CVE-2025-38257 - IBM s390 Memory Corruption Vulnerability

CVE-2025-38257 - IBM s390 Memory Corruption Vulnerability

https://cvefeed.io/rssfeed/latest.atom / Wed, 07/09/2025 - 17:29
CVE ID : CVE-2025-38257
Published : July 9, 2025, 11:15 a.m. | 3 hours, 33 minutes ago
Description : 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).
Severity: 0.0 | NA
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