CVE-2023-53273

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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/176c6b4889195fbe7016d9401175b48c5c9edf68	Patch
https://git.kernel.org/stable/c/1eb65c8687316c65140b48fad27133d583178e15	Patch
https://git.kernel.org/stable/c/8c3f0ae5435fd20bb1e3a8308488aa6ac33151ee	Patch
https://git.kernel.org/stable/c/a5c44f3446a0565139b7d8abc78f58b86c398123	Patch
https://git.kernel.org/stable/c/c373e49fbb87aa177819866ed9194ebc5414dfd6	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:6.3:rc1::::::
	cpe:2.3:o:linux:linux_kernel:6.3:rc2::::::
	cpe:2.3:o:linux:linux_kernel:6.3:rc3::::::
	cpe:2.3:o:linux:linux_kernel:6.3:rc4::::::
	cpe:2.3:o:linux:linux_kernel:6.3:rc5::::::

History

No history.

Information

Published : 2025-09-16 08:15

Updated : 2026-01-14 19:16

NVD link : CVE-2023-53273

Mitre link : CVE-2023-53273

CVE.ORG link : CVE-2023-53273

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-476

NULL Pointer Dereference

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