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CVE-2022-50344

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: ext4: fix null-ptr-deref in ext4_write_info I caught a null-ptr-deref bug as follows: =========================================…

Published Sep 16, 2025CWE-476EPSS 0.16%

Overview

CVE-2022-50344 is a medium-severity vulnerability. It was published on September 16, 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:

ext4: fix null-ptr-deref in ext4_write_info

I caught a null-ptr-deref bug as follows:

==================================================================

KASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f]

CPU: 1 PID: 1589 Comm: umount Not tainted 5.10.0-02219-dirty #339

RIP: 0010:ext4_write_info+0x53/0x1b0

[...]

Call Trace:

dquot_writeback_dquots+0x341/0x9a0

ext4_sync_fs+0x19e/0x800

__sync_filesystem+0x83/0x100

sync_filesystem+0x89/0xf0

generic_shutdown_super+0x79/0x3e0

kill_block_super+0xa1/0x110

deactivate_locked_super+0xac/0x130

deactivate_super+0xb6/0xd0

cleanup_mnt+0x289/0x400

__cleanup_mnt+0x16/0x20

task_work_run+0x11c/0x1c0

exit_to_user_mode_prepare+0x203/0x210

syscall_exit_to_user_mode+0x5b/0x3a0

do_syscall_64+0x59/0x70

entry_SYSCALL_64_after_hwframe+0x44/0xa9

==================================================================

Above issue may happen as follows:

-------------

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/3638aa1c7d87c0ca0aef23cf58cae2c48e7daca4Refgit.kernel.org/stable/c/4a657319cfabd6199fd0b7b65bbebf6ded7a11c1Refgit.kernel.org/stable/c/533c60a0b97cee5daab376933f486207e6680fb7Refgit.kernel.org/stable/c/947264e00c46de19a016fd81218118c708fed2f3Refgit.kernel.org/stable/c/bb420e8afc854d2a1caaa23a0c129839acfb7888Refgit.kernel.org/stable/c/dc451578446afd03c0c21913993c08898a691435Refgit.kernel.org/stable/c/f34ab95162763cd7352f46df169296eec28b688dRefgit.kernel.org/stable/c/f4b5ff0b794aa94afac7269c494550ca2f66511bRefgit.kernel.org/stable/c/f9c1f248607d5546075d3f731e7607d5571f2b60

How CyberStrike helps

Frequently asked questions

What is CVE-2022-50344?

CVE-2022-50344 is a medium-severity vulnerability. It was published on September 16, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-50344?

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-2022-50344?

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-2022-50344?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-50344 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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