OSV-2025-827 Global-buffer-overflow in void jxl::N_SSE4::WriteToOutputStage::StoreUnsignedRow<unsigned char>
A global buffer overflow in the JPEG XL library allows attackers to cause crashes or potentially execute code via malicious images.
- 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-2025-827?
OSV-2025-827 is a memory corruption vulnerability in libjxl, published on 10 Oct 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=450328034
Crash type: Global-buffer-overflow READ 16
Crash state:
void jxl::N_SSE4::WriteToOutputStage::StoreUnsignedRow<unsigned char>
jxl::N_SSE4::WriteToOutputStage::OutputBuffers
jxl::N_SSE4::WriteToOutputStage::ProcessRow
Which versions are affected by OSV-2025-827?
1 open source package ship an affected version, including libjxl.
| Package | Affected | Fixed in |
|---|---|---|
libjxl OSS-Fuzz | All versions | None |
How do I fix OSV-2025-827?
No fix has been published for OSV-2025-827 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-2025-827 being exploited?
There is no known exploitation of OSV-2025-827 in the wild and no public exploit code.