Riskcovery

CVE-2026-80954

i3c: Fix unlocked dereference of dev->desc in i3c_device_get_supported_xfer_mode()

State
Published
Severity
7.8 High
Published
Sep 11, 2026
Updated
Oct 19, 2026
Reserved
Aug 26, 2026

Read the record on cve.org

Description

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

i3c: Fix unlocked dereference of dev->desc in i3c_device_get_supported_xfer_mode()

i3c_device_get_supported_xfer_mode() uses dev->desc to obtain the master controller. However, dev->desc must not be dereferenced unless bus->lock is held, and this function does not take that lock.

The function only needs access to the master controller associated with the device's bus. Use dev->bus instead, which is always valid for the lifetime of the device and does not require dereferencing dev->desc.

Scores

CVSSScoreVectorSource
3.17.8 HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HLinux

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 256a21743d911f94ce92fe28f793cd586f3860b2 to before 251db58324ea4792c3f9f692ab09be148e051969Affected
  • 256a21743d911f94ce92fe28f793cd586f3860b2 to before 8bed7f4fa710914b7f05fd59998316bfb4d43385Affected
LinuxLinux
  • 6.19Affected
  • before 6.19Not affected
  • 7.2.4 through 7.2.*Not affected
  • 7.3 and laterNot affected

References

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