CVE-2018-20191

hw/rdma/vmw/pvrdma_main.c in QEMU does not implement a read operation (such as uar_read by...

7.5 HighFix available

hw/rdma/vmw/pvrdma_main.c in QEMU does not implement a read operation (such as uar_read by analogy to uar_write), which allows attackers to cause a denial of service (NULL pointer dereference).

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: High

Exploit likelihood

3.72%Up 1.9 points since Apr 14, 2021

What each source reports

NVD Score used 7.5

hw/rdma/vmw/pvrdma_main.c in QEMU does not implement a read operation (such as uar_read by analogy to uar_write), which allows attackers to cause a denial of service (NULL pointer dereference).

Record: CVE-2018-20191
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS 2.0: 5.0 MediumAV:N/AC:L/Au:N/C:N/I:N/A:P
Weakness: CWE-476
Updated: 2026-11-02

CVE List No score

hw/rdma/vmw/pvrdma_main.c in QEMU does not implement a read operation (such as uar_read by analogy to uar_write), which allows attackers to cause a denial of service (NULL pointer dereference).

Record: CVE-2018-20191
Updated: 2026-11-02

EUVDEUVD-2018-12758 No score

hw/rdma/vmw/pvrdma_main.c in QEMU does not implement a read operation (such as uar_read by analogy to uar_write), which allows attackers to cause a denial of service (NULL pointer dereference).

Record: EUVD-2018-12758
Updated: 2026-11-03

GitHub AdvisoriesGHSA-h5wg-wcrq-7mp8 7.5

hw/rdma/vmw/pvrdma_main.c in QEMU does not implement a read operation (such as uar_read by...

hw/rdma/vmw/pvrdma_main.c in QEMU does not implement a read operation (such as uar_read by analogy to uar_write), which allows attackers to cause a denial of service (NULL pointer dereference).

Record: GHSA-h5wg-wcrq-7mp8
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness: CWE-476
Updated: 2026-11-02

OSVBELL-CVE-2018-20191 7.5

CVE-2018-20191 does not affect BellSoft software

Record: BELL-CVE-2018-20191
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSV 7.5

hw/rdma/vmw/pvrdma_main.c in QEMU does not implement a read operation (such as uar_read by analogy to uar_write), which allows attackers to cause a denial of service (NULL pointer dereference).

Record: CVE-2018-20191
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVDEBIAN-CVE-2018-20191 7.5

hw/rdma/vmw/pvrdma_main.c in QEMU does not implement a read operation (such as uar_read by analogy to uar_write), which allows attackers to cause a denial of service (NULL pointer dereference).

Record: DEBIAN-CVE-2018-20191
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Updated: 2026-11-02

OSVopenSUSE-SU-2024:11287-1 No score

qemu-6.1.0-32.1 on GA media

These are all security issues fixed in the qemu-6.1.0-32.1 package on the GA media of openSUSE Tumbleweed.

Record: openSUSE-SU-2024:11287-1
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`qemu` Debian:12	before 1:4.1-1	1:4.1-1
`qemu` Debian:13	before 1:4.1-1	1:4.1-1
`qemu` Debian:14	before 1:4.1-1	1:4.1-1
`qemu` openSUSE:Tumbleweed	before 6.1.0-32.1	6.1.0-32.1

History

History
Recorded	Changed	Sources
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2018-20191 is a high vulnerability (CVSS 7.5) in Qemu, published December 20, 2018. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.72%, the 89th percentile. Fixed in qemu 1:4.1-1.

References

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