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CVE-2024-35893

5.5 · MEDIUM
Published May 19, 2024 linux CWE-908 EPSS 0.23% (14th pctl)

Overview

CVE-2024-35893 is a medium-severity vulnerability affecting linux linux_kernel. It was published on May 19, 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:

net/sched: act_skbmod: prevent kernel-infoleak

syzbot found that tcf_skbmod_dump() was copying four bytes

from kernel stack to user space [1].

The issue here is that 'struct tc_skbmod' has a four bytes hole.

We need to clear the structure before filling fields.

[1]

BUG: KMSAN: kernel-infoleak in instrument_copy_to_user include/linux/instrumented.h:114 [inline]

BUG: KMSAN: kernel-infoleak in copy_to_user_iter lib/iov_iter.c:24 [inline]

BUG: KMSAN: kernel-infoleak in iterate_ubuf include/linux/iov_iter.h:29 [inline]

BUG: KMSAN: kernel-infoleak in iterate_and_advance2 include/linux/iov_iter.h:245 [inline]

BUG: KMSAN: kernel-infoleak in iterate_and_advance include/linux/iov_iter.h:271 [inline]

BUG: KMSAN: kernel-infoleak in _copy_to_iter+0x366/0x2520 lib/iov_iter.c:185

instrument_copy_to_user include/linux/instrumented.h:114 [inline]

copy_to_user_iter lib/iov_iter.c:24 [inline]

iterate_ubuf include/linux/io

Remediation

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. 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.

Affected Products

Vendor Product Versions Status
linux linux_kernel >= 4.9, < 4.19.312 Affected

References

Ref git.kernel.org/stable/c/55d3fe7b2b7bc354e7cbc1f7b8f98a29ccd5a366 Ref git.kernel.org/stable/c/5e45dc4408857305f4685abfd7a528a1e58b51b5 Ref git.kernel.org/stable/c/729ad2ac2a2cdc9f4a4bdfd40bfd276e6bc33924 Ref git.kernel.org/stable/c/7bb2c7103d8c13b06a57bf997b8cdbe93cd7283c Ref git.kernel.org/stable/c/a097fc199ab5f4b5392c5144034c0d2148b55a14 Ref git.kernel.org/stable/c/d313eb8b77557a6d5855f42d2234bd592c7b50dd Ref git.kernel.org/stable/c/f190a4aa03cbd518bd9c62a66e1233984f5fd2ec Ref git.kernel.org/stable/c/f356eb2fb567e0931143ac1769ac802d3b3e2077 Ref git.kernel.org/stable/c/55d3fe7b2b7bc354e7cbc1f7b8f98a29ccd5a366 Ref git.kernel.org/stable/c/5e45dc4408857305f4685abfd7a528a1e58b51b5

Frequently Asked Questions

What is CVE-2024-35893?

CVE-2024-35893 is a medium-severity vulnerability affecting linux linux_kernel. It was published on May 19, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-35893?

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-2024-35893?

Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. 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-2024-35893?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-35893 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.

How CyberStrike Helps

Autonomous Discovery

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HackBrowser

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