ZDI-21-503: Linux Kernel eBPF Improper Input Validation Privilege Escalation Vulnerability
This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of eBPF programs. The issue results from the lack of proper validation of user-supplied eBPF programs prior to executing them. An attacker can leverage this vulnerability to escalate privileges and execute arbitrary code in the context of the kernel.
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Red Hat Kernel-devel |
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Reference Links
Frequently Asked Questions
What is the severity of ZDI-21-503?
The severity of ZDI-21-503 is classified as high due to its potential to allow privilege escalation.
How do I fix ZDI-21-503?
To fix ZDI-21-503, update the Linux Kernel to the latest patched version.
Who is affected by ZDI-21-503?
ZDI-21-503 affects installations of the Linux Kernel that are vulnerable to local privilege escalation.
What type of systems are vulnerable to ZDI-21-503?
Systems running vulnerable versions of the Linux Kernel are at risk from ZDI-21-503.
Can ZDI-21-503 be exploited remotely?
No, ZDI-21-503 requires local access to the system to exploit the vulnerability.
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- canonical/red hat kernel-devel