Description (CNA)
Several buffer-growth sites in libmime performed size arithmetic in 32-bit types without overflow checks. On a sufficiently large message the growth guard could fail open, or the buffer could be reallocated smaller than required, and a subsequent memcpy would then write attacker-controlled data across adjacent heap allocations. This vulnerability was fixed in Thunderbird 158.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Mozilla / Thunderbird | unaffected 158 through * |
CWE
No CWE identifiers supplied.
References
- https://bugzilla.mozilla.org/show_bug.cgi?id=2071621
- https://www.mozilla.org/security/advisories/mfsa2026-109/
ADP enrichment
No English description supplied.
No references supplied.