VULNERABILITY INTELLIGENCE
CVE-2023-53273
CVSS score5.5 MEDIUM
EPSS probability0.16%
CISA KEVNot currently listed
Published2025-09-16
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Description
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.
Weakness classification
- nvd@nist.gov: CWE-476
- 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-476