Bug 2492275 (CVE-2026-53031)

Summary: CVE-2026-53031 kernel: bpf: Validate node_id in arena_alloc_pages()
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: unspecifiedCC: rhel-process-autobot, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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A flaw was found in the Linux kernel. The `arena_alloc_pages()` function within the Berkeley Packet Filter (BPF) subsystem does not properly validate the `node_id` parameter. A local attacker could exploit this vulnerability by supplying an invalid `node_id`, which is then used without bounds checking during memory allocation. This could lead to memory corruption, potentially resulting in a denial of service or other system instability.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Description OSIDB Bzimport 2026-06-24 18:02:23 UTC 
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().
Comment 1 Mauro Matteo Cascella 2026-06-25 14:12:58 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062454-CVE-2026-53031-d9fe@gregkh/T