ZDI-26-1002: Linux Kernel Net Scheduler Qdisc Improper Validation of Array Index Local Privilege Escalation Vulnerability
Source Zero Day Initiative
Not known to be exploited · fixed in f99de42f5c6f8d088063817dad82c3334e87c570 : patch Linux kernel soon.
Data as of 13 Nov 2026, 22:36 UTC
Rated High by Zero Day Initiative · CVSS not yet scored by NVD
- Patch
- Available – fixed in f99de42f5c6f8d088063817dad82c3334e87c570, ea4d4b5dddb5121e64f56fd8e0720bd8b447b63d, c6ec35c8267c84c2094cb485db20c06384fc2bcc +1
Exploitation evidence
Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 13 Nov 2026.
What to do
Upgrade Linux kernel to f99de42f5c6f8d088063817dad82c3334e87c570, ea4d4b5dddb5121e64f56fd8e0720bd8b447b63d, c6ec35c8267c84c2094cb485db20c06384fc2bcc or 2f581814e4e3ea6a5e98f49813dc4c68444a0c4a.
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
|
| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in
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| LinuxLinux | Affected
| Fixed in– |
Description
A local privilege escalation vulnerability exists in the Linux Kernel Net Scheduler Qdisc due to improper validation of an array index. Exploitation requires prior ability to execute low-privileged code on the affected system. The vulnerability has a high severity rating assigned by ZDI and is tracked as CVE-2026-98797.