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CVE-2022-49070

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: fbdev: Fix unregistering of framebuffers without device OF framebuffers do not have an underlying device in the Linux device hi…

Published Feb 26, 2025CWE-476EPSS 0.26%

Overview

CVE-2022-49070 is a medium-severity vulnerability. It was published on February 26, 2025 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:

fbdev: Fix unregistering of framebuffers without device

OF framebuffers do not have an underlying device in the Linux

device hierarchy. Do a regular unregister call instead of hot

unplugging such a non-existing device. Fixes a NULL dereference.

An example error message on ppc64le is shown below.

BUG: Kernel NULL pointer dereference on read at 0x00000060

Faulting instruction address: 0xc00000000080dfa4

Oops: Kernel access of bad area, sig: 11 [#1]

LE PAGE_SIZE=64K MMU=Hash SMP NR_CPUS=2048 NUMA pSeries

[...]

CPU: 2 PID: 139 Comm: systemd-udevd Not tainted 5.17.0-ae085d7f9365 #1

NIP: c00000000080dfa4 LR: c00000000080df9c CTR: c000000000797430

REGS: c000000004132fe0 TRAP: 0300 Not tainted (5.17.0-ae085d7f9365)

MSR: 8000000002009033 <SF,VEC,EE,ME,IR,DR,RI,LE> CR: 28228282 XER: 20000000

CFAR: c00000000000c80c DAR: 0000000000000060 DSISR: 40000000 IRQMASK: 0

GPR00: c00000000080df9c c0000000041

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/0f525289ff0ddeb380813bd81e0f9bdaaa1c9078Refgit.kernel.org/stable/c/2388f826cdc9af2651991adc0feb79de9bdf2232Refgit.kernel.org/stable/c/de33df481545974ba47c46f05194e769e4307843Refgit.kernel.org/stable/c/feed87ff122b1640c221d4dd559442ab2cd50bb1

How CyberStrike helps

Frequently asked questions

What is CVE-2022-49070?

CVE-2022-49070 is a medium-severity vulnerability. It was published on February 26, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-49070?

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-2022-49070?

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-2022-49070?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-49070 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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