Linux kernel skb_zerocopy flaw allows local privilege escalation
Original title: ZDI-26-1006: Linux Kernel skbuff skb_zerocopy Improper Ownership Management Local Privilege Escalation Vulnerability
ZDI rates CVE-2026-99284 at CVSS 7.8; an attacker needs low-privileged code execution first.
ZDI published ZDI-26-1006, an improper ownership management flaw in Linux kernel skbuff skb_zerocopy. A local attacker who can already run low-privileged code can escalate privileges on affected installations. ZDI assigned CVE-2026-99284 and a CVSS rating of 7.8. No fixed version or exploitation status is stated.
- Assigned identifier is CVE-2026-99284.
- ZDI CVSS rating is 7.8.
- Exploitation requires prior low-privileged code execution.
- The advisory names the skb_zerocopy path in skbuff.
Impact: Local privilege escalation from low-privileged code
| Product | Affected |
|---|---|
| Linux Kernel | — |
- CVEs
- CVE-2026-99284
- Vendors
- Linux
- Products
- Linux Kernel
Vulnerabilities mentioned
All| CVE | Vulnerability | CVSS | EPSS | Signals | Published |
|---|---|---|---|---|---|
| CVE-2026-99284 | Local privilege escalation in Linux kernel skb_zerocopy | — | — |
From the original article
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 ZDI has assigned a CVSS rating of 7.
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