CVE-2022-1263

Name: CVE-2022-1263
Creator: NVD / NIST
Published: 2022-08-31T16:15:09.29+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.42%

Last modified Jun 17, 2026

CVE-2022-1263 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. A NULL pointer dereference issue was found in KVM when releasing a vCPU with dirty ring support enabled. This flaw allows an unprivileged local attacker on the host to issue specific ioctl calls, causing a kernel oops condition that results in a denial of service.. EPSS estimates a 0.42% chance of exploitation in the next 30 days.

Description

A NULL pointer dereference issue was found in KVM when releasing a vCPU with dirty ring support enabled. This flaw allows an unprivileged local attacker on the host to issue specific ioctl calls, causing a kernel oops condition that results in a denial of service.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.42%

33.6th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions	Update
Linux	Linux Kernel	< 5.18	—
Linux	Linux Kernel	5.18	Rc1
Redhat	Enterprise Linux	8.0	—
Redhat	Enterprise Linux	9.0	—

References

https://access.redhat.com/security/cve/CVE-2022-1263Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2072698Issue Tracking, Patch, Third Party Advisory
https://github.com/torvalds/linux/commit/5593473a1e6c743764b08e3b6071cb43b5cfa6c4Patch, Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/04/07/1Exploit, Mailing List, Third Party Advisory
https://access.redhat.com/security/cve/CVE-2022-1263Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2072698Issue Tracking, Patch, Third Party Advisory
https://github.com/torvalds/linux/commit/5593473a1e6c743764b08e3b6071cb43b5cfa6c4Patch, Third Party Advisory
https://www.openwall.com/lists/oss-security/2022/04/07/1Exploit, Mailing List, Third Party Advisory

Timeline

Published: Aug 31, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-1263?

How severe is CVE-2022-1263?

CVE-2022-1263 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.42% probability of exploitation in the next 30 days.

How do I fix CVE-2022-1263?

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-2022-1263?

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

Scan your code now

Source: NVD / NIST