Bug 2556402 (CVE-2026-113869) - CVE-2026-113869 thunderbird: thunderbird: Use-after-free via S/MIME decryption password prompt
Summary: CVE-2026-113869 thunderbird: thunderbird: Use-after-free via S/MIME decryptio...
Keywords:
Status: NEW
Alias: CVE-2026-113869
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-20 19:31 UTC by OSIDB Bzimport
Modified: 2026-10-20 19:37 UTC (History)
5 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-10-20 19:31:39 UTC 
When Thunderbird asked for a security device password (for example a smartcard PIN or the Primary Password) while decrypting an S/MIME message, the message load could finish or be cancelled while the prompt was open. This freed the message decoder while it was still in use, causing a use-after-free and a potentially exploitable crash. This vulnerability was fixed in Thunderbird 158.0.1.
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