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CVE-2022-48977

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: can: af_can: fix NULL pointer dereference in can_rcv_filter Analogue to commit 8aa59e355949 ("can: af_can: fix NULL pointer der…

Published Oct 21, 2024CWE-476EPSS 0.24%

Overview

CVE-2022-48977 is a medium-severity vulnerability. It was published on October 21, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

can: af_can: fix NULL pointer dereference in can_rcv_filter

Analogue to commit 8aa59e355949 ("can: af_can: fix NULL pointer

dereference in can_rx_register()") we need to check for a missing

initialization of ml_priv in the receive path of CAN frames.

Since commit 4e096a18867a ("net: introduce CAN specific pointer in the

struct net_device") the check for dev->type to be ARPHRD_CAN is not

sufficient anymore since bonding or tun netdevices claim to be CAN

devices but do not initialize ml_priv accordingly.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/0acc442309a0a1b01bcdaa135e56e6398a49439cRefgit.kernel.org/stable/c/3982652957e8d79ac32efcb725450580650a8644Refgit.kernel.org/stable/c/c142cba37de29f740a3852f01f59876af8ae462aRefgit.kernel.org/stable/c/c42221efb1159d6a3c89e96685ee38acdce86b6fRefgit.kernel.org/stable/c/fcc63f2f7ee3038d53216edd0d8291e57c752557

How CyberStrike helps

Frequently asked questions

What is CVE-2022-48977?

CVE-2022-48977 is a medium-severity vulnerability. It was published on October 21, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-48977?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2022-48977?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2022-48977?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-48977 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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