CVE-2022-50721
In the Linux kernel, the following vulnerability has been resolved: dmaengine: qcom-adm: fix wrong calling convention for prep_slave_sg The calling convention for pre_slave_sg is to return NULL on error and provide an error log to the system. Qcom-adm instead provide error pointer when an error occur. This indirectly cause kernel panic for example for the nandc driver that checks only if the pointer returned by device_prep_slave_sg is not NULL. Returning an error pointer makes nandc think the device_prep_slave_sg function correctly completed and makes the kernel panics later in the code. While nandc is the one that makes the kernel crash, it was pointed out that the real problem is qcom-adm not following calling convention for that function. To fix this, drop returning error pointer and return NULL with an error log.
Affected versions
Linux kernel versions
5.11
and later are affected. Fixed in
5.19.17,
6.0.3,
6.1
and their respective stable series.
References
The following references provide additional information about CVE-2022-50721 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.
-
PatchKernel patch commithttps://git.kernel.org/stable/c/5653bd0200944e5803fa8e32dc36aa49931312f9
-
PatchKernel patch commithttps://git.kernel.org/stable/c/9a041174c58a226e713f6cebd41eccec7a5cfa72
-
PatchKernel patch commithttps://git.kernel.org/stable/c/b9d2140c3badf4107973ad77c5a0ec3075705c85
Frequently asked questions
-
What is CVE-2022-50721?
CVE-2022-50721 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 5.11 onward and has been patched in 5.19.17, 6.0.3 and 6.1. CVE-2022-50721 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
-
Is there a patch available for CVE-2022-50721?
Yes — CVE-2022-50721 has been patched. Fixed versions include 5.19.17, 6.0.3 and 6.1. If you are running Linux kernel 5.11 or later up to the fix versions, apply the relevant patch for your kernel branch.
-
Is CVE-2022-50721 actively exploited?
No — CVE-2022-50721 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.