CVE-2024-50210 posix-clock: posix-clock: Fix unbalanced locking in pc_clock_settime()

What is CVE-2024-50210?

CVE-2024-50210 is a medium-severity vulnerability in Linux kernel, published on 8 Nov 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

posix-clock: posix-clock: Fix unbalanced locking in pc_clock_settime()

If get_clock_desc() succeeds, it calls fget() for the clockid's fd, and get the clk->rwsem read lock, so the error path should release the lock to make the lock balance and fput the clockid's fd to make the refcount balance and release the fd related resource.

However the below commit left the error path locked behind resulting in unbalanced locking. Check timespec64_valid_strict() before get_clock_desc() to fix it, because the "ts" is not changed after that.

[[email protected]: fixed commit message typo]

Weakness: CWE-667

Which versions are affected by CVE-2024-50210?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-50210?

Apply the vendor's patch.

Is CVE-2024-50210 being exploited?

There is no known exploitation of CVE-2024-50210 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

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

Also known as BELL-CVE-2024-50210, DEBIAN-CVE-2024-50210, GHSA-975c-w82q-mxhv, UBUNTU-CVE-2024-50210.