CVE-2025-58151

Katalog CVE

CVSS 9.4 · Critical EPSS 0,14%

Kerentanan Time-of-check Time-of-use (TOCTOU) Race Condition. Skor CVSS 4.0 9.4 (Critical) menurut xen.org.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

9 Juli 2026

Terakhir diubah

29 September 2026

Status NVD

Deferred

CVSS 4.0

9.4 (Critical), sumber xen.org
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition

EPSS (30 hari)

0,14% peluang dieksploitasi; lebih tinggi dari 2,7% CVE lain

Produk dan versi terdampak

NVD belum mencantumkan data produk (CPE) untuk CVE ini. Produk yang terdampak biasanya disebut di deskripsi dan di advisory vendor pada daftar referensi.

Referensi dan perbaikan

• 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