CVE-2023-2612

shiftfs lock unbalance in Ubuntu-specific kernels

Description

Jean-Baptiste Cayrou discovered that the shiftfs file system in the Ubuntu Linux kernel contained a race condition when handling inode locking in some situations. A local attacker could use this to cause a denial of service (kernel deadlock).

Category

4.4
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.02%
Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com Vendor Advisory ubuntu.com
Affected: Canonical Ltd. ubuntu-linux
Published at:
Updated at:

References

Link Tags
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/kinetic/commit/?id=02b47547824b1cd0d55c6744f91886f04de8947e patch mailing list
https://ubuntu.com/security/CVE-2023-2612 vendor advisory
https://ubuntu.com/security/notices/USN-6122-1 vendor advisory
https://ubuntu.com/security/notices/USN-6123-1 vendor advisory
https://ubuntu.com/security/notices/USN-6124-1 vendor advisory
https://ubuntu.com/security/notices/USN-6127-1 vendor advisory
http://packetstormsecurity.com/files/173087/Kernel-Live-Patch-Security-Notice-LSN-0095-1.html

Frequently Asked Questions

What is the severity of CVE-2023-2612?
CVE-2023-2612 has been scored as a medium severity vulnerability.
How to fix CVE-2023-2612?
To fix CVE-2023-2612, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2023-2612 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2023-2612 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2023-2612?
CVE-2023-2612 affects Canonical Ltd. ubuntu-linux.
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