Answer in brief
CVE-2026-55406 records a Medium severity (CVSS 5.9) vulnerability in Buffa has a Use-After-Free in OwnedView via Unsound 'static Lifetime Promotion in Deref. The current sources do not mark it as known exploited. The current feed maps buffa (rust). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 5.9. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps buffa (rust). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| buffarust | <0.7.0 | 0.7.0 |
Published upstream
Jul 16, 2026
Evidence: source:ghsa:source_dates:source-dates:recordSource modified
Aug 28, 2026
Evidence: source:ghsa:source_dates:source-dates:recordFirst seen by HOL
Jul 16, 2026
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.
Quoted source text, attributed separately from HOL analysis.