What’s Vulnerable › Vulnerabilities

CVE-2026-62431: Viridian STIMER division by zero

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-28 · updated 2026-07-28
• Weakness: CWE-369

Description

The logic to handle periodic Viridian STIMERs performs a division with an unchecked user-controlled divisor value, that can be set to zero to cause a #DE fault.

References

• https://xenbits.xenproject.org/xsa/advisory-504.html
• http://www.openwall.com/lists/oss-security/2026/07/28/20
• http://xenbits.xen.org/xsa/advisory-504.html

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