CVE-2021-4158

medium

Published 2022-11-15 · Modified 2022-05-10

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CVSS v3

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CVSS v4 NEW

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not yet in upstream

VIR risk

5.5

Description

A NULL pointer dereference issue was found in the ACPI code of QEMU. A malicious, privileged user within the guest could use this flaw to crash the QEMU process on the host, resulting in a denial of service condition.

Predictions

Exploit likelihood

20%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

OS impact

AlmaLinux Fixed 2 releases

Version	Status	Fixed in
9	Fixed	`qemu-kvm-device-display-virtio-gpu-gl-7.0.0-13.el9.aarch64.rpm`
8	Fixed	`swtpm-devel-0.7.0-1.20211109gitb79fd91.module_el8.6.0+2880+7d9e3703.x86_64.rpm`

Debian Fixed 5 releases

Version	Status	Fixed in
trixie	Fixed	`1:6.2+dfsg-2`
sid	Fixed	`1:6.2+dfsg-2`
forky	Fixed	`1:6.2+dfsg-2`
bullseye	Fixed	`0`
bookworm	Fixed	`1:6.2+dfsg-2`

Red Hat Fixed 2 releases

Version	Status	Fixed in
9	Fixed	—
8	Fixed	—

Rocky Linux Fixed 2 releases

Version	Status	Fixed in
9	Fixed	—
8	Fixed	—

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.