CVE-2025-37937 objtool, media: dib8000: Prevent divide-by-zero in dib8000_set_dds()
A divide-by-zero error in the Linux kernel's dib8000 driver can cause a system crash, requiring a kernel patch to prevent 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-2025-37937?
CVE-2025-37937 is a medium-severity denial of service vulnerability in Debian Debian Linux, published on 20 May 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:
objtool, media: dib8000: Prevent divide-by-zero in dib8000_set_dds()
If dib8000_set_dds()'s call to dib8000_read32() returns zero, the result is a divide-by-zero. Prevent that from happening.
Fixes the following warning with an UBSAN kernel:
drivers/media/dvb-frontends/dib8000.o: warning: objtool: dib8000_tune() falls through to next function dib8096p_cfg_DibRx()
Weakness: CWE-369
Which versions are affected by CVE-2025-37937?
It affects 2 products.
Products include Debian Debian Linux, Linux kernel.
How do I fix CVE-2025-37937?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2025-37937 being exploited?
There is no known exploitation of CVE-2025-37937 in the wild and no public exploit code.
Other vulnerabilities in Debian Debian Linux
Sources
Also known as BELL-CVE-2025-37937, DEBIAN-CVE-2025-37937, GHSA-fm29-2487-rchf, ROOT-OS-DEBIAN-11-CVE-2025-37937, ROOT-OS-UBUNTU-2404-CVE-2025-37937, UBUNTU-CVE-2025-37937.