What’s Vulnerable › Vulnerabilities

CVE-2024-45027: usb: xhci: Check for xhci->interrupters being allocated in xhci_mem_clearup()

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-09-11 · updated 2026-06-17
• Weakness: CWE-459

Description

In the Linux kernel, the following vulnerability has been resolved: usb: xhci: Check for xhci->interrupters being allocated in xhci_mem_clearup() If xhci_mem_init() fails, it calls into xhci_mem_cleanup() to mop up the damage. If it fails early enough, before xhci->interrupters is allocated but after xhci->max_interrupters has been set, which happens in most (all?) cases, things get uglier, as xhci_mem_cleanup() unconditionally derefences xhci->interrupters. With prejudice. Gate the interrupt freeing loop with a check on xhci->interrupters being non-NULL. Found while debugging a DMA allocation issue that led the XHCI driver on this exact path.

Affected products

• Linux kernel: from 6.8 before 6.10.7; 6.11-rc1, 6.11-rc2, 6.11-rc3 — fixed in 6.10.7

How to fix

Upgrade to a fixed version: Linux kernel 6.10.7. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3efb29f6a78d4746f958c1ab6cd7981c5762f03b
• https://git.kernel.org/stable/c/770cacc75b0091ece17349195d72133912c1ca7c
• https://git.kernel.org/stable/c/dcdb52d948f3a17ccd3fce757d9bd981d7c32039

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