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DEBIAN-CVE-2026-45981
No affected components available
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.
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The vulnerability requires local access to the device to be exploited. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the availability of the system.
Exploitation attempts have been detected. Elevated vigilance and prompt remediation are advised.
Probability that this vulnerability will be exploited in the wild within the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
- CVE-2026-45981Upstream
- EUVD-2026-32265Upstream
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