ZDI-26-442: Linux Kernel CAN ISO-TP Protocol 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 low-privileged code on the target system in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.8.
AI Analysis
Technical Summary
This vulnerability in the Linux Kernel's CAN ISO-TP protocol involves a race condition due to lack of proper locking when closing sockets. An attacker who can execute low-privileged code locally can exploit this flaw to escalate privileges and execute arbitrary code within the kernel. The vulnerability has been assigned a CVSS score of 7.8, indicating high severity. Linux has released a patch to correct this issue, as detailed in the vendor's advisory and mailing list post.
Potential Impact
Local attackers with the ability to run low-privileged code can exploit this vulnerability to escalate privileges to kernel level, potentially gaining full control over the affected system. This can lead to arbitrary code execution with kernel privileges, compromising confidentiality, integrity, and availability of the system.
Mitigation Recommendations
Linux has issued an official update that corrects this vulnerability. Applying the vendor-provided patch or updating to the fixed kernel version is the recommended remediation. No additional mitigation steps are indicated beyond applying the official fix.
ZDI-26-442: Linux Kernel CAN ISO-TP Protocol 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 low-privileged code on the target system in order to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.8.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in the Linux Kernel's CAN ISO-TP protocol involves a race condition due to lack of proper locking when closing sockets. An attacker who can execute low-privileged code locally can exploit this flaw to escalate privileges and execute arbitrary code within the kernel. The vulnerability has been assigned a CVSS score of 7.8, indicating high severity. Linux has released a patch to correct this issue, as detailed in the vendor's advisory and mailing list post.
Potential Impact
Local attackers with the ability to run low-privileged code can exploit this vulnerability to escalate privileges to kernel level, potentially gaining full control over the affected system. This can lead to arbitrary code execution with kernel privileges, compromising confidentiality, integrity, and availability of the system.
Mitigation Recommendations
Linux has issued an official update that corrects this vulnerability. Applying the vendor-provided patch or updating to the fixed kernel version is the recommended remediation. No additional mitigation steps are indicated beyond applying the official fix.
Technical Details
- Article Source
- {"url":"http://www.zerodayinitiative.com/advisories/ZDI-26-442/","fetched":true,"fetchedAt":"2026-07-16T15:50:31.629Z","wordCount":202}
- Classification
- {"confidence":0.95,"severitySource":"cvss-text","classifier":"rss-v2"}
Threat ID: 6a58fe6468715ace43485b49
Added to database: 07/16/2026, 15:53:08 UTC
Last enriched: 08/07/2026, 06:02:21 UTC
Last updated: 08/27/2026, 14:37:53 UTC
Views: 96
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