CVE-2024-43883 usb: vhci-hcd: Do not drop references before new references are gained

What is CVE-2024-43883?

CVE-2024-43883 is a critical use after free vulnerability in Linux kernel, published on 23 Aug 2024. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

usb: vhci-hcd: Do not drop references before new references are gained

At a few places the driver carries stale pointers to references that can still be used. Make sure that does not happen. This strictly speaking closes ZDI-CAN-22273, though there may be similar races in the driver.

Weakness: CWE-416

Which versions are affected by CVE-2024-43883?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-43883?

Apply the vendor's patch.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2024-43883 being exploited?

There is no known exploitation of CVE-2024-43883 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2024-43883, DEBIAN-CVE-2024-43883, GHSA-75gr-j667-pp37, UBUNTU-CVE-2024-43883.