CVE-2026-47333: CWE-125 Out-of-bounds read in Canonical Ubuntu Linux
CVE-2026-47333 is a high-severity vulnerability in Ubuntu Linux versions 6.8.0, 6.17.0, and 7.0.0 involving an out-of-bounds read in the AppArmor notification handling code. The issue arises from incorrect computation of an internal buffer size due to AppArmor SAUCE patches, allowing an unprivileged local user to trigger a heap memory out-of-bounds read. This can cause invalid data to be processed by the AppArmor DFA policy engine, potentially impacting confidentiality, integrity, and availability. No official patch or remediation guidance is currently provided by Canonical.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-47333) affects Canonical's 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 out-of-bounds read during notification handling. An unprivileged local user can trigger this flaw, which results in the AppArmor DFA policy engine processing invalid data. The CVSS 3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. No vendor advisory or patch links are currently available, and the remediation level is unspecified.
Potential Impact
Successful exploitation allows an unprivileged local user to cause a heap out-of-bounds read in AppArmor's notification handling code, potentially leading to processing of invalid data by the policy engine. This can compromise confidentiality, integrity, and availability of the affected system components. There are no reported exploits in the wild, and the vulnerability requires local access with low complexity.
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 at this time, users should monitor Canonical's security advisories for updates. 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
CVE-2026-47333 is a high-severity vulnerability in Ubuntu Linux versions 6.8.0, 6.17.0, and 7.0.0 involving an out-of-bounds read in the AppArmor notification handling code. The issue arises from incorrect computation of an internal buffer size due to AppArmor SAUCE patches, allowing an unprivileged local user to trigger a heap memory out-of-bounds read. This can cause invalid data to be processed by the AppArmor DFA policy engine, potentially impacting confidentiality, integrity, and availability. No official patch or remediation guidance is currently provided by Canonical.
CVSS v3.1
Score 7.8high
Affected software
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-47333) affects Canonical's 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 out-of-bounds read during notification handling. An unprivileged local user can trigger this flaw, which results in the AppArmor DFA policy engine processing invalid data. The CVSS 3.1 base score is 7.8, reflecting high impact on confidentiality, integrity, and availability. No vendor advisory or patch links are currently available, and the remediation level is unspecified.
Potential Impact
Successful exploitation allows an unprivileged local user to cause a heap out-of-bounds read in AppArmor's notification handling code, potentially leading to processing of invalid data by the policy engine. This can compromise confidentiality, integrity, and availability of the affected system components. There are no reported exploits in the wild, and the vulnerability requires local access with low complexity.
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 at this time, users should monitor Canonical's security advisories for updates. 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: 05/28/2026, 18:48:40 UTC
Last enriched: 06/04/2026, 20:59:32 UTC
Last updated: 07/31/2026, 19:22:59 UTC
Views: 47
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