CVE-2026-74275 cxl/region: Fix out-of-bounds access in cxl_cancel_auto_attach()
An out-of-bounds access in the Linux kernel CXL region driver allows attackers to potentially execute code or cause a denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-74275?
CVE-2026-74275 is a high-severity memory corruption vulnerability in Linux, published on 15 Aug 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
cxl/region: Fix out-of-bounds access in cxl_cancel_auto_attach()
In cxl_cancel_auto_attach(), it assumes cxled->pos is a valid index for accessing p->targets[]. However, cxled->pos can be set to negative errno in cxl_region_sort_targets() if cxl_calc_interleave_pos() fails. This causes the driver to use a negative index to access p->targets[], resulting in out-of-bounds access.
Fix it by walking p->targets[] instead of using cxled->pos directly.
Which versions are affected by CVE-2026-74275?
How do I fix CVE-2026-74275?
Apply the vendor's patch.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-74275 being exploited?
There is no known exploitation of CVE-2026-74275 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-74275, GHSA-mxc8-68wc-4vvm, UBUNTU-CVE-2026-74275.