CVE-2026-74273
In the Linux kernel, the following vulnerability has been resolved: cxl/region: Block region delete during region creation Expand the range lock, rename it "regions_lock", to disable region deletion in the critical period between construct_region() and attach_target(), as well as the period between device_add() and registering the remove actions. Otherwise, userspace can confuse the kernel. It can violate the assumption the region stays registered through the completion of cxl_add_to_region(). It can violate the assumption that devm_add_action_or_reset() is working with a live 'struct cxl_region'. It is ok for the region to disappear outside of those windows as that mirrors device hotplug flows where the proper locks are held.
Affected versions
Linux kernel versions
6.3
and later are affected. Fixed in
7.1.5,
7.2-rc1
and their respective stable series.
References
2 totalFrequently asked questions
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What is CVE-2026-74273?
CVE-2026-74273 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.3 onward and has been patched in 7.1.5 and 7.2-rc1. CVE-2026-74273 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-74273?
Yes. CVE-2026-74273 has been patched. Fixed versions include 7.1.5 and 7.2-rc1. If you are running Linux kernel 6.3 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-74273 actively exploited?
No. CVE-2026-74273 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.