CVE-2022-49376

Summary

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

scsi: sd: Fix potential NULL pointer dereference

If sd_probe() sees an early error before sdkp->device is initialized, sd_zbc_release_disk() is called. This causes a NULL pointer dereference when sd_is_zoned() is called inside that function. Avoid this by removing the call to sd_zbc_release_disk() in sd_probe() error path.

This change is safe and does not result in zone information memory leakage because the zone information for a zoned disk is allocated only when sd_revalidate_disk() is called, at which point sdkp->disk_dev is fully set, resulting in sd_disk_release() being called when needed to cleanup a disk zone information using sd_zbc_release_disk().

Affected Software

VendorProductVersion RangeStatus
LinuxLinux89d9475610771b5e5fe1879075f0fc9ba6e3755f < c1f0187025905e9981000d44a92e159468b561a8affected
LinuxLinux89d9475610771b5e5fe1879075f0fc9ba6e3755f < 0fcb0b131cc90c8f523a293d84c58d0c7273c96faffected
LinuxLinux89d9475610771b5e5fe1879075f0fc9ba6e3755f < 78f8e96df06e2d04d82d4071c299b59d28744f47affected
LinuxLinux89d9475610771b5e5fe1879075f0fc9ba6e3755f < 3733439593ad12f7b54ae35c273ea6f15d692de3affected
LinuxLinux89d9475610771b5e5fe1879075f0fc9ba6e3755f < 05fbde3a77a4f1d62e4c4428f384288c1f1a0be5affected
LinuxLinux4.10affected
LinuxLinux0 < 4.10unaffected
LinuxLinux5.10.122 <= 5.10.*unaffected
LinuxLinux5.15.47 <= 5.15.*unaffected
LinuxLinux5.17.15 <= 5.17.*unaffected
LinuxLinux5.18.4 <= 5.18.*unaffected
LinuxLinux5.19 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

References