Improper Update of Reference Count Affecting kernel-devel package, versions *


Severity

Recommended
0.0
medium
0
10

Based on CentOS security rating.

Threat Intelligence

EPSS
0.02% (8th percentile)

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  • Snyk IDSNYK-CENTOS10-KERNELDEVEL-16939062
  • published28 May 2026
  • disclosed27 May 2026

Introduced: 27 May 2026

NewCVE-2026-45981  (opens in a new tab)
CWE-911  (opens in a new tab)

How to fix?

There is no fixed version for Centos:10 kernel-devel.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-devel package and not the kernel-devel package as distributed by Centos. See How to fix? for Centos:10 relevant fixed versions and status.

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

s390/cio: Fix device lifecycle handling in css_alloc_subchannel()

css_alloc_subchannel() calls device_initialize() before setting up the DMA masks. If dma_set_coherent_mask() or dma_set_mask() fails, the error path frees the subchannel structure directly, bypassing the device model reference counting.

Once device_initialize() has been called, the embedded struct device must be released via put_device(), allowing the release callback to free the container structure.

Fix the error path by dropping the initial device reference with put_device() instead of calling kfree() directly.

This ensures correct device lifetime handling and avoids potential use-after-free or double-free issues.

CVSS Base Scores

version 3.1