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CVE-2024-26849

5.5 · MEDIUM
Published Apr 17, 2024 linux CWE-908 EPSS 0.22% (13th pctl)

Overview

CVE-2024-26849 is a medium-severity vulnerability affecting linux linux_kernel. 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 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 >= 6.1, < 6.1.81 Affected

References

Ref git.kernel.org/stable/c/000a68159c0326b46c42ec712ab98793e7e625a7 Ref git.kernel.org/stable/c/0ac219c4c3ab253f3981f346903458d20bacab32 Ref git.kernel.org/stable/c/7a9d14c63b35f89563c5ecbadf918ad64979712d Ref git.kernel.org/stable/c/80b40f9cb87f3bf5877dfb852765cf92bc03ca77 Ref git.kernel.org/stable/c/9a0d18853c280f6a0ee99f91619f2442a17a323a Ref git.kernel.org/stable/c/a2ab028151841cd833cb53eb99427e0cc990112d Ref git.kernel.org/stable/c/0ac219c4c3ab253f3981f346903458d20bacab32 Ref git.kernel.org/stable/c/7a9d14c63b35f89563c5ecbadf918ad64979712d Ref git.kernel.org/stable/c/9a0d18853c280f6a0ee99f91619f2442a17a323a Ref git.kernel.org/stable/c/a2ab028151841cd833cb53eb99427e0cc990112d

Frequently Asked Questions

What is CVE-2024-26849?

CVE-2024-26849 is a medium-severity vulnerability affecting linux linux_kernel. 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 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-2024-26849?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-26849 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

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