CVE-2024-35790

Summary

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.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 < 6b989ea1c479533ab8dbfbeb1704c94b1d3320daaffected
LinuxLinux0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 < 9794ffd9d0c39ee070fbd733f862bbe89b28ba33affected
LinuxLinux0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 < f1c5ddaef506e3517dce338c08a60663b1521920affected
LinuxLinux0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 < 4a22aeac24d0d5f26ba741408e8b5a4be6dc5dc0affected
LinuxLinux0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 < 0ad011776c057ce881b7fd6d8c79ecd459c087e9affected
LinuxLinux0e3bb7d6894d9b6e67d6382bb03a46a1dc989588 < 165376f6b23e9a779850e750fb2eb06622e5a531affected
LinuxLinux4.19affected
LinuxLinux0 < 4.19unaffected
LinuxLinux5.10.238 <= 5.10.*unaffected
LinuxLinux5.15.184 <= 5.15.*unaffected
LinuxLinux6.1.140 <= 6.1.*unaffected
LinuxLinux6.6.24 <= 6.6.*unaffected
LinuxLinux6.7.12 <= 6.7.*unaffected
LinuxLinux6.8 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: no
    • Technical Impact: partial

CVE Program Container

Additional References

References