TI-2019-14550 Aliases CVE-2019-20175 GHSA-4r96-hw22-hhc7

An issue was discovered in ide_dma_cb() in hw/ide/core.c in QEMU 2.4.0 through 4.2.0.

LOW 39CWE-754Published 2019-12-31 · Updated 2024-08-05

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: None · None · High
Fix status: No fix listed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

An issue was discovered in ide_dma_cb() in hw/ide/core.c in QEMU 2.4.0 through 4.2.0. The guest system can crash the QEMU process in the host system via a special SCSI_IOCTL_SEND_COMMAND. It hits an assertion that implies that the size of successful DMA transfers there must be a multiple of 512 (the size of a sector). NOTE: a member of the QEMU security team disputes the significance of this issue because a "privileged guest user has many ways to cause similar DoS effect, without triggering this assert.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.03355 88th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
—	—	all versions	—	No fix listed	CNA

— Vendor— Affected all versions Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:qemu:qemu::::::::	2.4.0 – 4.2.0	Vulnerable	QEMU

cpe:2.3:a:qemu:qemu:*:*:*:*:*:*:*:* Versions 2.4.0 – 4.2.0 Vulnerable ·QEMU

Remediation

No fixed version listed by the sources yet.

Timeline

2026-10-02 Threatist record created from CVE-2019-20175
2026-10-03 Alias added: GHSA-4r96-hw22-hhc7

References

Exploit 1

https://lists.nongnu.org/archive/html/qemu-devel/2019-07/msg01651.html

Patch 1

https://lists.nongnu.org/archive/html/qemu-devel/2019-11/msg02165.html

Advisory 2

Other 1

https://www.mail-archive.com/qemu-devel%40nongnu.org/msg667396.html

TI-2024-16148 QEMU before 8.2.0 has an integer underflow, and resultant buffer overflow, via a TI… CVSS 3.1HIGH 8.8
TI-2022-02736 Uncontrolled resource consumption in QEMU CVSS 3.1HIGH 7.8
TI-2023-02681 Qemu: 9pfs: improper access control on special files CVSS 3.1HIGH 7.1
TI-2019-09678 The QMP migrate command in QEMU version 4.0.0 and earlier is vulnerable to OS command… CVSS 3.0CRITICAL 9.8
TI-2024-03326 Qemu-kvm: net: assertion failure in update_sctp_checksum() CVSS 3.1MEDIUM 5.5
TI-2023-22631 QEMU through 8.0.0 could trigger a division by zero in scsi_disk_reset in… CVSS 3.1MEDIUM 5.5

See all 418 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences