CVE-2024-58084 firmware: qcom: scm: Fix missing read barrier in qcom_scm_get_tzmem_pool()
A missing read barrier in the Qualcomm SCM driver can cause a null pointer dereference, leading to a kernel crash and denial of service.
- 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-2024-58084?
CVE-2024-58084 is a medium-severity vulnerability in Linux kernel, published on 6 Mar 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:
firmware: qcom: scm: Fix missing read barrier in qcom_scm_get_tzmem_pool()
Commit 2e4955167ec5 ("firmware: qcom: scm: Fix __scm and waitq completion variable initialization") introduced a write barrier in probe function to store global '__scm' variable. We all known barriers are paired (see memory-barriers.txt: "Note that write barriers should normally be paired with read or address-dependency barriers"), therefore accessing it from concurrent contexts requires read barrier. Previous commit added such barrier in qcom_scm_is_available(), so let's use that directly.
Lack of this read barrier can result in fetching stale '__scm' variable value, NULL, and dereferencing it.
Note that barrier in qcom_scm_is_available() satisfies here the control dependency.
Weakness: CWE-476
Which versions are affected by CVE-2024-58084?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2024-58084?
Apply the vendor's patch.
Is CVE-2024-58084 being exploited?
There is no known exploitation of CVE-2024-58084 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2024-58084, DEBIAN-CVE-2024-58084, GHSA-q37x-r635-xf49, UBUNTU-CVE-2024-58084.