OSV-2025-512 Invalid-free in pdf_decodestream
An invalid-free vulnerability in the PDF decoding stream allows attackers to cause crashes or potentially execute code via malicious PDF files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is OSV-2025-512?
OSV-2025-512 is a memory corruption vulnerability in clamav, published on 3 Jul 2025. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=428754704
Crash type: Invalid-free
Crash state:
pdf_decodestream
pdf_extract_obj
cli_pdf
Which versions are affected by OSV-2025-512?
1 open source package ship an affected version, including clamav.
| Package | Affected | Fixed in |
|---|---|---|
clamav OSS-Fuzz | All versions | None |
How do I fix OSV-2025-512?
No fix has been published for OSV-2025-512 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is OSV-2025-512 being exploited?
There is no known exploitation of OSV-2025-512 in the wild and no public exploit code.