CVE-2023-53273

Summary

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

Drivers: vmbus: Check for channel allocation before looking up relids

relid2channel() assumes vmbus channel array to be allocated when called. However, in cases such as kdump/kexec, not all relids will be reset by the host. When the second kernel boots and if the guest receives a vmbus interrupt during vmbus driver initialization before vmbus_connect() is called, before it finishes, or if it fails, the vmbus interrupt service routine is called which in turn calls relid2channel() and can cause a null pointer dereference.

Print a warning and error out in relid2channel() for a channel id that's invalid in the second kernel.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux8b6a877c060ed6b86878fe66c7c6493a6054cf23 < 176c6b4889195fbe7016d9401175b48c5c9edf68affected
LinuxLinux8b6a877c060ed6b86878fe66c7c6493a6054cf23 < c373e49fbb87aa177819866ed9194ebc5414dfd6affected
LinuxLinux8b6a877c060ed6b86878fe66c7c6493a6054cf23 < 8c3f0ae5435fd20bb1e3a8308488aa6ac33151eeaffected
LinuxLinux8b6a877c060ed6b86878fe66c7c6493a6054cf23 < a5c44f3446a0565139b7d8abc78f58b86c398123affected
LinuxLinux8b6a877c060ed6b86878fe66c7c6493a6054cf23 < 1eb65c8687316c65140b48fad27133d583178e15affected
LinuxLinux5.8affected
LinuxLinux0 < 5.8unaffected
LinuxLinux5.10.178 <= 5.10.*unaffected
LinuxLinux5.15.107 <= 5.15.*unaffected
LinuxLinux6.1.24 <= 6.1.*unaffected
LinuxLinux6.2.11 <= 6.2.*unaffected
LinuxLinux6.3 <= *unaffected

Weaknesses

ADP Enrichment

CISA ADP Vulnrichment

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

References