Riskcovery

CVE-2024-27027

dpll: fix dpll_xa_ref_*_del() for multiple registrations

State
Published
Severity
Not scored
Published
May 1, 2024
Updated
May 11, 2026
Reserved
Feb 19, 2024

Read the record on cve.org

Description

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

dpll: fix dpll_xa_ref_*_del() for multiple registrations

Currently, if there are multiple registrations of the same pin on the same dpll device, following warnings are observed: WARNING: CPU: 5 PID: 2212 at drivers/dpll/dpll_core.c:143 dpll_xa_ref_pin_del.isra.0+0x21e/0x230 WARNING: CPU: 5 PID: 2212 at drivers/dpll/dpll_core.c:223 __dpll_pin_unregister+0x2b3/0x2c0

The problem is, that in both dpll_xa_ref_dpll_del() and dpll_xa_ref_pin_del() registration is only removed from list in case the reference count drops to zero. That is wrong, the registration has to be removed always.

To fix this, remove the registration from the list and free it unconditionally, instead of doing it only when the ref reference counter reaches zero.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

ProductVersions
LinuxLinux
  • 9431063ad323ac864750aeba4d304389bc42ca4e to before 769324eb35143462542cdb15483cdaf4877bf661Affected
  • 9431063ad323ac864750aeba4d304389bc42ca4e to before b27e32e9367dac024cd6f61f22655714f483fd67Affected
  • 9431063ad323ac864750aeba4d304389bc42ca4e to before b446631f355ece73b13c311dd712c47381a23172Affected
LinuxLinux
  • 6.7Affected
  • before 6.7Not affected
  • 6.7.11 through 6.7.*Not affected
  • 6.8.2 through 6.8.*Not affected
  • 6.9 and laterNot affected

References

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