CVE-2025-58151: Xen varstored, състезание за ресурс

Описание

Оригинално описание

varstored is a component of the Xapi toolstack handling UEFI Variables for a VM. It has a communication path with OVMF inside the VM involving mapping a buffer prepared by OVMF. Within varstored, there were insufficient compiler barriers, creating TOCTOU issues with data in the shared buffer. The exact vulnerable behaviour depends on the code generated by the compiler. In a build of varstored using default settings, the attacker can control an index used in a jump table.

Засегнати продукти

• Xen varstored: all

Вид слабост

• CWE-367 Състезание за ресурси от тип TOCTOU

История

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2025-58151
• https://nvd.nist.gov/vuln/detail/CVE-2025-58151
• https://xenbits.xen.org/xsa/advisory-478.html
• http://www.openwall.com/lists/oss-security/2026/01/27/2
• http://xenbits.xen.org/xsa/advisory-478.html