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CVE-2024-26805

5.5 · MEDIUM
Published Apr 4, 2024 linux CWE-908 EPSS 0.24% (15th pctl)

Overview

CVE-2024-26805 is a medium-severity vulnerability affecting linux linux_kernel. It was published on April 4, 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: Fix kernel-infoleak-after-free in __skb_datagram_iter

syzbot reported the following uninit-value access issue [1]:

netlink_to_full_skb() creates a new `skb` and puts the `skb->data`

passed as a 1st arg of netlink_to_full_skb() onto new `skb`. The data

size is specified as `len` and passed to skb_put_data(). This `len`

is based on `skb->end` that is not data offset but buffer offset. The

`skb->end` contains data and tailroom. Since the tailroom is not

initialized when the new `skb` created, KMSAN detects uninitialized

memory area when copying the data.

This patch resolved this issue by correct the len from `skb->end` to

`skb->len`, which is the actual data offset.

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

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

BUG: KMSAN: kernel-infoleak-after-free in iterate_u

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 >= 3.12.49, < 3.13 Affected

References

Ref git.kernel.org/stable/c/0b27bf4c494d61e5663baa34c3edd7ccebf0ea44 Ref git.kernel.org/stable/c/59fc3e3d049e39e7d0d271f20dd5fb47c57faf1d Ref git.kernel.org/stable/c/661779e1fcafe1b74b3f3fe8e980c1e207fea1fd Ref git.kernel.org/stable/c/9ae51361da43270f4ba0eb924427a07e87e48777 Ref git.kernel.org/stable/c/c71ed29d15b1a1ed6c464f8c3536996963046285 Ref git.kernel.org/stable/c/d3ada42e534a83b618bbc1e490d23bf0fdae4736 Ref git.kernel.org/stable/c/ec343a55b687a452f5e87f3b52bf9f155864df65 Ref git.kernel.org/stable/c/f19d1f98e60e68b11fc60839105dd02a30ec0d77 Ref git.kernel.org/stable/c/0b27bf4c494d61e5663baa34c3edd7ccebf0ea44 Ref git.kernel.org/stable/c/59fc3e3d049e39e7d0d271f20dd5fb47c57faf1d

Frequently Asked Questions

What is CVE-2024-26805?

CVE-2024-26805 is a medium-severity vulnerability affecting linux linux_kernel. It was published on April 4, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-26805?

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-2024-26805?

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-2024-26805?

CyberStrike's AI-powered security agents can automatically detect CVE-2024-26805 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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