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CVE-2026-98816

kernel: bpf: Fix overflow of jump offset in constant blinding

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Severity

Moderate

Red Hat Product Security

4.1

CVSS 3.1

Review impact separately from score.

Published · October 18, 2026

Updated · October 24, 2026

Description

A flaw was found in the Linux kernel's BPF (Berkeley Packet Filter) subsystem. An integer overflow occurs in the constant blinding mechanism when calculating backward jump offsets during BPF program hardening. A local attacker capable of loading BPF programs could exploit this issue to jump beyond program boundaries, causing a kernel crash and resulting in a Denial of Service (DoS).

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 4.1
CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:N/A:H

CWE-191 · Integer Underflow (Wrap or Wraparound)