CVE-2026-45981
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
16- osv-coords14 versionspkg:linux/kernelpkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2016.0
>= 3.10.0, < 6.6.128+ 13 more
- (no CPE)range: >= 3.10.0, < 6.6.128
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1.160000.2.19
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
- (no CPE)range: < 6.12.0-160000.37.1
Patches
Vulnerability mechanics
References
5- git.kernel.org/stable/c/6715560527e343a387e4a0d2e6c401748e89fa55nvdPatch
- git.kernel.org/stable/c/abb6e07f46a740cda4f07d1b561ae4eaa7a1df42nvdPatch
- git.kernel.org/stable/c/c35cfbb5341ba05ad1b4476ffc3c21cc3ff8f603nvdPatch
- git.kernel.org/stable/c/f65c75b0b9b5a390bc3beadcde0a6fbc3ad118f7nvdPatch
- git.kernel.org/stable/c/f96c5ccf95ae5f27218c1ce2d6a3ad2d3e105424nvdPatch
News mentions
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