CVE-2026-47333: CWE-125 Out-of-bounds read in Canonical Ubuntu Linux
Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the size of an internal buffer, leading to a heap memory out-of-bounds read in notification handling code. The bug can be triggered by an unprivileged local user and can result in invalid data being processed by the AppArmor DFA policy engine.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-47333) affects Ubuntu Linux versions 6.8.0, 6.17.0, and 7.0.0. It is caused by AppArmor SAUCE patches that may incorrectly calculate the size of an internal buffer, leading to a heap memory out-of-bounds read during notification handling. This flaw can be triggered by an unprivileged local user and results in invalid data being processed by the AppArmor DFA policy engine. The vulnerability is classified under CWE-125 (Out-of-bounds Read) and has a CVSS 3.1 base score of 7.8, reflecting high impact on confidentiality, integrity, and availability. No vendor advisory or patch links are currently provided, and no known exploits have been reported.
Potential Impact
The vulnerability allows an unprivileged local user to cause a heap out-of-bounds read in the AppArmor notification handling code. This can lead to the processing of invalid data by the AppArmor DFA policy engine, potentially compromising system confidentiality, integrity, and availability. The CVSS score of 7.8 indicates a high impact if exploited. However, there are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official patch or remediation level is provided by Canonical, users should monitor for updates from the vendor. Until a fix is available, restricting local user access and minimizing exposure to untrusted local users may reduce risk.
CVE-2026-47333: CWE-125 Out-of-bounds read in Canonical Ubuntu Linux
Description
Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which can potentially incorrectly compute the size of an internal buffer, leading to a heap memory out-of-bounds read in notification handling code. The bug can be triggered by an unprivileged local user and can result in invalid data being processed by the AppArmor DFA policy engine.
CVSS v3.1
Score 7.8high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-47333) affects Ubuntu Linux versions 6.8.0, 6.17.0, and 7.0.0. It is caused by AppArmor SAUCE patches that may incorrectly calculate the size of an internal buffer, leading to a heap memory out-of-bounds read during notification handling. This flaw can be triggered by an unprivileged local user and results in invalid data being processed by the AppArmor DFA policy engine. The vulnerability is classified under CWE-125 (Out-of-bounds Read) and has a CVSS 3.1 base score of 7.8, reflecting high impact on confidentiality, integrity, and availability. No vendor advisory or patch links are currently provided, and no known exploits have been reported.
Potential Impact
The vulnerability allows an unprivileged local user to cause a heap out-of-bounds read in the AppArmor notification handling code. This can lead to the processing of invalid data by the AppArmor DFA policy engine, potentially compromising system confidentiality, integrity, and availability. The CVSS score of 7.8 indicates a high impact if exploited. However, there are no known exploits in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official patch or remediation level is provided by Canonical, users should monitor for updates from the vendor. Until a fix is available, restricting local user access and minimizing exposure to untrusted local users may reduce risk.
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: 6a188e08e29bf47b501d6826
Added to database: 5/28/2026, 6:48:40 PM
Last enriched: 5/28/2026, 7:03:42 PM
Last updated: 5/29/2026, 8:19:31 AM
Views: 21
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