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.

EPSS

0.2% chance of exploitation in the next 30 days; higher than 10% of CVEs (scores of 2026-10-25)

Published

2026-08-15

Modified

2026-10-21

Record from

the NVD, synced 2026-10-22

References

• https://git.kernel.org/stable/c/8efa9fcc1d31b29b31e0ac4efe48624a729796bc
• https://git.kernel.org/stable/c/98c7e206af48b4433b2192cc1a538db2acc49876
• https://git.kernel.org/stable/c/b0b6a9c65cb72c901fdcc6ae83d7afd70cdca1b8
• https://git.kernel.org/stable/c/d91feb88692e81b00cd22f0125cfcd04970b4a0b
• https://git.kernel.org/stable/c/ecc86a28dc27509da511bb3f8c309750233e3177

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