PT-2021-8273 · Qemu+3 · Qemu+3

Luis Henriques · Published 2021-03-17 · Updated 2024-12-06 · CVE-2021-46956

Positive Technologies (AI Summary)

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The issue is related to a memory leak in the virtio fs probe() function when the same tag is passed twice to qemu, causing kmemleak to report a memory leak in virtiofs. The error is indicated by a log message stating "virtiofs: probe of virtio5 failed with error -17". The vulnerability may allow an attacker to cause a denial of service.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Memory Leak

Weakness Enumeration

CWE-401

Related Identifiers

BDU:2025-00823

CVE-2021-46956

OPENSUSE-SU-2024_1489-1

SUSE-SU-2024:1465-1

SUSE-SU-2024:1489-1

Affected Products

Astra Linux

Linux Kernel

Suse

Qemu

References · 342

• https://osv.dev/vulnerability/SUSE-SU-2024:1489-1 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-46956 · Vendor Advisory
• https://git.kernel.org/stable/c/5116e79fc6e6725b8acdad8b7e928a83ab7b47e6 · Patch
• https://git.kernel.org/stable/c/310efc95c72c13faf855c692d19cd4d054d827c8 · Patch
• https://bdu.fstec.ru/vul/2025-00823 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-46956 · Vendor Advisory
• https://wiki.astralinux.ru/astra-linux-se81-bulletin-20241206SE81 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-46956 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-46956 · Security Note
• https://git.kernel.org/stable/c/c79c5e0178922a9e092ec8fed026750f39dcaef4 · Patch
• https://git.kernel.org/stable/c/9b9d60c0eb8ada99cce2a9ab5c15dffc523b01ae · Patch
• https://ubuntu.com/security/CVE-2021-46956 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2024:1465-1 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-46956 · Vendor Advisory
• https://git.kernel.org/stable/c/d19555ff225d0896a33246a49279e6d578095f15 · Patch