CVE-2025-68378
Unknown Unknown - Not Provided

Out-of-Bounds Write in Linux Kernel BPF Stackmap Overflow

Publication date: 2025-12-24

Last updated on: 2025-12-24

Assigner: kernel.org

Description
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix stackmap overflow check in __bpf_get_stackid() Syzkaller reported a KASAN slab-out-of-bounds write in __bpf_get_stackid() when copying stack trace data. The issue occurs when the perf trace contains more stack entries than the stack map bucket can hold, leading to an out-of-bounds write in the bucket's data array.

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Meta Information

Published
2025-12-24
Last Modified
2025-12-24
Generated
2026-07-06
AI Q&A
2025-12-24
EPSS Evaluated
2026-07-05
NVD
CVE-2025-68378
EUVD
EUVD-2025-205076

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

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Exploitability

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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability is a flaw in the Linux kernel's BPF subsystem, specifically in the __bpf_get_stackid() function. It occurs when the perf trace contains more stack entries than the stack map bucket can hold, causing an out-of-bounds write in the bucket's data array. This was identified as a KASAN slab-out-of-bounds write issue reported by Syzkaller.

Impact Analysis

The vulnerability can lead to memory corruption due to an out-of-bounds write in the kernel's stack map data structure. This could potentially cause system instability, crashes, or be exploited to execute arbitrary code with kernel privileges.

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