CVE-2025-0241 — Missing Release of Memory after Effective Lifetime in Mozilla Firefox

CWE-401 — Missing Release of Memory after Effective LifetimeCWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer13 documents8 sources
Severity
7.7HIGHNVD
OSV5.4
EPSS
0.1%
top 77.58%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
2
Mozilla ThunderbirdMozilla Firefox
Timeline
PublishedJan 7
Latest updateFeb 2

Description

When segmenting specially crafted text, segmentation would corrupt memory leading to a potentially exploitable crash. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:LExploitability: 2.2 | Impact: 5.5

Affected Packages4 packages

▶NVDmozilla/firefox< 128.6.0+1
▶NVDmozilla/thunderbird129.0 — 134.0+1
▶Ubuntumozilla/firefox< 134.0+build1-0ubuntu0.20.04.1
▶Debianmozilla/thunderbird< 1:128.6.0esr-1~deb11u1+3

🔴Vulnerability Details

4
OSV
firefox vulnerabilities↗2025-01-09
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OSV
CVE-2025-0241: When segmenting specially crafted text, segmentation would corrupt memory leading to a potentially exploitable crash↗2025-01-07
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GHSA
GHSA-hh4j-jwjv-8726: When segmenting specially crafted text, segmentation would corrupt memory leading to a potentially exploitable crash↗2025-01-07
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CVEList
Memory corruption when using JavaScript Text Segmentation↗2025-01-07
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📋Vendor Advisories

8
Ubuntu
Thunderbird vulnerabilities↗2026-02-02
▶
Ubuntu
Firefox vulnerabilities↗2025-01-09
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Red Hat
firefox: Memory corruption when using JavaScript Text Segmentation↗2025-01-07
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Debian
CVE-2025-0241: firefox - When segmenting specially crafted text, segmentation would corrupt memory leadin...↗2025
▶
Mozilla
Mozilla Foundation Security Advisory 2025-02: CVE-2025-0241↗
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CVE-2025-0241 — Mozilla Firefox vulnerability | cvebase