CVE-2024-47666 scsi: pm80xx: Set phy->enable_completion only when we wait for it

What is CVE-2024-47666?

CVE-2024-47666 is a medium-severity use after free vulnerability in Linux kernel, published on 9 Oct 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

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

scsi: pm80xx: Set phy->enable_completion only when we wait for it

pm8001_phy_control() populates the enable_completion pointer with a stack address, sends a PHY_LINK_RESET / PHY_HARD_RESET, waits 300 ms, and returns. The problem arises when a phy control response comes late. After 300 ms the pm8001_phy_control() function returns and the passed enable_completion stack address is no longer valid. Late phy control response invokes complete() on a dangling enable_completion pointer which leads to a kernel crash.

Weakness: CWE-416

Which versions are affected by CVE-2024-47666?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2024-47666?

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-2024-47666 being exploited?

There is no known exploitation of CVE-2024-47666 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 AZL-50749, BELL-CVE-2024-47666, DEBIAN-CVE-2024-47666, GHSA-89mf-4cg3-w93v, ROOT-OS-DEBIAN-11-CVE-2024-47666, ROOT-OS-DEBIAN-12-CVE-2024-47666 and 2 more.