CVE-2019-6706
Lua 5.3.5 has a use-after-free in lua_upvaluejoin in lapi.c. For example, a crash outcome might be achieved by an attacker who is able to trigger a debug.upvaluejoin call in which the arguments have
02 Description
Lua 5.3.5 has a use-after-free in lua_upvaluejoin in lapi.c. For example, a crash outcome might be achieved by an attacker who is able to trigger a debug.upvaluejoin call in which the arguments have
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
- 17.35% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 97.0% of scored records. A rank, not a probability.
- NVD base score
- 7.5 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/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
- 2019-01-23 00:00Z7 YR AGO
- Last updated
- 2024-08-04 20:31Z2 YR AGO
- Reserved
- 2019-01-23
- Assigning CNA
- mitre
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-416Use After FreeVariant
- Data version
- 5.1
- Document digest
- f2009adb860c72484d2b93b2d52f9003db807ad05c5f8c75c87131f55b2c84da
05 Affected products
06 References
- packetstormsecurity.comhttp://packetstormsecurity.com/files/151335/Lua-5.3.5-Use-After-Free.html
- github.comhttps://github.com/Lua-Project/cve-analysis/blob/a43c9ccd00274b31fa2f24c6c8f20ce36655682d/CVE-2019-6706.pdf
- github.comhttps://github.com/lua/lua/commit/89aee84cbc9224f638f3b7951b306d2ee8ecb71e
- lua-users.orghttp://lua-users.org/lists/lua-l/2019-01/msg00039.html
- access.redhat.comhttps://access.redhat.com/security/cve/cve-2019-6706
- lists.debian.org[debian-lts-announce] 20230622 [SECURITY] [DLA 3469-1] lua5.3 security updatehttps://lists.debian.org/debian-lts-announce/2023/06/msg00031.html
07 Fixed in
AlmaLinux 8
- lua Fixed in 5.3.4-11.el8
- lua-devel Fixed in 5.3.4-11.el8
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- lua Fixed in 5.3.4-11.el8
- lua-devel Fixed in 5.3.4-11.el8
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- lua5.3 Fixed in 5.3.6-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- lua5.3 Fixed in 5.3.6-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- lua5.3 Fixed in 5.3.6-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 16.04 LTS
- lua5.3 Fixed in 5.3.1-1ubuntu2.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- lua5.3 Fixed in 5.3.3-1ubuntu0.18.04.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.