CVE-2024-26747: usb: roles: fix NULL pointer issue when put module's reference

Severity: medium (CVSS 4.4 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: 2024-04-03 · updated 2026-06-17
Weakness: CWE-476

Description

In the Linux kernel, the following vulnerability has been resolved: usb: roles: fix NULL pointer issue when put module's reference In current design, usb role class driver will get usb_role_switch parent's module reference after the user get usb_role_switch device and put the reference after the user put the usb_role_switch device. However, the parent device of usb_role_switch may be removed before the user put the usb_role_switch. If so, then, NULL pointer issue will be met when the user put the parent module's reference. This will save the module pointer in structure of usb_role_switch. Then, we don't need to find module by iterating long relations.

Affected products

Debian Linux: 10.0
Linux kernel: from 4.19 before 5.10.211; from 5.11 before 5.15.150; from 5.16 before 6.1.80; from 6.2 before 6.6.19; from 6.7 before 6.7.7; 6.8-rc1, 6.8-rc2, 6.8-rc3, 6.8-rc4, 6.8-rc5 — fixed in 5.10.211, 5.15.150, 6.1.80, 6.6.19, 6.7.7

How to fix

Upgrade to a fixed version: Linux kernel 5.10.211, 5.15.150, 6.1.80, 6.6.19. Check the vendor advisory for mitigations.

References

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