What is CVE-2021-26955?

CVE-2021-26955 is a critical-severity vulnerability in Xcb_project Xcb, classified under CWE-252. CVSS score: 9.8/10. Published 2021-02-09.

How severe is CVE-2021-26955?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Xcb_project Xcb

CVE-2021-26955

An issue was discovered in the xcb crate through 2021-02-04 for Rust. It has a soundness violation because xcb::xproto::GetAtomNameReply::name() calls std::str::from_utf8_unchecked() on unvalidated bytes from an X server.

EPSS: 0.017 (74.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Xcb_project Xcb
N/a — versions n/a

Weakness classification (CWE)

CWE-252

References

cve@mitre.org (Exploit, x_refsource_MISC, Vendor Advisory)

Frequently asked questions

What is CVE-2021-26955?: CVE-2021-26955 is a critical-severity vulnerability in Xcb_project Xcb, classified under CWE-252. CVSS score: 9.8/10. Published 2021-02-09.
How severe is CVE-2021-26955?: Critical severity. CVSS v3 base score is 9.8 out of 10.