CVE-2024-39292

Summary

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

um: Add winch to winch_handlers before registering winch IRQ

Registering a winch IRQ is racy, an interrupt may occur before the winch is added to the winch_handlers list.

If that happens, register_winch_irq() adds to that list a winch that is scheduled to be (or has already been) freed, causing a panic later in winch_cleanup().

Avoid the race by adding the winch to the winch_handlers list before registering the IRQ, and rolling back if um_request_irq() fails.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux42a359e31a0e438b5b978a8f0fecdbd3c86bb033 < 66ea9a7c6824821476914bed21a476cd20094f33affected
LinuxLinux42a359e31a0e438b5b978a8f0fecdbd3c86bb033 < dc1ff95602ee908fcd7d8acee7a0dadb61b1a0c0affected
LinuxLinux42a359e31a0e438b5b978a8f0fecdbd3c86bb033 < 351d1a64544944b44732f6a64ed65573b00b9e14affected
LinuxLinux42a359e31a0e438b5b978a8f0fecdbd3c86bb033 < 31960d991e43c8d6dc07245f19fc13398e90ead2affected
LinuxLinux42a359e31a0e438b5b978a8f0fecdbd3c86bb033 < 0c02d425a2fbe52643a5859a779db0329e7dddd4affected
LinuxLinux42a359e31a0e438b5b978a8f0fecdbd3c86bb033 < 434a06c38ee1217a8baa0dd7c37cc85d50138fb0affected
LinuxLinux42a359e31a0e438b5b978a8f0fecdbd3c86bb033 < 73b8e21f76c7dda4905655d2e2c17dc5a73b87f1affected
LinuxLinux42a359e31a0e438b5b978a8f0fecdbd3c86bb033 < a0fbbd36c156b9f7b2276871d499c9943dfe5101affected
LinuxLinux2.6.23affected
LinuxLinux0 < 2.6.23unaffected
LinuxLinux4.19.316 <= 4.19.*unaffected
LinuxLinux5.4.278 <= 5.4.*unaffected
LinuxLinux5.10.219 <= 5.10.*unaffected
LinuxLinux5.15.161 <= 5.15.*unaffected
LinuxLinux6.1.93 <= 6.1.*unaffected
LinuxLinux6.6.33 <= 6.6.*unaffected
LinuxLinux6.9.4 <= 6.9.*unaffected
LinuxLinux6.10 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References