CVE-2021-20181

Katalog CVE

CVSS 7.5 · High EPSS 0,33%

Kerentanan Time-of-check Time-of-use (TOCTOU) Race Condition pada qemu, debian linux. Skor CVSS 3.1 7.5 (High) menurut NVD.

Deskripsi (NVD)

A race condition flaw was found in the 9pfs server implementation of QEMU up to and including 5.2.0. This flaw allows a malicious 9p client to cause a use-after-free error, potentially escalating their privileges on the system. The highest threat from this vulnerability is to confidentiality, integrity as well as system availability.

Rincian

Terbit di NVD

13 Mei 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

7.5 (High), sumber NVD
CVSS:3.1/AV:L/AC:H/PR:H/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
CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

EPSS (30 hari)

0,33% peluang dieksploitasi; lebih tinggi dari 24,6% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://bugzilla.redhat.com/show_bug.cgi?id=1927007 issue tracking · patch · advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2021/02/msg00024.html mailing list · advisory pihak ketiga
• https://lists.debian.org/debian-lts-announce/2022/09/msg00008.html mailing list · advisory pihak ketiga
• https://security.netapp.com/advisory/ntap-20210720-0009/ advisory pihak ketiga
• https://www.zerodayinitiative.com/advisories/ZDI-21-159/ advisory pihak ketiga · vdb entry