Horizon Alert
Summary of the vulnerability and why it matters
The Linux kernel contains a flaw in its futex_requeue function. This weakness allows local users to execute commands with elevated privileges. Such an event could lead to unauthorized system access and potential data compromise.
- Vulnerable component: Linux kernel futex_requeue function
- Core weakness: Unsafe waiter modification
- Main business impact: Privilege escalation
Attack Path
How an attacker could exploit the issue
A local user can gain privileges by exploiting a flaw in the Linux kernel's futex_requeue function. This function does not properly validate futex addresses, enabling an attacker to manipulate waiting processes. This manipulation can lead to unauthorized privilege escalation on the affected system.
- Local user access required.
- Malicious FUTEX_REQUEUE command.
- Unsafe waiter modification.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability allows local users to gain elevated privileges on a system by exploiting a flaw in the Linux kernel's futex_requeue function. An attacker with existing local access could use a specially crafted command to modify system processes, potentially leading to unauthorized control. The risk to an organization arises from the possibility of a compromised user account escalating its permissions.
- Attacker needs local access.
- Difficult exploit requires technical skill.
- Business risk is elevated privileges.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
This vulnerability in the Linux kernel could allow local users to gain elevated privileges. The exploit involves a specific function that does not properly validate futex addresses. Affected systems are those running vulnerable versions of the Linux kernel.
- Identify systems running vulnerable Linux kernel versions.
- Isolate or restrict access to affected systems.
- Apply vendor patches and validate the fix.
- Monitor for unusual activity.
