lua through 5.4.0 allows a stack redzone cross in luaO_pushvfstring because a protection mechanism wrongly calls…
- CVE-2021-45985 — High (CVSS 7.5): In Lua 5.4.3, an erroneous finalizer called during a tail call leads to a heap-based buffer over-read.
- CVE-2020-24369 — High (CVSS 7.5): ldebug.c in Lua 5.4.0 attempts to access debug information via the line hook of a stripped function, leading to a NULL…
Other CWE-787 (Out-of-bounds Write) vulnerabilities
- CVE-2026-42369 — Critical (CVSS 10.0): GV-VMS V20 is a Video Monitoring Software used to gather the feeds of many surveillance cameras and manage other…
- CVE-2026-4746 — Critical (CVSS 10.0): Out-of-bounds Write vulnerability in timeplus-io proton (base/poco/Foundation/src modules). This vulnerability is…
- CVE-2025-43300 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in iOS 15.8.5 and iPadOS…
- CVE-2025-24201 — Critical (CVSS 10.0): An out-of-bounds write issue was addressed with improved checks to prevent unauthorized actions. This issue is fixed in…
- CVE-2024-42479 — Critical (CVSS 10.0): llama.cpp provides LLM inference in C/C++. The unsafe `data` pointer member in the `rpc_tensor` structure can cause…
- CVE-2024-39791 — Critical (CVSS 10.0): Stack-based buffer overflow vulnerabilities affecting Vonets industrial wifi bridge relays and wifi bridge…