What’s Vulnerable › Vulnerabilities

CVE-2026-62433: correct buffer checks for DM_OP hypercalls

• Severity: high (CVSS 7.3 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: 2026-07-28 · updated 2026-07-28
• Weakness: CWE-665

Description

Parts of the DM_OP handling code assumes the caller has provided the required number of buffers for the given operation without any checking being done. As a result, certain operations might access stack rubble as structures are possibly uninitialized.

References

• https://xenbits.xenproject.org/xsa/advisory-506.html
• http://www.openwall.com/lists/oss-security/2026/07/28/22
• http://xenbits.xen.org/xsa/advisory-506.html

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