CVE-2026-53312 iommu/riscv: Remove overflows on the invalidation path

What is CVE-2026-53312?

CVE-2026-53312 is a medium-severity vulnerability in Linux kernel, published on 26 Jun 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:

iommu/riscv: Remove overflows on the invalidation path

Since RISC-V supports a sign extended page table it should support a gather->end of ULONG_MAX, but if this happens it will infinite loop because of the overflow.

Also avoid overflow computing the length by moving the +1 to the other side of the <

Weakness: CWE-835

Which versions are affected by CVE-2026-53312?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2026-53312?

Apply the vendor's patch.

Is CVE-2026-53312 being exploited?

There is no known exploitation of CVE-2026-53312 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2026-53312, DEBIAN-CVE-2026-53312, GHSA-h2cq-p42h-rq44, UBUNTU-CVE-2026-53312.