CVE-2020-25742

Name: CVE-2020-25742
Creator: NVD / NIST
Published: 2020-10-06T15:15:15.007+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

LOWCVSS 3.2/10EPSS 0.46%

Last modified Jun 17, 2026

CVE-2020-25742 is a low-severity vulnerability rated 3.2/10 on the CVSS scale. pci_change_irq_level in hw/pci/pci.c in QEMU before 5.1.1 has a NULL pointer dereference because pci_get_bus() might not return a valid pointer.. EPSS estimates a 0.46% chance of exploitation in the next 30 days.

Description

pci_change_irq_level in hw/pci/pci.c in QEMU before 5.1.1 has a NULL pointer dereference because pci_get_bus() might not return a valid pointer.

Metrics

CVSS 3.1

3.2/10

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

EPSS Probability

0.46%

36.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-476

Affected Software

Vendor	Product	Versions
Qemu	Qemu	< 5.1.1

References

http://www.openwall.com/lists/oss-security/2020/09/29/1Mailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1883178Issue Tracking, Patch, Third Party Advisory
https://lists.nongnu.org/archive/html/qemu-devel/2020-09/msg05294.htmlMailing List, Patch, Third Party Advisory
https://ruhr-uni-bochum.sciebo.de/s/NNWP2GfwzYKeKwE?path=%2Flsi_nullptr1Third Party Advisory
http://www.openwall.com/lists/oss-security/2020/09/29/1Mailing List, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=1883178Issue Tracking, Patch, Third Party Advisory
https://lists.nongnu.org/archive/html/qemu-devel/2020-09/msg05294.htmlMailing List, Patch, Third Party Advisory
https://ruhr-uni-bochum.sciebo.de/s/NNWP2GfwzYKeKwE?path=%2Flsi_nullptr1Third Party Advisory

Timeline

Published: Oct 6, 2020
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2020-25742?

pci_change_irq_level in hw/pci/pci.c in QEMU before 5.1.1 has a NULL pointer dereference because pci_get_bus() might not return a valid pointer.

How severe is CVE-2020-25742?

CVE-2020-25742 has a CVSS score of 3.2/10 (LOW severity). The EPSS model estimates a 0.46% probability of exploitation in the next 30 days.

How do I fix CVE-2020-25742?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2020-25742?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST