CVE-2021-3735 — Improper Locking in Qemu

CWE-667 — Improper LockingCWE-400 — Uncontrolled Resource Consumption5 documents5 sources
Severity
4.4MEDIUMNVD
EPSS
0.1%
top 67.60%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
QemuDebian LinuxDebian Qemu
Timeline
PublishedAug 26
Latest updateAug 27

Description

A deadlock issue was found in the AHCI controller device of QEMU. It occurs on a software reset (ahci_reset_port) while handling a host-to-device Register FIS (Frame Information Structure) packet from the guest. A privileged user inside the guest could use this flaw to hang the QEMU process on the host, resulting in a denial of service condition. The highest threat from this vulnerability is to system availability.

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:HExploitability: 0.8 | Impact: 3.6

Affected Packages3 packages

▶CVEListV5qemu/qemuNot Known
▶NVDqemu/qemu6.1.0
▶debiandebian/qemu

Also affects: Debian Linux 10.0, 11.0

🔴Vulnerability Details

2
GHSA
GHSA-ch7h-w2mm-gm7m: A deadlock issue was found in the AHCI controller device of QEMU↗2022-08-27
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OSV
CVE-2021-3735: A deadlock issue was found in the AHCI controller device of QEMU↗2022-08-26
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📋Vendor Advisories

2
Red Hat
QEMU: ahci: deadlock issue leads to denial of service↗2021-08-24
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Debian
CVE-2021-3735: qemu - A deadlock issue was found in the AHCI controller device of QEMU. It occurs on a...↗2021
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