What’s Vulnerable › Vulnerabilities

CVE-2021-26958

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-02-09 · updated 2026-06-17
• Weakness: CWE-252

Description

An issue was discovered in the xcb crate through 2021-02-04 for Rust. It has a soundness violation because transmutation to the wrong type can happen after xcb::base::cast_event uses std::mem::transmute to return a reference to an arbitrary type.

Affected products

• Xcb Project Xcb: through 2021-02-04

References

• https://rustsec.org/advisories/RUSTSEC-2021-0019.html
• https://rustsec.org/advisories/RUSTSEC-2021-0019.html

Get alerted when CVE-2021-26958 or the next vulnerability affects your stack