Use‑After‑Free in Linux Kernel Logitech HIDPP Protocol (CVE‑2026‑93826) Enables Local Privilege Escalation
What It Is — A use‑after‑free flaw in the Linux kernel’s handling of Logitech HIDPP (Human Interface Device Protocol) connect events allows a local attacker who already has low‑privileged code execution to gain kernel‑level privileges and run arbitrary code. The vulnerability (CVE‑2026‑93826) scores 7.8 CVSS (AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H). Linux has published a patch (see commit 6df6b1f2) that corrects the missing object‑existence validation. No public exploits have been observed, but the flaw is exploitable on any kernel version containing the vulnerable code.
Affected Products — Linux kernel (all distributions shipping the vulnerable code).
Why It Matters for Trust & Control Assurance — This flaw tests the control objective of privileged access management: ensuring that escalation paths are tightly controlled and that patches are applied promptly. Capability focus: ACCESS_CONTROLS (maps to NIST CSF 2.0 “Protect” function).
Recommended Actions —
- Deploy the Linux kernel update that resolves CVE‑2026‑93826 across all systems.
- Verify kernel versions on inventory to confirm remediation.
- Integrate the patch into your continuous patch‑management workflow and retain evidence of compliance.
Source: Zero Day Initiative advisory