CVE-2022-49423 rtla: Avoid record NULL pointer dereference
A NULL pointer dereference in the Linux kernel's rtla tool can cause a denial of service when specific tracing tools are used.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2022-49423?
CVE-2022-49423 is a medium-severity vulnerability in Linux kernel, published on 26 Feb 2025. 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:
rtla: Avoid record NULL pointer dereference
Fix the following null/deref_null.cocci errors: ./tools/tracing/rtla/src/osnoise_hist.c:870:31-36: ERROR: record is NULL but dereferenced. ./tools/tracing/rtla/src/osnoise_top.c:650:31-36: ERROR: record is NULL but dereferenced. ./tools/tracing/rtla/src/timerlat_hist.c:905:31-36: ERROR: record is NULL but dereferenced. ./tools/tracing/rtla/src/timerlat_top.c:700:31-36: ERROR: record is NULL but dereferenced.
"record" is NULL before calling osnoise_init_trace_tool. Add a tag "out_free" to avoid dereferring a NULL pointer.
Weakness: CWE-476
Which versions are affected by CVE-2022-49423?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2022-49423?
Apply the vendor's patch.
Is CVE-2022-49423 being exploited?
There is no known exploitation of CVE-2022-49423 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as DEBIAN-CVE-2022-49423, GHSA-hqwq-59rq-89xh, UBUNTU-CVE-2022-49423.