CVE-2026-47331: CWE-416 Use After Free in Canonical Ubuntu Linux
Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An unprivileged local user could trigger the race condition that can lead to a use-after-free (UAF) and, theoretically, arbitrary code execution.
AI Analysis
Technical Summary
Ubuntu Linux version 6.8 includes AppArmor SAUCE patches that do not acquire a necessary lock when modifying a linked list, causing a race condition. This race condition can lead to a use-after-free (CWE-416) vulnerability exploitable by an unprivileged local user. The vulnerability could allow an attacker to execute arbitrary code with elevated privileges. The CVSS 3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. No official remediation or patch has been published yet by Canonical.
Potential Impact
An unprivileged local user could exploit this vulnerability to cause a use-after-free condition, potentially leading to arbitrary code execution. This could compromise system confidentiality, integrity, and availability. However, no known exploits are currently reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider restricting local user access and monitoring for suspicious activity related to AppArmor modifications. Avoid running untrusted code locally.
CVE-2026-47331: CWE-416 Use After Free in Canonical Ubuntu Linux
Description
Ubuntu Linux 6.8 contains AppArmor SAUCE patches which fail to acquire a lock when modifying a linked list. An unprivileged local user could trigger the race condition that can lead to a use-after-free (UAF) and, theoretically, arbitrary code execution.
CVSS v3.1
Score 7.8high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Ubuntu Linux version 6.8 includes AppArmor SAUCE patches that do not acquire a necessary lock when modifying a linked list, causing a race condition. This race condition can lead to a use-after-free (CWE-416) vulnerability exploitable by an unprivileged local user. The vulnerability could allow an attacker to execute arbitrary code with elevated privileges. The CVSS 3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. No official remediation or patch has been published yet by Canonical.
Potential Impact
An unprivileged local user could exploit this vulnerability to cause a use-after-free condition, potentially leading to arbitrary code execution. This could compromise system confidentiality, integrity, and availability. However, no known exploits are currently reported in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is released, consider restricting local user access and monitoring for suspicious activity related to AppArmor modifications. Avoid running untrusted code locally.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- canonical
- Date Reserved
- 2026-05-19T10:37:36.433Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a188e08e29bf47b501d6820
Added to database: 5/28/2026, 6:48:40 PM
Last enriched: 5/28/2026, 7:03:48 PM
Last updated: 5/29/2026, 8:19:52 AM
Views: 10
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