CVE-2022-49844 can: dev: fix skb drop check

What is CVE-2022-49844?

CVE-2022-49844 is a high-severity vulnerability in Linux kernel, published on 1 May 2025. It can only be exploited from the same machine or local network, with no action from the victim.

Official 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]

Weakness: CWE-125

Which versions are affected by CVE-2022-49844?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2022-49844?

Apply the vendor's patch.

Is CVE-2022-49844 being exploited?

There is no known exploitation of CVE-2022-49844 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as DEBIAN-CVE-2022-49844, GHSA-jjg4-p57c-87j3, UBUNTU-CVE-2022-49844.