What’s Vulnerable › Vulnerabilities

CVE-2021-31523

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-04-21 · updated 2026-06-17
• Weakness: CWE-269

Description

The Debian xscreensaver 5.42+dfsg1-1 package for XScreenSaver has cap_net_raw enabled for the /usr/libexec/xscreensaver/sonar file, which allows local users to gain privileges because this is arguably incompatible with the design of the Mesa 3D Graphics library dependency.

Affected products

• Xscreensaver Project Xscreensaver: 5.42+dfsg1-1

References

• http://www.openwall.com/lists/oss-security/2021/04/21/3
• https://www.openwall.com/lists/oss-security/2021/04/17/1
• http://www.openwall.com/lists/oss-security/2021/04/21/3
• https://www.openwall.com/lists/oss-security/2021/04/17/1

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