What’s Vulnerable › Vulnerabilities

CVE-2025-68321: page_pool: always add GFP_NOWARN for ATOMIC allocations

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-12-16 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: page_pool: always add GFP_NOWARN for ATOMIC allocations Driver authors often forget to add GFP_NOWARN for page allocation from the datapath. This is annoying to users as OOMs are a fact of life, and we pretty much expect network Rx to hit page allocation failures during OOM. Make page pool add GFP_NOWARN for ATOMIC allocations by default.

Affected products

• Linux: 4.18 — fixed in 6.18

How to fix

Upgrade to a fixed version: Linux 6.18. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0ec2cd5c58793d0c622797cd5fbe26634b357210
• https://git.kernel.org/stable/c/3671a0775952026228ae44e096eb144bca75f8dc
• https://git.kernel.org/stable/c/3c4c2c96d00d112626736cc865b3c75aa8fb6de3
• https://git.kernel.org/stable/c/7613c06ffa89c1e2266fb532e23ef7dfdf269d73
• https://git.kernel.org/stable/c/9835a0fd59a1df5ec0740fdab6d50db68e0f10de
• https://git.kernel.org/stable/c/ab48dc0e23eb714b3f233f8e8f6deed7df2051f5
• https://git.kernel.org/stable/c/f3b52167a0cb23b27414452fbc1278da2ee884fc

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