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CVE-2026-53031: bpf: Validate node_id in arena_alloc_pages()

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-24 · updated 2026-10-19
• Weakness: CWE-20

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Validate node_id in arena_alloc_pages() arena_alloc_pages() accepts a plain int node_id and forwards it through the entire allocation chain without any bounds checking. Validate node_id before passing it down the allocation chain in arena_alloc_pages().

Affected products

• Linux kernel: from 6.9 before 6.12.91; from 6.13 before 6.18.33; from 6.19 before 7.0.10 — fixed in 6.12.91, 6.18.33, 7.0.10

How to fix

Upgrade to a fixed version: Linux kernel 6.12.91, 6.18.33, 7.0.10. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2845989f2ebaf7848e4eccf9a779daf3156ea0a5
• https://git.kernel.org/stable/c/31d3b4b28e55835646d6829d60023f730dd34e85
• https://git.kernel.org/stable/c/e15900888c09480a4c632bc598f1c5bd39bed6d6
• https://git.kernel.org/stable/c/fb66e20130f95a93ffea1677252526a9e39170b2

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