ZDI-26-568: Linux Kernel Net Scheduler Race Condition Local Privilege Escalation Vulnerability
A race condition vulnerability in the Linux Kernel's network scheduler allows local attackers with high privileges to escalate their privileges further by exploiting improper locking in tcf_tunnel_key_params object handling. The vulnerability can lead to arbitrary code execution in kernel context. Linux has issued an update to address this issue.
AI Analysis
Technical Summary
This vulnerability, identified as ZDI-26-568, affects the Linux Kernel's network scheduler component. It arises from a race condition due to lack of proper locking when manipulating tcf_tunnel_key_params objects. Exploitation requires the attacker to already have the ability to execute high-privileged code locally. Successful exploitation enables privilege escalation and arbitrary code execution within the kernel context. The vulnerability has a CVSS score of 7.5, indicating high severity. Linux has released a patch to correct this flaw, as referenced in the official Linux kernel commit.
Potential Impact
Local attackers with existing high-privilege code execution capabilities can exploit this race condition to escalate privileges further and execute arbitrary code in kernel mode. This can compromise system integrity, confidentiality, and availability.
Mitigation Recommendations
Linux has issued an official update that addresses this vulnerability. Applying the vendor-provided patch from the referenced Linux kernel commit is the recommended remediation. Users should update their Linux Kernel to the fixed version as soon as possible to mitigate this risk.
ZDI-26-568: Linux Kernel Net Scheduler Race Condition Local Privilege Escalation Vulnerability
Description
A race condition vulnerability in the Linux Kernel's network scheduler allows local attackers with high privileges to escalate their privileges further by exploiting improper locking in tcf_tunnel_key_params object handling. The vulnerability can lead to arbitrary code execution in kernel context. Linux has issued an update to address this issue.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as ZDI-26-568, affects the Linux Kernel's network scheduler component. It arises from a race condition due to lack of proper locking when manipulating tcf_tunnel_key_params objects. Exploitation requires the attacker to already have the ability to execute high-privileged code locally. Successful exploitation enables privilege escalation and arbitrary code execution within the kernel context. The vulnerability has a CVSS score of 7.5, indicating high severity. Linux has released a patch to correct this flaw, as referenced in the official Linux kernel commit.
Potential Impact
Local attackers with existing high-privilege code execution capabilities can exploit this race condition to escalate privileges further and execute arbitrary code in kernel mode. This can compromise system integrity, confidentiality, and availability.
Mitigation Recommendations
Linux has issued an official update that addresses this vulnerability. Applying the vendor-provided patch from the referenced Linux kernel commit is the recommended remediation. Users should update their Linux Kernel to the fixed version as soon as possible to mitigate this risk.
Technical Details
- Classification
- {"confidence":0.95,"severitySource":"cvss-text","classifier":"rss-v2"}
- Article Source
- {"url":"http://www.zerodayinitiative.com/advisories/ZDI-26-568/","fetched":true,"fetchedAt":"2026-08-13T20:40:26.439Z","wordCount":201}
Threat ID: 6a7e2cfbbf8831d539c73d29
Added to database: 08/13/2026, 20:45:47 UTC
Last enriched: 08/13/2026, 20:48:23 UTC
Last updated: 08/13/2026, 20:51:23 UTC
Views: 4
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