Vulnerability · Published Mar 4, 2025 · Assigned by mozilla
CVE-2025-1934Unexpected GC during RegExp bailout processing
Medium 6.5
In plain English
A medium-severity security flaw in Firefox from Mozilla. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 39% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)6.5Medium
Exploit odds (30 days)0.5%top 60.5% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
It was possible to interrupt the processing of a RegExp bailout and run additional JavaScript, potentially triggering garbage collection when the engine was not expecting it. This vulnerability was fixed in Firefox 136, Firefox ESR 128.8, Thunderbird 136, and Thunderbird 128.8.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| AlmaLinux:8 | firefox | 128.8.0-1.el8_10 | ALSA-2025:2452 |
| AlmaLinux:9 | firefox | 128.8.0-1.el9_5 | ALSA-2025:2359 |
| AlmaLinux:9 | firefox-x11 | 128.8.0-1.el9_5 | ALSA-2025:2359 |
| Debian:12 | firefox-esr | 128.8.0esr-1~deb12u1 | DSA-5874-1 |
| Debian:12 | firefox-esr | 128.8.0esr-1~deb12u1 | DEBIAN-CVE-2025-1934 |
| Debian:13 | firefox-esr | 128.8.0esr-1 | DEBIAN-CVE-2025-1934 |
| Debian:14 | firefox-esr | 128.8.0esr-1 | DEBIAN-CVE-2025-1934 |
| Debian:12 | thunderbird | 1:128.8.0esr-1~deb12u1 | DEBIAN-CVE-2025-1934 |
| Debian:12 | thunderbird | 1:128.8.0esr-1~deb12u1 | DSA-5876-1 |
| Debian:13 | thunderbird | 1:128.8.0esr-1 | DEBIAN-CVE-2025-1934 |
| Debian:14 | thunderbird | 1:128.8.0esr-1 | DEBIAN-CVE-2025-1934 |
| Rocky Linux:8 | firefox | 0:128.8.0-1.el8_10 | RLSA-2025:2452 |
| Ubuntu:22.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2025-1934 |
| Ubuntu:24.04:LTS | mozjs102 | no fix listed | UBUNTU-CVE-2025-1934 |
| Ubuntu:24.04:LTS | mozjs115 | no fix listed | UBUNTU-CVE-2025-1934 |
| Ubuntu:22.04:LTS | mozjs78 | no fix listed | UBUNTU-CVE-2025-1934 |
| Ubuntu:22.04:LTS | mozjs91 | no fix listed | UBUNTU-CVE-2025-1934 |
| Ubuntu:22.04:LTS | thunderbird | 1:128.12.0+build1-0ubuntu0.22.04.1 | UBUNTU-CVE-2025-1934 |
| Ubuntu:22.04:LTS | thunderbird | 1:128.12.0+build1-0ubuntu0.22.04.1 | USN-7663-1 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Mozilla | Firefox | see references |
| Mozilla | Thunderbird | see references |
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1942881
- https://www.mozilla.org/security/advisories/mfsa2025-14/
- https://www.mozilla.org/security/advisories/mfsa2025-16/
- https://www.mozilla.org/security/advisories/mfsa2025-17/
- https://www.mozilla.org/security/advisories/mfsa2025-18/
- https://lists.debian.org/debian-lts-announce/2025/03/msg00006.html