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CVE-2024-50222

7.0 · HIGH

In the Linux kernel, the following vulnerability has been resolved: iov_iter: fix copy_page_from_iter_atomic() if KMAP_LOCAL_FORCE_MAP generic/077 on x86_32 CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP=y wi…

Published Nov 9, 2024EPSS 0.23%

Overview

CVE-2024-50222 is a high-severity vulnerability. It was published on November 9, 2024 and has a CVSS 3.1 base score of 7.0 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.0, rated HIGH. 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:

iov_iter: fix copy_page_from_iter_atomic() if KMAP_LOCAL_FORCE_MAP

generic/077 on x86_32 CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP=y with highmem,

on huge=always tmpfs, issues a warning and then hangs (interruptibly):

WARNING: CPU: 5 PID: 3517 at mm/highmem.c:622 kunmap_local_indexed+0x62/0xc9

CPU: 5 UID: 0 PID: 3517 Comm: cp Not tainted 6.12.0-rc4 #2

...

copy_page_from_iter_atomic+0xa6/0x5ec

generic_perform_write+0xf6/0x1b4

shmem_file_write_iter+0x54/0x67

Fix copy_page_from_iter_atomic() by limiting it in that case

(include/linux/skbuff.h skb_frag_must_loop() does similar).

But going forward, perhaps CONFIG_DEBUG_KMAP_LOCAL_FORCE_MAP is too

surprising, has outlived its usefulness, and should just be removed?

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/3a303409f271dfe0987b8f79595138340497a32dRefgit.kernel.org/stable/c/4f7ffa83fa79dd52efbaef366c850aaaae06a469Refgit.kernel.org/stable/c/c749d9b7ebbc5716af7a95f7768634b30d9446ec

How CyberStrike helps

Frequently asked questions

What is CVE-2024-50222?

CVE-2024-50222 is a high-severity vulnerability. It was published on November 9, 2024 and has a CVSS 3.1 base score of 7.0 (HIGH).

How severe is CVE-2024-50222?

This vulnerability has a CVSS 3.1 base score of 7.0, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2024-50222?

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-2024-50222?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-50222 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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