What’s Vulnerable › Vulnerabilities

CVE-2021-26956

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-02-09 · updated 2026-06-17

Description

An issue was discovered in the xcb crate through 2021-02-04 for Rust. It has a soundness violation because bytes from an X server can be interpreted as any data type returned by xcb::xproto::GetPropertyReply::value.

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-2021-26956 or the next vulnerability affects your stack