OSV-2022-327 Stack-use-after-return in QSemaphore::release
A stack-use-after-return vulnerability in Qt's QSemaphore allows attackers to potentially execute arbitrary code or cause a denial of service via crafted input.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Not stated
- Victim action needed
- Not needed
- Fix
- None listed
What is OSV-2022-327?
OSV-2022-327 is an use after free vulnerability in qt, published on 10 Apr 2022.
Official description
OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=46525
The issue already existed before oss-fuzz could reproduce it. oss-fuzz found it after qdrawhelper routines were made multithreaded. There might be ways to trigger the issue before that.
Crash type: Stack-use-after-return WRITE 8
Crash state:
QSemaphore::release
std::__1::__function::__func<void handleSpans<BlendSrcGeneric>
FunctionRunnable::run
Which versions are affected by OSV-2022-327?
1 open source package ship an affected version, including qt.
| Package | Affected | Fixed in |
|---|---|---|
qt OSS-Fuzz | All versions | None |
How do I fix OSV-2022-327?
No fix has been published for OSV-2022-327 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is OSV-2022-327 being exploited?
There is no known exploitation of OSV-2022-327 in the wild and no public exploit code.