GHSA-5pmw-9j92-3c4c
OpenH264 Rust API Openh264 Decoding Functions Heap Overflow Vulnerability
OpenH264 recently reported a heap overflow that was fixed in upstream 63db555 and integrated into our 0.6.6 release. For users relying on Cisco's pre-compiled DLL, we also published 0.8.0, which is compatible with their latest fixed DLL version 2.6.0.
In other words:
- if you rely on our
sourcefeature only, >=0.6.6 should be safe, - if you rely on
libloading, you must upgrade to 0.8.0 and use their latest DLL >=2.6.0.
Users handling untrusted video files should update immediately.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- Active
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
What each source reports
GitHub Advisories Score used
OpenH264 Rust API Openh264 Decoding Functions Heap Overflow Vulnerability
OpenH264 recently reported a heap overflow that was fixed in upstream 63db555 and integrated into our 0.6.6 release. For users relying on Cisco's pre-compiled DLL, we also published 0.8.0, which is compatible with their latest fixed DLL version 2.6.0.
In other words:
- if you rely on our
sourcefeature only, >=0.6.6 should be safe, - if you rely on
libloading, you must upgrade to 0.8.0 and use their latest DLL >=2.6.0.
Users handling untrusted video files should update immediately.
- Record
GHSA-5pmw-9j92-3c4c- CVSS 4.0
- 8.6 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - Weakness
- CWE-122, CWE-1395
- Updated
- 2026-11-02
OSV
OpenH264 Rust API Openh264 Decoding Functions Heap Overflow Vulnerability
OpenH264 recently reported a heap overflow that was fixed in upstream 63db555 and integrated into our 0.6.6 release. For users relying on Cisco's pre-compiled DLL, we also published 0.8.0, which is compatible with their latest fixed DLL version 2.6.0.
In other words:
- if you rely on our
sourcefeature only, >=0.6.6 should be safe, - if you rely on
libloading, you must upgrade to 0.8.0 and use their latest DLL >=2.6.0.
Users handling untrusted video files should update immediately.
- Record
GHSA-5pmw-9j92-3c4c- CVSS 4.0
- 8.6 High
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - Weakness
- CWE-122, CWE-1395
- Updated
- 2026-11-02
OSVRUSTSEC-2025-0008No score
Openh264 Decoding Functions Heap Overflow Vulnerability
OpenH264 recently reported a heap overflow that was fixed in upstream 63db555 and integrated into our 0.6.6 release. For users relying on Cisco's pre-compiled DLL, we also published 0.8.0, which is compatible with their latest fixed DLL version 2.6.0.
In other words:
- if you rely on our
sourcefeature only, >=0.6.6 should be safe, - if you rely on
libloading, you must upgrade to 0.8.0 and use their latest DLL >=2.6.0.
Users handling untrusted video files should update immediately.
- Record
RUSTSEC-2025-0008- Updated
- 2026-11-02
Affected packages
| Package | Affected | Fixed |
|---|---|---|
openh264-sys2crates.io | before 0.8.0 | 0.8.0 |
openh264-sys2crates.io | 0.0.0-0 up to 0.8.0 | 0.8.0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| first indexed | GitHub Advisories, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
GHSA-5pmw-9j92-3c4c is a high vulnerability (CVSS 8.6) in openh264-sys2, published February 24, 2025. No source lists public exploit code. Fixed in openh264-sys2 0.8.0.
References
nvd.nist.gov/vuln/detail/CVE-2025-27091
github.com/cisco/openh264/pull/3818
rustsec.org/advisories/RUSTSEC-2025-0008.html
crates.io/crates/openh264-sys2