CVE-2024-27009

Summary

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

s390/cio: fix race condition during online processing

A race condition exists in ccw_device_set_online() that can cause the online process to fail, leaving the affected device in an inconsistent state. As a result, subsequent attempts to set that device online fail with return code ENODEV.

The problem occurs when a path verification request arrives after a wait for final device state completed, but before the result state is evaluated.

Fix this by ensuring that the CCW-device lock is held between determining final state and checking result state.

Note that since:

commit 2297791c92d0 ("s390/cio: dont unregister subchannel from child-drivers")

path verification requests are much more likely to occur during boot, resulting in an increased chance of this race condition occurring.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux2297791c92d04a154ad29ba5a073f9f627982110 < 3076b3c38a704e10df5e143c213653309d532538affected
LinuxLinux2297791c92d04a154ad29ba5a073f9f627982110 < 559f3a6333397ab6cd4a696edd65a70b6be62c6eaffected
LinuxLinux2297791c92d04a154ad29ba5a073f9f627982110 < 2df56f4ea769ff81e51bbb05699989603bde9c49affected
LinuxLinux2297791c92d04a154ad29ba5a073f9f627982110 < a4234decd0fe429832ca81c4637be7248b88b49eaffected
LinuxLinux2297791c92d04a154ad29ba5a073f9f627982110 < 2d8527f2f911fab84aec04df4788c0c23af3df48affected
LinuxLinux5.15affected
LinuxLinux0 < 5.15unaffected
LinuxLinux5.15.157 <= 5.15.*unaffected
LinuxLinux6.1.88 <= 6.1.*unaffected
LinuxLinux6.6.29 <= 6.6.*unaffected
LinuxLinux6.8.8 <= 6.8.*unaffected
LinuxLinux6.9 <= *unaffected

Weaknesses

ADP Enrichment

CVE Program Container

Additional References

CISA ADP Vulnrichment

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

References