CVE-2022-48636

Summary

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

s390/dasd: fix Oops in dasd_alias_get_start_dev due to missing pavgroup

Fix Oops in dasd_alias_get_start_dev() function caused by the pavgroup pointer being NULL.

The pavgroup pointer is checked on the entrance of the function but without the lcu->lock being held. Therefore there is a race window between dasd_alias_get_start_dev() and _lcu_update() which sets pavgroup to NULL with the lcu->lock held.

Fix by checking the pavgroup pointer with lcu->lock held.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux8e09f21574ea3028d5629e5de759e0b196c690c5 < d86b4267834e6d4af62e3073e48166e349ab1b70affected
LinuxLinux8e09f21574ea3028d5629e5de759e0b196c690c5 < 49f401a98b318761ca2e15d4c7869a20043fbed4affected
LinuxLinux8e09f21574ea3028d5629e5de759e0b196c690c5 < aaba5ff2742043705bc4c02fd0b2b246e2e16da1affected
LinuxLinux8e09f21574ea3028d5629e5de759e0b196c690c5 < 2e473351400e3dd66f0b71eddcef82ee45a584c1affected
LinuxLinux8e09f21574ea3028d5629e5de759e0b196c690c5 < f5fcc9d6d71d9ff7fdbdd4b89074e6e24fffc20baffected
LinuxLinux8e09f21574ea3028d5629e5de759e0b196c690c5 < d3a67c21b18f33c79382084af556557c442f12a6affected
LinuxLinux8e09f21574ea3028d5629e5de759e0b196c690c5 < 650a2e79d176db753654d3dde88e53a2033036acaffected
LinuxLinux8e09f21574ea3028d5629e5de759e0b196c690c5 < db7ba07108a48c0f95b74fabbfd5d63e924f992daffected
LinuxLinux2.6.25affected
LinuxLinux0 < 2.6.25unaffected
LinuxLinux4.9.330 <= 4.9.*unaffected
LinuxLinux4.14.295 <= 4.14.*unaffected
LinuxLinux4.19.260 <= 4.19.*unaffected
LinuxLinux5.4.215 <= 5.4.*unaffected
LinuxLinux5.10.146 <= 5.10.*unaffected
LinuxLinux5.15.71 <= 5.15.*unaffected
LinuxLinux5.19.12 <= 5.19.*unaffected
LinuxLinux6.0 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

CVE Program Container

Additional References

References