CVE-2023-53782 dccp: Fix out of bounds access in DCCP error handler
An out-of-bounds access in the Linux kernel DCCP error handler allows remote attackers to cause a denial of service or potentially execute code.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2023-53782?
CVE-2023-53782 is a memory corruption vulnerability in Linux, published on 9 Dec 2025. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
dccp: Fix out of bounds access in DCCP error handler
There was a previous attempt to fix an out-of-bounds access in the DCCP error handlers, but that fix assumed that the error handlers only want to access the first 8 bytes of the DCCP header. Actually, they also look at the DCCP sequence number, which is stored beyond 8 bytes, so an explicit pskb_may_pull() is required.
Which versions are affected by CVE-2023-53782?
How do I fix CVE-2023-53782?
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-2023-53782 being exploited?
There is no known exploitation of CVE-2023-53782 in the wild and no public exploit code.
Sources
Also known as BELL-CVE-2023-53782, DEBIAN-CVE-2023-53782, GHSA-6mgp-6842-9x3v, UBUNTU-CVE-2023-53782.