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7.7 High

CVE-2025-0241 When segmenting specially crafted text, segmentation would corrupt memory leading to a potentially exploitable crash

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.

Affected products and versions

Product Affected versions Fixed in
Firefox 134 earliest → < 134 134
Firefox 128.6 earliest → < 128.6 128.6
Firefox ESR 128.6 earliest → < 128.6 128.6
Thunderbird 134 earliest → < 134 134
Thunderbird 128.6 earliest → < 128.6 128.6

Other CVEs of Firefox

The 2221 CVEs of Firefox →
CVE-2026-120572 Incorrect boundary conditions in the Layout: Block and Inline component 8.8 High CVE-2026-118027 Frame poisoning in the Layout component 9.1 Critical CVE-2026-118025 Other issue in the SVG component 8.8 High CVE-2026-118024 Use-after-free in the Graphics: Text component 8.8 High
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