CVE-2016-1922

medium

Published 2016-12-29 · Modified 2026-05-06

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CVSS v3

5.5

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v4 NEW

—

not yet in upstream

VIR risk

5.5

Description

QEMU (aka Quick Emulator) built with the TPR optimization for 32-bit Windows guests support is vulnerable to a null pointer dereference flaw. It occurs while doing I/O port write operations via hmp interface. In that, 'current_cpu' remains null, which leads to the null pointer dereference. A user or process could use this flaw to crash the QEMU instance, resulting in DoS issue.

Predictions

Exploit likelihood

55%

Patch ETA

—

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

OS	Version	Status	Fixed in
sles		affected
debian	7.0	affected
debian	8.0	affected
debian	bookworm	fixed	`1:2.5+dfsg-4`
debian	bullseye	fixed	`1:2.5+dfsg-4`
debian	forky	fixed	`1:2.5+dfsg-4`
debian	sid	fixed	`1:2.5+dfsg-4`
debian	trixie	fixed	`1:2.5+dfsg-4`

Application impact

Vendor	Product	Versions	Fixed
qemu	qemu	`{"endIncluding":"2.5.1.1"}`

References

CWEs

CWE-476

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

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