CVE-2021-46969
bus: mhi: core: Fix invalid error returning in mhi_queue
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.
INFO
Published Date :
Feb. 27, 2024, 7:04 p.m.
Last Modified :
Jan. 8, 2025, 5:19 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | [email protected] |
Solution
- There is no known solution at this time.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2021-46969.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2021-46969 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2021-46969
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2021-46969 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2021-46969 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jan. 08, 2025
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Added CWE NIST CWE-416 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.12 up to (excluding) 5.12.3 Changed Reference Type https://git.kernel.org/stable/c/0ecc1c70dcd32c0f081b173a1a5d89952686f271 No Types Assigned https://git.kernel.org/stable/c/0ecc1c70dcd32c0f081b173a1a5d89952686f271 Patch Changed Reference Type https://git.kernel.org/stable/c/0ecc1c70dcd32c0f081b173a1a5d89952686f271 No Types Assigned https://git.kernel.org/stable/c/0ecc1c70dcd32c0f081b173a1a5d89952686f271 Patch Changed Reference Type https://git.kernel.org/stable/c/a99b661c3187365f81026d89b1133a76cd2652b3 No Types Assigned https://git.kernel.org/stable/c/a99b661c3187365f81026d89b1133a76cd2652b3 Patch Changed Reference Type https://git.kernel.org/stable/c/a99b661c3187365f81026d89b1133a76cd2652b3 No Types Assigned https://git.kernel.org/stable/c/a99b661c3187365f81026d89b1133a76cd2652b3 Patch -
CVE Modified by af854a3a-2127-422b-91ae-364da2661108
Nov. 21, 2024
Action Type Old Value New Value Added Reference https://git.kernel.org/stable/c/0ecc1c70dcd32c0f081b173a1a5d89952686f271 Added Reference https://git.kernel.org/stable/c/a99b661c3187365f81026d89b1133a76cd2652b3 -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 28, 2024
Action Type Old Value New Value -
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
May. 14, 2024
Action Type Old Value New Value -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Feb. 27, 2024
Action Type Old Value New Value Added 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. Added Reference Linux https://git.kernel.org/stable/c/a99b661c3187365f81026d89b1133a76cd2652b3 [No types assigned] Added Reference Linux https://git.kernel.org/stable/c/0ecc1c70dcd32c0f081b173a1a5d89952686f271 [No types assigned]