CVE-2022-2153
MEDIUM severity · CVSS 5.5 · CWE-476
5.5CVSS MEDIUM
Summary
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.
Impact & exploitability
Attack vectorLocal
Attack complexityLow
Privileges requiredLow
User interactionNone
Confidentiality impactNone
Integrity impactNone
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products we track (4)
Recommendation
Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.
Official patch: https://bugzilla.redhat.com/show_bug.cgi?id=2069736 ↗
Additional information
- NVD record
- https://bugzilla.redhat.com/show_bug.cgi?id=2069736Patch
- https://github.com/torvalds/linux/commit/00b5f37189d24ac3ed46cb7f11742094778c46cePatch
- https://github.com/torvalds/linux/commit/7ec37d1cbe17d8189d9562178d8b29167fe1c31aPatch
- https://github.com/torvalds/linux/commit/b1e34d325397a33d97d845e312d7cf2a8b646b44Patch
- https://www.openwall.com/lists/oss-security/2022/06/22/1Patch
- https://lists.debian.org/debian-lts-announce/2022/10/msg00000.htmlAdvisory
- https://lists.debian.org/debian-lts-announce/2022/11/msg00001.htmlAdvisory