CVE-2026-64153 drm/msm: Fix iommu_map_sgtable() return value check and avoid WARN
A missing return value check in the Linux kernel's DRM MSM driver can cause a warning and potential denial of service.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-64153?
CVE-2026-64153 is a high-severity vulnerability in Linux kernel, published on 19 Jul 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:
drm/msm: Fix iommu_map_sgtable() return value check and avoid WARN
Commit "iommu: return full error code from iommu_map_sg[_atomic]()" changed iommu_map_sgtable() to return an ssize_t and negative values in error cases, rather than a size_t and a zero.
Store the return value in the appropriate type and in case of error, return it rather than WARNing.
Patchwork: https://patchwork.freedesktop.org/patch/719685/
Which versions are affected by CVE-2026-64153?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-64153?
Apply the vendor's patch.
Is CVE-2026-64153 being exploited?
There is no known exploitation of CVE-2026-64153 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as BELL-CVE-2026-64153, DEBIAN-CVE-2026-64153, GHSA-fp97-fp2h-3988, UBUNTU-CVE-2026-64153.