CVE-2022-2153: Null Pointer Dereference
First published: Tue Mar 29 2022(Updated: )
A flaw was found in the Linux kernel’s KVM when attempting to set a SynIC IRQ. This issue makes it possible for a misbehaving VMM to write to SYNIC/STIMER MSRs, causing a NULL pointer dereference. 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.
Credit: secalert@redhat.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <5.18 | 5.18 |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.123-1 6.1.128-1 6.12.12-1 6.12.15-1 | |
| Linux Kernel | <5.18 | |
| Fedora | =36 | |
| Red Hat Enterprise Linux | =6.0 | |
| Red Hat Enterprise Linux | =7.0 | |
| Red Hat Enterprise Linux | =8.0 | |
| Red Hat Enterprise Linux | =9.0 | |
| Debian | =10.0 |
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Reference Links
- https://bugzilla.redhat.com/show_bug.cgi?id=2069736
- https://github.com/torvalds/linux/commit/00b5f37189d24ac3ed46cb7f11742094778c46ce
- https://github.com/torvalds/linux/commit/7ec37d1cbe17d8189d9562178d8b29167fe1c31a
- https://github.com/torvalds/linux/commit/b1e34d325397a33d97d845e312d7cf2a8b646b44
- https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html
- https://lists.debian.org/debian-lts-announce/2022/11/msg00001.html
- https://www.openwall.com/lists/oss-security/2022/06/22/1
- https://launchpad.net/bugs/cve/CVE-2022-2153
- https://patchew.org/linux/20220325132140.25650-1-vkuznets@redhat.com/
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2099734
- https://access.redhat.com/errata/RHSA-2022:7683
- https://access.redhat.com/errata/RHSA-2022:7444
- https://access.redhat.com/errata/RHSA-2022:8267
- https://access.redhat.com/errata/RHSA-2022:7933
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-2153
- https://nvd.nist.gov/vuln/detail/CVE-2022-2153
- https://security-tracker.debian.org/tracker/CVE-2022-2153
- https://ubuntu.com/security/CVE-2022-2153
- https://git.kernel.org/linus/7ec37d1cbe17d8189d9562178d8b29167fe1c31a
- https://git.kernel.org/linus/00b5f37189d24ac3ed46cb7f11742094778c46ce
- https://git.kernel.org/linus/b1e34d325397a33d97d845e312d7cf2a8b646b44
Frequently Asked Questions
What is the severity of CVE-2022-2153?
CVE-2022-2153 has been assessed as medium severity due to the potential for a NULL pointer dereference by an unprivileged local attacker.
How do I fix CVE-2022-2153?
To fix CVE-2022-2153, upgrade to Linux kernel version 5.18 or apply available patches provided by your distribution.
Which Linux distributions are affected by CVE-2022-2153?
CVE-2022-2153 affects various Linux distributions including Red Hat Enterprise Linux, Fedora, and Debian Linux versions prior to their respective patches.
What can exploit CVE-2022-2153?
An unprivileged local attacker on the host can exploit CVE-2022-2153 by issuing specific ioctl calls to trigger the vulnerability.
What does CVE-2022-2153 impact?
CVE-2022-2153 impacts the Linux kernel's KVM functionality, particularly when handling SynIC IRQ settings.
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