CVE-2023-53273

MEDIUM EPSS 4.2%
Published Sep 16, 20259mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Sep 16, 2025 9mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
4.2% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-476 NULL Pointer Dereference Memory Safety

Affected Products 9

VendorProductVersionRange
linuxlinux_kernel*≥5.8  –  <5.10.178
linuxlinux_kernel*≥5.11  –  <5.15.107
linuxlinux_kernel*≥5.16  –  <6.1.24
linuxlinux_kernel*≥6.2  –  <6.2.11
linuxlinux_kernel6.3any
linuxlinux_kernel6.3any
linuxlinux_kernel6.3any
linuxlinux_kernel6.3any
linuxlinux_kernel6.3any

References 5

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

Remediation

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