Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: bus: mhi: core: Fix invalid error returning in mhi_queue mhi_queue returns an error when the doorbell is not accessible in the current state. This can happen when the device is in non M0 state, like M3, and needs to be waken-up prior ringing the DB. This case is managed earlier by triggering an asynchronous M3 exit via controller resume/suspend callbacks, that in turn will cause M0 transition and DB update. So, since it's not an error but just delaying of doorbell update, there is no reason to return an error. This also fixes a use after free error for skb case, indeed a caller queuing skb will try to free the skb if the queueing fails, but in that case queueing has been done.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.12, < 5.12.3 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/0ecc1c70dcd32c0f081b173a1a5d89952686f271Patch
- https://git.kernel.org/stable/c/a99b661c3187365f81026d89b1133a76cd2652b3Patch
- https://git.kernel.org/stable/c/0ecc1c70dcd32c0f081b173a1a5d89952686f271Patch
- https://git.kernel.org/stable/c/a99b661c3187365f81026d89b1133a76cd2652b3Patch
FAQ
What is CVE-2021-46969?
CVE-2021-46969 is a vulnerability with a CVSS score of 7.8 (HIGH). In the Linux kernel, the following vulnerability has been resolved: bus: mhi: core: Fix invalid error returning in mhi_queue mhi_queue returns an error when the doorbell is not accessible in the cur...
How severe is CVE-2021-46969?
CVE-2021-46969 has been rated HIGH with a CVSS base score of 7.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-46969?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.