CVE-2022-50492: drm/msm: fix use-after-free on probe deferral
In the Linux kernel, the following vulnerability has been resolved:
drm/msm: fix use-after-free on probe deferral
The bridge counter was never reset when tearing down the DRM device so that stale pointers to deallocated structures would be accessed on the next tear down (e.g. after a second late bind deferral).
Given enough bridges and a few probe deferrals this could currently also lead to data beyond the bridge array being corrupted.
Patchwork: https://patchwork.freedesktop.org/patch/502665/
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Patch 502665
Event History
Frequently Asked Questions
What is the severity of CVE-2022-50492?
CVE-2022-50492 has a severity rating that indicates a moderate risk of exploitation due to the use-after-free vulnerability.
How do I fix CVE-2022-50492?
To fix CVE-2022-50492, update your Linux kernel to the latest version where the vulnerability has been patched.
What systems are affected by CVE-2022-50492?
CVE-2022-50492 affects specific versions of the Linux kernel that include the DRM subsystem.
What is the impact of CVE-2022-50492 on my system?
The impact of CVE-2022-50492 may include potential system crashes or exploitation due to accessing stale pointers.
When was CVE-2022-50492 disclosed?
CVE-2022-50492 was disclosed in 2022 as part of ongoing security improvements in the Linux kernel.