CVE-2022-49844

can: dev: fix skb drop check

Description

In the Linux kernel, the following vulnerability has been resolved: can: dev: fix skb drop check In commit a6d190f8c767 ("can: skb: drop tx skb if in listen only mode") the priv->ctrlmode element is read even on virtual CAN interfaces that do not create the struct can_priv at startup. This out-of-bounds read may lead to CAN frame drops for virtual CAN interfaces like vcan and vxcan. This patch mainly reverts the original commit and adds a new helper for CAN interface drivers that provide the required information in struct can_priv. [mkl: patch pch_can, too]

Category

7.1
CVSS
Severity: High
CVSS 3.1 •
EPSS 0.01%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/386c49fe31ee748e053860b3bac7794a933ac9ac patch
https://git.kernel.org/stable/c/ae64438be1923e3c1102d90fd41db7afcfaf54cc patch

Frequently Asked Questions

What is the severity of CVE-2022-49844?
CVE-2022-49844 has been scored as a high severity vulnerability.
How to fix CVE-2022-49844?
To fix CVE-2022-49844, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-49844 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-49844 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-49844?
CVE-2022-49844 affects Linux Linux, Linux Linux.
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