CVE-2024-46739: linux kernel Null Dereference — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: uio_hv_generic: Fix kernel NULL pointer dereference in hv_uio_rescind For primary VM Bus channels, primary_channel pointer is always NULL. This pointer is valid only for the secondary channels. Also, rescind callback is meant for primary channels only. Fix NULL pointer dereference by retrieving the device_obj from the parent for the primary channel.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-476 CWE-476

Affected Products

Vendor	Product	Versions
linux	linux_kernel	4.16 — 4.19.322
linux	linux_kernel	4.20 — 5.4.284
linux	linux_kernel	5.5 — 5.10.226
linux	linux_kernel	5.11 — 5.15.167
linux	linux_kernel	5.16 — 6.1.110
linux	linux_kernel	6.2 — 6.6.51
linux	linux_kernel	6.7 — 6.10.10
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/1d8e020e51ab07e40f9dd00b52f1da7d96fec04c https://git.kernel.org/stable/c/2be373469be1774bbe03b0fa7e2854e65005b1cc https://git.kernel.org/stable/c/3005091cd537ef8cdb7530dcb2ecfba8d2ef475c https://git.kernel.org/stable/c/3d414b64ecf6fd717d7510ffb893c6f23acbf50e https://git.kernel.org/stable/c/928e399e84f4e80307dce44e89415115c473275b https://git.kernel.org/stable/c/de6946be9c8bc7d2279123433495af7c21011b99 https://git.kernel.org/stable/c/f38f46da80a2ab7d1b2f8fcb444c916034a2dac4 https://git.kernel.org/stable/c/fb1adbd7e50f3d2de56d0a2bb0700e2e819a329e

Other References

https://lists.debian.org/debian-lts-announce/2024/10/msg00003.html https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html

Frequently Asked Questions

What is CVE-2024-46739? +

In the Linux kernel, the following vulnerability has been resolved: uio_hv_generic: Fix kernel NULL pointer dereference in hv_uio_rescind For primary VM Bus channels, primary_channel pointer is always NULL. This pointer is valid only for the secondary channels. Also, rescind callback is meant for primary channels only. Fix NULL pointer dereference by retrieving the device_obj from the parent for the primary channel. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2024-46739? +

CVE-2024-46739 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2024-46739? +

CVE-2024-46739 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-46739? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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