IT

Tracker / CVE-2025-38257

CVE-2025-38257

High 7.3

In the Linux kernel, the following vulnerability has been resolved: s390/pkey: Prevent overflow in size calculation for memdup_user() Number of apqn target list entries contained in 'nr_apqns' variable is determined by userspace via an ioctl call so the result of the product in calculation of size passed to memdup_user() may overflow. In this case the actual size of the allocated area and the value describing it won't be in sync leading to various types of unpredictable behaviour later. Use a proper memdup_array_user() helper which returns an error if an overflow is detected. Note that it is different from when nr_apqns is initially zero - that case is considered valid and should be handled in subsequent pkey_handler implementations. Found by Linux Verification Center (linuxtesting.org).

Affected products and versions

debian debian_linux
linux linux_kernel
linux linux_kernel · 5.16 → 6.1.143
linux linux_kernel · 5.4 → 5.15.187
linux linux_kernel · 6.13 → 6.15.5
linux linux_kernel · 6.2 → 6.6.96
linux linux_kernel · 6.7 → 6.12.36

Analysis

This page is not indexable yet.Until it carries original analysis — what it actually exposes, how to check in two minutes whether a system was touched, what to do if it was — the page stays noindex. The database decides that, not the template.

References