CVE-2026-23554

Katalog CVE

CVSS 7.8 · High EPSS 0,13%

Kerentanan Time-of-check Time-of-use (TOCTOU) Race Condition pada xen. Skor CVSS 3.1 7.8 (High) menurut CISA ADP.

Deskripsi (NVD)

The Intel EPT paging code uses an optimization to defer flushing of any cached EPT state until the p2m lock is dropped, so that multiple modifications done under the same locked region only issue a single flush. Freeing of paging structures however is not deferred until the flushing is done, and can result in freed pages transiently being present in cached state. Such stale entries can point to memory ranges not owned by the guest, thus allowing access to unintended memory regions.

Rincian

Terbit di NVD

23 Maret 2026

Terakhir diubah

17 Juni 2026

Status NVD

Analyzed

CVSS 3.1

7.8 (High), sumber CISA ADP
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H · uraikan di kalkulator

Jenis kelemahan (CWE)

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

EPSS (30 hari)

0,13% peluang dieksploitasi; lebih tinggi dari 2,1% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://xenbits.xenproject.org/xsa/advisory-480.html patch · advisory vendor
• http://xenbits.xen.org/xsa/advisory-480.html patch · advisory vendor
• http://www.openwall.com/lists/oss-security/2026/03/17/6 mailing list · patch · advisory pihak ketiga