CVE-2026-74273
Published: August 18, 2026Last modified: October 23, 2026
Description
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.
Status
| Product | Release | Package | Status |
|---|---|---|---|
| Alpaquita Linux | 23 LTS | linux-lts | Not affected (6.1.33-r0) |
| 25 LTS | linux-lts | Vulnerable (6.12.103-r0) | |
| Stream | linux-lts | Fixed (6.18.58-r0) |
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