CVE-2025-3032: Mozjs52 · Leaking of file descriptors from the fork server to web content processes could allow for
Affects mozjs52Source GCVE Database
Not known to be exploited · CVSS 7.4 High : upgrade to 1:140.7.1+build1-0ubuntu0.22.04.1 soon.
Data as of 28 Oct 2026, 22:28 UTC
- Patch
- Available – fixed in 1:140.7.1+build1-0ubuntu0.22.04.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:NExploitation evidence
Disclosed: evidence found.
CVE published 1 Apr 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Upgrade the Ubuntu thunderbird package to 1:140.7.1+build1-0ubuntu0.22.04.1.
Patches and advisories
Affected software
| Product | Affected | Fixed in |
|---|---|---|
Ubuntu 24.04 LTSmozjs102pkg:deb/ubuntu/mozjs102?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 24.04 LTSmozjs115pkg:deb/ubuntu/mozjs115?arch=source&distro=nobleOther threats | Affected
| Fixed in– |
Ubuntu 22.04 LTSmozjs102pkg:deb/ubuntu/mozjs102?arch=source&distro=jammyOther threats | Affected
| Fixed in– |
Ubuntu 22.04 LTSmozjs78pkg:deb/ubuntu/mozjs78?arch=source&distro=jammyOther threats | Affected
| Fixed in– |
Ubuntu 22.04 LTSmozjs91pkg:deb/ubuntu/mozjs91?arch=source&distro=jammyOther threats | Affected
| Fixed in– |
Ubuntu 22.04 LTSthunderbirdpkg:deb/ubuntu/thunderbird?arch=source&distro=jammyOther threats | Affected
| Fixed in
|
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
Description
Leaking of file descriptors from the fork server to web content processes could allow for privilege escalation attacks. This vulnerability was fixed in Firefox 137 and Thunderbird 137.
References
- ubuntu.com/security/CVE-2025-3032 (opens in a new tab)
- cve.org/CVERecord?id=CVE-2025-3032 (opens in a new tab)
- mozilla.org/en-US/security/advisories/mfsa2025-20/ (opens in a new tab)
- bugzilla.mozilla.org/show_bug.cgi?id=1949987 (opens in a new tab)
- mozilla.org/security/advisories/mfsa2025-20/ (opens in a new tab)
- mozilla.org/security/advisories/mfsa2025-23/ (opens in a new tab)
- ubuntu.com/security/notices/USN-7991-1 (opens in a new tab)