ZDI-26-570: Linux Kernel IGMP Subsystem Race Condition Local 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 high-privileged code on the target system in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.5.
AI Analysis
Technical Summary
This vulnerability in the Linux Kernel IGMP subsystem is a race condition caused by improper locking when handling general-query timers. It allows local attackers who already have the ability to execute high-privileged code to escalate their privileges and execute arbitrary code within the kernel context. The vulnerability has a CVSS score of 7.5, indicating high severity. Linux has released a patch to fix this issue, as referenced in the official commit at https://github.com/torvalds/linux/commit/7b19c0f81ed1fdaec6bc522569be367199a9edf3.
Potential Impact
Local attackers with high-privileged code execution capabilities can exploit this race condition to escalate privileges and execute arbitrary code in kernel context, potentially compromising system integrity and control.
Mitigation Recommendations
Linux has issued an official update to correct this vulnerability. Users and administrators should apply the provided patch from the Linux kernel repository to remediate this issue. No additional mitigation is required beyond applying the official fix.
ZDI-26-570: Linux Kernel IGMP Subsystem Race Condition Local Privilege Escalation Vulnerability
Description
This vulnerability allows local attackers to escalate privileges on affected installations of Linux Kernel. An attacker must first obtain the ability to execute high-privileged code on the target system in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.5.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in the Linux Kernel IGMP subsystem is a race condition caused by improper locking when handling general-query timers. It allows local attackers who already have the ability to execute high-privileged code to escalate their privileges and execute arbitrary code within the kernel context. The vulnerability has a CVSS score of 7.5, indicating high severity. Linux has released a patch to fix this issue, as referenced in the official commit at https://github.com/torvalds/linux/commit/7b19c0f81ed1fdaec6bc522569be367199a9edf3.
Potential Impact
Local attackers with high-privileged code execution capabilities can exploit this race condition to escalate privileges and execute arbitrary code in kernel context, potentially compromising system integrity and control.
Mitigation Recommendations
Linux has issued an official update to correct this vulnerability. Users and administrators should apply the provided patch from the Linux kernel repository to remediate this issue. No additional mitigation is required beyond applying the official fix.
Technical Details
- Classification
- {"confidence":0.95,"severitySource":"cvss-text","classifier":"rss-v2"}
- Article Source
- {"url":"http://www.zerodayinitiative.com/advisories/ZDI-26-570/","fetched":true,"fetchedAt":"2026-08-13T20:40:22.703Z","wordCount":199}
Threat ID: 6a7e2cfbbf8831d539c73d23
Added to database: 08/13/2026, 20:45:47 UTC
Last enriched: 08/13/2026, 20:48:08 UTC
Last updated: 09/24/2026, 11:12:22 UTC
Views: 61
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