CVE-2025-32743 Memory corruption in ConnMan
Attackers can crash ConnMan or execute arbitrary code via malformed DNS responses with truncated bits, affecting Linux network management.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2025-32743?
CVE-2025-32743 is a critical memory corruption vulnerability in ConnMan, published on 10 Apr 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In ConnMan through 1.44, the lookup string in ns_resolv in dnsproxy.c can be NULL or an empty string when the TC (Truncated) bit is set in a DNS response. This allows attackers to cause a denial of service (application crash) or possibly execute arbitrary code, because those lookup values lead to incorrect length calculations and incorrect memcpy operations.
Weakness: CWE-392
Which versions are affected by CVE-2025-32743?
How do I fix CVE-2025-32743?
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-2025-32743 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-32743 exists.
Sources
Also known as DEBIAN-CVE-2025-32743, GHSA-r8hx-vf7j-v5q3, UBUNTU-CVE-2025-32743.