CVE-2023-2612 shiftfs lock unbalance in Ubuntu-specific kernels

What is CVE-2023-2612?

CVE-2023-2612 is a medium-severity vulnerability in Canonical Ubuntu Linux, published on 30 May 2023. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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).

Weakness: CWE-667

Which versions are affected by CVE-2023-2612?

It affects 1 product.

Products include Canonical Ubuntu Linux.

How do I fix CVE-2023-2612?

Apply the vendor's patch.

Is CVE-2023-2612 being exploited?

There is no known exploitation of CVE-2023-2612 in the wild and no public exploit code.

Other vulnerabilities in Canonical Ubuntu Linux

• CVE-2020-11651 SaltStack Salt Authentication Bypass Exploited Critical 9.8
• CVE-2020-7247 OpenSMTPD Remote Code Execution Exploited Critical 9.8
• CVE-2019-16928 Exim Out-of-bounds Write Exploited Critical 9.8
• CVE-2018-6789 Exim Buffer Overflow Exploited Critical 9.8
• CVE-2015-2590 Oracle Java SE and Java SE Embedded Remote Code Execution Exploited Critical 9.8

All Canonical Ubuntu Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-r34w-xrj9-cpvr, UBUNTU-CVE-2023-2612.