CVE-2026-55406Medium▾ SunlitBuffa has a Use-After-Free in OwnedView via Unsound 'static Lifetime Promotion in Deref
▾ Sunlit zone — Low / medium · no exploitation signal
impact 27.5 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 28.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via GHSA
0.2%
A soundness bug in buffa's OwnedView<V> allowed safe Rust code to trigger a use-after-free. The OwnedView::decode constructor transmuted a borrowed slice to &'static [u8], and the Deref implementation exposed the promoted 'static lifetime on borrowed view fields (such as &'static str and &'static [u8]) to callers. Because these references appeared to be 'static, the borrow checker permitted them to outlive the OwnedView; once the OwnedView was dropped and its backing buffer freed, those references became dangling, enabling memory corruption, information disclosure of freed heap contents, and cross-thread misuse — all without any unsafe code in the calling application. Users are advised to update to the latest patched version of buffa.
Thank you to hackerone.com/suul for reporting this issue.
buffa < 0.7.0Upgrade to a patched release:
buffa 0.7.0Connected by shared product, vendor, weakness, or advisory.
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