Buffer Overflow Fix in Linux Kernel IOMMU RISC-V Driver

Publication date: 2026-06-26

Last updated on: 2026-07-06

Assigner: kernel.org

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 <

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Meta Information

Published

2026-06-26

Last Modified

2026-07-06

Generated

2026-07-17

AI Q&A

2026-06-26

EPSS Evaluated

2026-07-15

NVD

CVE-2026-53312

EUVD

EUVD-2026-39847

Affected Vendors & Products

Vendor	Product	Version / Range
linux	linux_kernel	From 6.13 (inc) to 6.18.33 (exc)
linux	linux_kernel	From 6.19 (inc) to 7.0.10 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-835	The product contains an iteration or loop with an exit condition that cannot be reached, i.e., an infinite loop.

Attack-Flow Graph

Executive Summary

This vulnerability exists in the Linux kernel's iommu/riscv component. It involves an overflow issue on the invalidation path related to RISC-V's sign extended page table support. Specifically, when a gather operation reaches the end of ULONG_MAX, it causes an infinite loop due to an overflow. Additionally, there was an overflow in computing the length, which was fixed by adjusting the arithmetic operation.

Impact Analysis

The vulnerability can cause an infinite loop in the Linux kernel's iommu/riscv code path when handling certain page table operations. This could potentially lead to system hangs or denial of service conditions on affected systems using RISC-V architecture.

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