CVE-2025-40293

Linux Kernel 6.1.0-6.1.158, 6.2.0-6.6.116, 6.7.0-6.12.57, 6.13.0-6.17.7 - DoS via IOMMU Integer Overflow

Title source: llm

Description

In the Linux kernel, the following vulnerability has been resolved: iommufd: Don't overflow during division for dirty tracking If pgshift is 63 then BITS_PER_TYPE(*bitmap->bitmap) * pgsize will overflow to 0 and this triggers divide by 0. In this case the index should just be 0, so reorganize things to divide by shift and avoid hitting any overflows.

References (5)

Core 5

Core References

Patch

https://git.kernel.org/stable/c/07105e61882ff4a7d58db63cc5f9e90c6c60506c

Patch

https://git.kernel.org/stable/c/4c8a4f1d34eced168cc0b3a3dfe7b6dcc2090f69

Patch

https://git.kernel.org/stable/c/de7f2c67ceb1941b05b04ac35458a03e93cc57b1

Patch

https://git.kernel.org/stable/c/dbf316fc90aa954dcd5440817f4b944627ed63e0

Patch

https://git.kernel.org/stable/c/cb30dfa75d55eced379a42fd67bd5fb7ec38555e

Scores

EPSS 0.0004

EPSS Percentile 13.4%

Details

Status published

Products (16)

linux/Kernel 6.1.0 - 6.1.159linux

linux/Kernel 6.13.0 - 6.17.8linux

linux/Kernel 6.2.0 - 6.6.117linux

linux/Kernel 6.7.0 - 6.12.58linux

Linux/Linux < 6.1

Linux/Linux 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 - 07105e61882ff4a7d58db63cc5f9e90c6c60506c

Linux/Linux 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 - 4c8a4f1d34eced168cc0b3a3dfe7b6dcc2090f69

Linux/Linux 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 - cb30dfa75d55eced379a42fd67bd5fb7ec38555e

Linux/Linux 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 - dbf316fc90aa954dcd5440817f4b944627ed63e0

Linux/Linux 58ccf0190d19d9a8a41f8a02b9e06742b58df4a1 - de7f2c67ceb1941b05b04ac35458a03e93cc57b1

... and 6 more

Published Dec 08, 2025

Tracked Since Feb 18, 2026