bpf interpreter

About this tag
The bpf interpreter tag on WindowsForum.com covers discussions about the Linux kernel's BPF (Berkeley Packet Filter) interpreter, particularly focusing on security vulnerabilities and correctness issues. Recent content highlights CVE-2026-31525, a math bug in the BPF interpreter's handling of signed 32-bit division and modulo operations. The flaw involves the abs() macro being undefined for S32_MIN, leading to potential out-of-bounds map value access. The fix introduces a safe abs_s32() helper. This tag is relevant for kernel developers, security researchers, and IT professionals interested in Linux kernel internals, vulnerability analysis, and patch management.

  1. CVE-2026-31525: Fix abs() S32_MIN math bug in Linux BPF interpreter

    In the Linux kernel, CVE-2026-31525 has exposed a subtle but serious correctness flaw in the BPF interpreter’s signed 32-bit division and modulo paths. The issue is not a classic memory corruption bug; it is a math bug with security consequences, triggered when the interpreter handles S32_MIN...
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    • bpf interpreter cve-2026-31525 ebpf security linux kernel
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    • Forum: Security Alerts