kernel: kernel: Privilege escalation via binderfs use-after-free (CVE-2026-98776)

Overview

A flaw was found in the Linux kernel's Android Binder filesystem (binderfs). A local user can exploit a race condition during concurrent device creation and deletion to trigger a use-after-free (UAF) condition, which occurs when freed memory is written to while being re-registered. This issue may allow an attacker to achieve local privilege escalation or cause system memory corruption resulting in a Denial of Service (DoS).

Vendor advisories

• Red Hat VEX · Moderate · affected: Red Hat Enterprise Linux 10 · no fix planned: Red Hat Enterprise Linux 10 · updated 2026-10-21 · vex

kernel: kernel: Privilege escalation via binderfs use-after-free — rated Moderate by Red Hat. Released 2026-10-18, updated 2026-10-21.

Affected:

• Red Hat Enterprise Linux 10

No fix planned:

• Red Hat Enterprise Linux 10

Remediation

Fix deferred

Workarounds / mitigations:

• Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.