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Red Hat: CVE-2024-35790: kernel: usb: typec: altmodes/displayport: create sysfs nodes as driver's default device attribute group (Multiple Advisories)

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Red Hat: CVE-2024-35790: kernel: usb: typec: altmodes/displayport: create sysfs nodes as driver's default device attribute group (Multiple Advisories)

Severity
5
CVSS
(AV:L/AC:L/Au:S/C:N/I:N/A:C)
Published
05/17/2024
Created
08/13/2024
Added
08/12/2024
Modified
08/12/2024

Description

In the Linux kernel, the following vulnerability has been resolved: usb: typec: altmodes/displayport: create sysfs nodes as driver's default device attribute group The DisplayPort driver's sysfs nodes may be present to the userspace before typec_altmode_set_drvdata() completes in dp_altmode_probe. This means that a sysfs read can trigger a NULL pointer error by deferencing dp->hpd in hpd_show or dp->lock in pin_assignment_show, as dev_get_drvdata() returns NULL in those cases. Remove manual sysfs node creation in favor of adding attribute group as default for devices bound to the driver. The ATTRIBUTE_GROUPS() macro is not used here otherwise the path to the sysfs nodes is no longer compliant with the ABI.

Solution(s)

  • redhat-upgrade-kernel
  • redhat-upgrade-kernel-rt

References

  • CVE-2024-35790
  • RHSA-2024:5101
  • RHSA-2024:5102
  • 查看数 697
  • 已创建
  • 最后回复

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