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CVE-2023-0616

2026-10-07T14:22:47.857025+00:00

Affected: Mozilla Thunderbird

If a MIME email combines OpenPGP and OpenPGP MIME data in a certain way Thunderbird repeatedly attempts to process and display the message, which could cause Thunderbird's user interface to lock up and no longer respond to the user's actions. An attacker could send a crafted message with this structure to attempt a DoS attack. This vulnerability affects Thunderbird < 102.8.

RHSA-2023:0817 — Red Hat Security Advisory: thunderbird security update

2026-10-07T14:22:47.857127+00:00

Mozilla: User Interface lockup with messages combining S/MIME and OpenPGP Mozilla: Content security policy leak in violation reports using iframes Mozilla: Extensions could have opened external schemes without user knowledge Mozilla: Screen hijack via browser fullscreen mode Mozilla: Out of bounds memory write from EncodeInputStream Mozilla: Potential use-after-free from compartment mismatch in SpiderMonkey Mozilla: Invalid downcast in SVGUtils::SetupStrokeGeometry Mozilla: Use-after-free in mozilla::dom::ScriptLoadContext::~ScriptLoadContext Mozilla: Web Crypto ImportKey crashes tab Mozilla: Fullscreen notification not shown in Firefox Focus Mozilla: Memory safety bugs fixed in Firefox 110 and Firefox ESR 102.8 Mozilla: Memory safety bugs fixed in Firefox ESR 102.8

RHSA-2023:0818 — Red Hat Security Advisory: thunderbird security update

2026-10-07T14:22:47.857173+00:00