Bug 2459689 (CVE-2026-6654)

Summary: CVE-2026-6654 thin-vec: mozilla/thin-vec: Memory corruption vulnerability via Double-Free/Use-After-Free
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: high Docs Contact:
Priority: high    
Version: unspecifiedCC: bbrownin, gotiwari, jgrulich, jhorak, mvyas, tpopela
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the `thin_vec` component of `mozilla/thin-vec`. This vulnerability involves a memory management error known as a Double-Free/Use-After-Free (UAF), which occurs in the `IntoIter::drop` and `ThinVec::clear` functions. When a specific error condition (a panic in `ptr::drop_in_place`) is triggered, the system fails to correctly manage memory, potentially allowing an attacker to execute malicious code or cause the application to crash, leading to a denial of service.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-04-20 11:01:19 UTC
Double-Free / Use-After-Free (UAF) in the `IntoIter::drop` and `ThinVec::clear` functions in the thin_vec crate. A panic in `ptr::drop_in_place` skips setting the length to zero.