IT

Tracker / CVE-2025-38424

CVE-2025-38424

High 7.8

In the Linux kernel, the following vulnerability has been resolved: perf: Fix sample vs do_exit() Baisheng Gao reported an ARM64 crash, which Mark decoded as being a synchronous external abort -- most likely due to trying to access MMIO in bad ways. The crash further shows perf trying to do a user stack sample while in exit_mmap()'s tlb_finish_mmu() -- i.e. while tearing down the address space it is trying to access. It turns out that we stop perf after we tear down the userspace mm; a receipie for disaster, since perf likes to access userspace for various reasons. Flip this order by moving up where we stop perf in do_exit(). Additionally, harden PERF_SAMPLE_CALLCHAIN and PERF_SAMPLE_STACK_USER to abort when the current task does not have an mm (exit_mm() makes sure to set current->mm = NULL; before commencing with the actual teardown). Such that CPU wide events don't trip on this same problem.

Affected products and versions

debian debian_linux
linux linux_kernel
linux linux_kernel · 3.7 → 5.4.295
linux linux_kernel · 5.11 → 5.15.186
linux linux_kernel · 5.16 → 6.1.142
linux linux_kernel · 5.5 → 5.10.239
linux linux_kernel · 6.13 → 6.15.4
linux linux_kernel · 6.2 → 6.6.95
linux linux_kernel · 6.7 → 6.12.35

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