CVE-2025-29476 Memory corruption in n/a
A buffer overflow in the C-Blosc2 library allows attackers to execute arbitrary code or cause denial of service via crafted compressed data.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2025-29476?
CVE-2025-29476 is a medium-severity memory corruption vulnerability in n/a, published on 4 Apr 2025. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Official description
Buffer Overflow vulnerability in compress_chunk_fuzzer with oss-fuzz on commit 16450518afddcb3139de627157208e49bfef6987 in c-blosc2 v.2.17.0 and before.
Weakness: CWE-120
Which versions are affected by CVE-2025-29476?
How do I fix CVE-2025-29476?
Upgrade to a fixed version.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2025-29476 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2025-29476 exists.
Sources
Also known as DEBIAN-CVE-2025-29476, GHSA-p53h-9vwh-rvvp, UBUNTU-CVE-2025-29476.