Vulnerability Description
Closing of an event channel in the Linux kernel can result in a deadlock. This happens when the close is being performed in parallel to an unrelated Xen console action and the handling of a Xen console interrupt in an unprivileged guest. The closing of an event channel is e.g. triggered by removal of a paravirtual device on the other side. As this action will cause console messages to be issued on the other side quite often, the chance of triggering the deadlock is not neglectable. Note that 32-bit Arm-guests are not affected, as the 32-bit Linux kernel on Arm doesn't use queued-RW-locks, which are required to trigger the issue (on Arm32 a waiting writer doesn't block further readers to get the lock).
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | < 5.10 |
| Xen | Xen | - |
Related Weaknesses (CWE)
References
- https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
- https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html
- https://xenbits.xenproject.org/xsa/advisory-441.htmlPatchVendor Advisory
- http://xenbits.xen.org/xsa/advisory-441.html
- https://lists.debian.org/debian-lts-announce/2024/01/msg00004.html
- https://lists.debian.org/debian-lts-announce/2024/01/msg00005.html
- https://xenbits.xenproject.org/xsa/advisory-441.htmlPatchVendor Advisory
FAQ
What is CVE-2023-34324?
CVE-2023-34324 is a vulnerability with a CVSS score of 4.9 (MEDIUM). Closing of an event channel in the Linux kernel can result in a deadlock. This happens when the close is being performed in parallel to an unrelated Xen console action and the handling of a Xen consol...
How severe is CVE-2023-34324?
CVE-2023-34324 has been rated MEDIUM with a CVSS base score of 4.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-34324?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel, Xen Xen.