Cyber Resilience

CVE-2021-26958

HighPublic PoC

Published: 09 February 2021

Published
09 February 2021
Modified
21 November 2024
KEV Added
—
Patch
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CVSS Score v3.1 8.8 CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score 0.0057 69.0th percentile
Risk Priority 18 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2021-26958 is a high-severity Unchecked Return Value (CWE-252) vulnerability in Xcb Project Xcb. Its CVSS base score is 8.8 (High).

Operationally, ranked in the top 31.0% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

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.

CWE(s)
CWE-252

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

xcb project
xcb
≤ 2021-02-04

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References