CVE-2026-45981None▾ SunlitIn 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_coh…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 6.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
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.
Linux >= e5dcf0025d7af58f525590ac86ac27cb44714e8d < abb6e07f46a740cda4f07d1b561ae4eaa7a1df42Linux >= e5dcf0025d7af58f525590ac86ac27cb44714e8d < f96c5ccf95ae5f27218c1ce2d6a3ad2d3e105424Linux >= e5dcf0025d7af58f525590ac86ac27cb44714e8d < 6715560527e343a387e4a0d2e6c401748e89fa55Linux >= e5dcf0025d7af58f525590ac86ac27cb44714e8d < c35cfbb5341ba05ad1b4476ffc3c21cc3ff8f603Linux >= e5dcf0025d7af58f525590ac86ac27cb44714e8d < f65c75b0b9b5a390bc3beadcde0a6fbc3ad118f7Linux 3.10Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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