IT

Tracker / CVE-2025-39902

CVE-2025-39902

High 7.1

In the Linux kernel, the following vulnerability has been resolved: mm/slub: avoid accessing metadata when pointer is invalid in object_err() object_err() reports details of an object for further debugging, such as the freelist pointer, redzone, etc. However, if the pointer is invalid, attempting to access object metadata can lead to a crash since it does not point to a valid object. One known path to the crash is when alloc_consistency_checks() determines the pointer to the allocated object is invalid because of a freelist corruption, and calls object_err() to report it. The debug code should report and handle the corruption gracefully and not crash in the process. In case the pointer is NULL or check_valid_pointer() returns false for the pointer, only print the pointer value and skip accessing metadata.

Affected products and versions

debian debian_linux
linux linux_kernel
linux linux_kernel · 2.6.22 → 5.4.299
linux linux_kernel · 5.11 → 5.15.192
linux linux_kernel · 5.16 → 6.1.151
linux linux_kernel · 5.5 → 5.10.243
linux linux_kernel · 6.13 → 6.16.6
linux linux_kernel · 6.2 → 6.6.105
linux linux_kernel · 6.7 → 6.12.46

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