What’s Vulnerable › Vulnerabilities

CVE-2025-68378: bpf: Fix stackmap overflow check in __bpf_get_stackid()

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-24 · updated 2026-10-30

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.

Affected products

• Linux: from 5.10.110 before 5.11; from 5.15.33 before 5.16; from 5.16.19 before 5.17; from 5.17.2 before 5.18 — fixed in 5.11, 5.16, 5.17, 5.18

How to fix

Upgrade to a fixed version: Linux 5.11, 5.16, 5.17, 5.18. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/03fe4c886667b3a09b9d6afc03bbc68afb35c82b
• https://git.kernel.org/stable/c/23f852daa4bab4d579110e034e4d513f7d490846
• https://git.kernel.org/stable/c/2a008f6de163279deffd488c1deab081bce5667c
• https://git.kernel.org/stable/c/4669a8db976c8cbd5427fe9945f12c5fa5168ff3
• https://git.kernel.org/stable/c/d1f424a77b6bd27b361737ed73df49a0158f1590
• https://git.kernel.org/stable/c/d6028caa0ee39dccd005468adfa3223b92bd3ad3

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