OSV-2025-173 UNKNOWN READ in chunk_obj_alloc
A memory corruption vulnerability in a PDF parsing library allows attackers to cause a denial of service via crafted files.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is OSV-2025-173?
OSV-2025-173 is a memory corruption vulnerability in ghostscript, published on 28 Feb 2025. An attacker can exploit it over the internet without logging in, 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=399390078
Crash type: UNKNOWN READ
Crash state:
chunk_obj_alloc
pdfi_read_cff_dict
pdfi_read_cff_dict
Which versions are affected by OSV-2025-173?
1 open source package ship an affected version, including ghostscript.
| Package | Affected | Fixed in |
|---|---|---|
ghostscript OSS-Fuzz | All versions | None |
How do I fix OSV-2025-173?
No fix has been published for OSV-2025-173 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-2025-173 being exploited?
There is no known exploitation of OSV-2025-173 in the wild and no public exploit code.