Description
A vulnerability was identified in Thunderbird where XPath parsing could trigger undefined behavior due to missing null checks during attribute access. This could lead to out-of-bounds read access and potentially, memory corruption. This vulnerability was fixed in Firefox 138, Firefox ESR 128.10, Thunderbird 138, and Thunderbird 128.10.
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Mozilla Firefox
128.10 to ≤ 128.*unaffected138 to ≤ *unaffected
Mozilla Thunderbird
128.10 to ≤ 128.*unaffected138 to ≤ *unaffected
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=1952465 ↗
- https://www.mozilla.org/security/advisories/mfsa2025-28/ ↗
- https://www.mozilla.org/security/advisories/mfsa2025-29/ ↗
- https://www.mozilla.org/security/advisories/mfsa2025-31/ ↗
- https://www.mozilla.org/security/advisories/mfsa2025-32/ ↗
- https://lists.debian.org/debian-lts-announce/2025/05/msg00024.html ↗