What’s Vulnerable › Vulnerabilities

CVE-2024-46739: uio_hv_generic: Fix kernel NULL pointer dereference in hv_uio_rescind

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-09-18 · updated 2026-06-17
• Weakness: CWE-476

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.

Affected products

• Linux kernel: from 4.16 before 4.19.322; from 4.20 before 5.4.284; from 5.5 before 5.10.226; from 5.11 before 5.15.167; from 5.16 before 6.1.110; from 6.2 before 6.6.51 — fixed in 4.19.322, 5.10.226, 5.15.167, 5.4.284, 6.1.110, 6.10.10

How to fix

Upgrade to a fixed version: Linux kernel 4.19.322, 5.10.226, 5.15.167, 5.4.284. Check the vendor advisory for mitigations.

References

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

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