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CVE-2024-26849

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: netlink: add nla be16/32 types to minlen array BUG: KMSAN: uninit-value in nla_validate_range_unsigned lib/nlattr.c:222 [inline…

Published Apr 17, 2024CWE-908EPSS 0.22%

Overview

CVE-2024-26849 is a medium-severity vulnerability. It was published on April 17, 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:

netlink: add nla be16/32 types to minlen array

BUG: KMSAN: uninit-value in nla_validate_range_unsigned lib/nlattr.c:222 [inline]

BUG: KMSAN: uninit-value in nla_validate_int_range lib/nlattr.c:336 [inline]

BUG: KMSAN: uninit-value in validate_nla lib/nlattr.c:575 [inline]

BUG: KMSAN: uninit-value in __nla_validate_parse+0x2e20/0x45c0 lib/nlattr.c:631

nla_validate_range_unsigned lib/nlattr.c:222 [inline]

nla_validate_int_range lib/nlattr.c:336 [inline]

validate_nla lib/nlattr.c:575 [inline]

...

The message in question matches this policy:

[NFTA_TARGET_REV] = NLA_POLICY_MAX(NLA_BE32, 255),

but because NLA_BE32 size in minlen array is 0, the validation

code will read past the malformed (too small) attribute.

Note: Other attributes, e.g. BITFIELD32, SINT, UINT.. are also missing:

those likely should be added too.

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/000a68159c0326b46c42ec712ab98793e7e625a7Refgit.kernel.org/stable/c/0ac219c4c3ab253f3981f346903458d20bacab32Refgit.kernel.org/stable/c/7a9d14c63b35f89563c5ecbadf918ad64979712dRefgit.kernel.org/stable/c/80b40f9cb87f3bf5877dfb852765cf92bc03ca77Refgit.kernel.org/stable/c/9a0d18853c280f6a0ee99f91619f2442a17a323aRefgit.kernel.org/stable/c/a2ab028151841cd833cb53eb99427e0cc990112dRefgit.kernel.org/stable/c/0ac219c4c3ab253f3981f346903458d20bacab32Refgit.kernel.org/stable/c/7a9d14c63b35f89563c5ecbadf918ad64979712dRefgit.kernel.org/stable/c/9a0d18853c280f6a0ee99f91619f2442a17a323aRefgit.kernel.org/stable/c/a2ab028151841cd833cb53eb99427e0cc990112d

How CyberStrike helps

Frequently asked questions

What is CVE-2024-26849?

CVE-2024-26849 is a medium-severity vulnerability. It was published on April 17, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-26849?

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-2024-26849?

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-2024-26849?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-26849 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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