Vulnerability Description
Buffa is a pure-Rust Protocol Buffers implementation with first-class protobuf editions support. Prior to 0.7.0, a soundness bug in the OwnedView<V> type 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, so the borrow checker permitted those references to outlive the OwnedView; once the OwnedView was dropped and its backing buffer freed, the references became dangling, enabling memory corruption, information disclosure of freed heap contents, and cross-thread misuse without any unsafe code in the calling application. This issue is fixed in version 0.7.0.
Related Weaknesses (CWE)
References
- https://github.com/anthropics/buffa/commit/7dcf50a1a40eca6ed8d6c6dd59f4310aa0d68
- https://github.com/anthropics/buffa/pull/154
- https://github.com/anthropics/buffa/releases/tag/v0.7.0
- https://github.com/anthropics/buffa/security/advisories/GHSA-9pwq-gcrx-wghh
FAQ
What is CVE-2026-55406?
CVE-2026-55406 is a documented vulnerability. Buffa is a pure-Rust Protocol Buffers implementation with first-class protobuf editions support. Prior to 0.7.0, a soundness bug in the OwnedView<V> type allowed safe Rust code to trigger a use-after-...
How severe is CVE-2026-55406?
CVSS scoring is not yet available for CVE-2026-55406. Check NVD for updates.
Is there a patch for CVE-2026-55406?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.