CVE-2023-53729 soc: qcom: qmi_encdec: Restrict string length in decode
An out-of-bounds write in the Qualcomm QMI decoder allows attackers to cause memory corruption, potentially leading to system crashes or code execution.
- 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-2023-53729?
CVE-2023-53729 is a high-severity memory corruption vulnerability in Linux, published on 22 Oct 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:
soc: qcom: qmi_encdec: Restrict string length in decode
The QMI TLV value for strings in a lot of qmi element info structures account for null terminated strings with MAX_LEN + 1. If a string is actually MAX_LEN + 1 length, this will cause an out of bounds access when the NULL character is appended in decoding.
Which versions are affected by CVE-2023-53729?
How do I fix CVE-2023-53729?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2023-53729 being exploited?
There is no known exploitation of CVE-2023-53729 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2023-53729, DEBIAN-CVE-2023-53729, GHSA-x9cj-hfg7-wvpw, UBUNTU-CVE-2023-53729.