CVE-2023-5171: debian debian_linux Use After Free
CVSS: 6.5v3.1MediumModified
AliasesUBUNTU-CVE-2023-5171DEBIAN-CVE-2023-5171CGA-3w22-rqmv-rxcjCGA-rpgr-vfm6-xxcm
Published 27-09-2023Last modified 13-02-2025
Vulnerability summary
CVE-2023-5171 is a medium (CVSS 6.5) Use After Free vulnerability in debian debian_linux. EPSS estimates a 1.12% chance of exploitation in the next 30 days, higher than 65.5% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.1 (NVD)EPSS score
1.12%
0%100%
Low · +0.09 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 30 · Related 10DLA-3587-1DLA-3601-1DSA-5506-1DSA-5513-1MGASA-2023-0285OPENSUSE-SU-2024:13268-1OPENSUSE-SU-2024:13272-1OPENSUSE-SU-2024:14572-1RHSA-2023:5426RHSA-2023:5427RHSA-2023:5428RHSA-2023:5429RHSA-2023:5430RHSA-2023:5432RHSA-2023:5433RHSA-2023:5434RHSA-2023:5435RHSA-2023:5436RHSA-2023:5437RHSA-2023:5438RHSA-2023:5439RHSA-2023:5440RHSA-2023:5475RHSA-2023:5477SUSE-SU-2023:3837-1SUSE-SU-2023:3898-1SUSE-SU-2023:3899-1SUSE-SU-2023:4016-1USN-6404-1USN-6405-1CGA-P973-654C-6RGV
Timeline
- 27-09-2023PublishedVulnerability first disclosed.
- 13-02-2025Last modifiedVulnerability information updated.
Description
During Ion compilation, a Garbage Collection could have resulted in a use-after-free condition, allowing an attacker to write two NUL bytes, and cause a potentially exploitable crash. This vulnerability affects Firefox < 118, Firefox ESR < 115.3, and Thunderbird < 115.3.
CVSS metrics
4 scores · 4 sources · 1 versionMedium 6.5Preferred score · NVD (NIST)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
- OSV · ChainguardEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
EPSS trend
Probability
1.12%
Chance of exploitation in the next 30 days
Percentile
66%
Versus all other CVEs
30-day change
+0.09 pp
From 1.03% on 19-09-2026
19-09-202619-10-2026
EPSS score1.12%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu8 products
- firefox< 118.0.1+build1-0ubuntu0.20.04.1
- mozjs102All versions (No fix recorded)
- mozjs38All versions (No fix recorded)
- mozjs52All versions (No fix recorded)
- mozjs68All versions (No fix recorded)
Debian3 products
- firefox-esr< 115.3.0esr-1~deb12u1 | < 115.3.0esr-1
- thunderbird< 1:115.3.1-1~deb12u1 | < 1:115.3.0-1
- debian_linuxEOL10.0 | 11.0 | 12.0
Mozilla3 products
- firefox≥ unspecified, < 118 | < 118
- firefox_esr≥ unspecified, < 115.3 | < 115.3
- thunderbird≥ unspecified, < 115.3 | < 115.3
Chainguard1 product
- firefox-esr< 118-r0
Fedoraproject1 product
- fedoraEOL39
5 vendors · 16 products
