CVE-2026-47326 - Vulnerability Details - OpenCVE

Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a memory leak in the handling of big responses to AppArmor notifications. The bug can be triggered by an unprivileged local user. The memory leak could lead to resource exhaustion.

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploitation none

Automatable no

Technical Impact partial

Vendors	Products
Canonical	Ubuntu Linux

No data.

No data.

References

Link	Providers
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/noble/commit/?id=8d858ecb7e2e216ca2987302a04c266f2355fefe

History

Thu, 28 May 2026 22:15:00 +0000

Type	Values Removed	Values Added
First Time appeared		Canonical Canonical ubuntu Linux
Vendors & Products		Canonical Canonical ubuntu Linux

Thu, 28 May 2026 20:30:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Thu, 28 May 2026 19:00:00 +0000

Type	Values Removed	Values Added
Description		Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a memory leak in the handling of big responses to AppArmor notifications. The bug can be triggered by an unprivileged local user. The memory leak could lead to resource exhaustion.
Title		Memory leak in Ubuntu Linux AppArmor large notification response allocation
Weaknesses		CWE-401
References		https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/noble/commit/?id=8d858ecb7e2e216ca2987302a04c266f2355fefe
Metrics		cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}`

MITRE

Status: PUBLISHED

Assigner: canonical

Published: 2026-05-28T18:26:58.224Z

Updated: 2026-05-28T19:25:40.402Z

Reserved: 2026-05-19T10:37:36.433Z

Link: CVE-2026-47326

Vulnrichment

Updated: 2026-05-28T19:25:35.859Z

NVD

Status : Awaiting Analysis

Published: 2026-05-28T19:16:40.110

Modified: 2026-05-29T02:45:36.283

Link: CVE-2026-47326

Redhat

No data.

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-47326", "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "state": "PUBLISHED", "assignerShortName": "canonical", "dateReserved": "2026-05-19T10:37:36.433Z", "datePublished": "2026-05-28T18:26:58.224Z", "dateUpdated": "2026-05-28T19:25:40.402Z"}, "containers": {"cna": {"title": "Memory leak in Ubuntu Linux AppArmor large notification response allocation", "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-401", "description": "CWE-401 Missing release of memory after effective lifetime", "type": "CWE"}]}], "affected": [{"vendor": "Canonical", "product": "Ubuntu Linux", "collectionURL": "https://launchpad.net/ubuntu/+source/", "packageName": "linux", "repo": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/", "modules": ["AppArmor"], "versions": [{"status": "affected", "version": "6.8.0", "lessThan": "6.8.0-124.124", "versionType": "dpkg"}, {"status": "affected", "version": "6.17.0", "lessThan": "6.17.0-35.35", "versionType": "dpkg"}, {"status": "affected", "version": "7.0.0", "lessThan": "7.0.0-22.22", "versionType": "dpkg"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a memory leak in the handling of big responses to AppArmor notifications. The bug can be triggered by an unprivileged local user. The memory leak could lead to resource exhaustion."}], "references": [{"url": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/noble/commit/?id=8d858ecb7e2e216ca2987302a04c266f2355fefe", "tags": ["patch"]}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "LOCAL", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "HIGH", "baseSeverity": "MEDIUM", "baseScore": 5.5, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}}], "credits": [{"lang": "en", "value": "Tristan Madani (@TristanInSec), Talence Security", "type": "finder"}], "source": {"discovery": "EXTERNAL"}, "providerMetadata": {"orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "shortName": "canonical", "dateUpdated": "2026-05-28T18:26:58.224Z"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-05-28T19:20:50.758806Z", "id": "CVE-2026-47326", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-28T19:25:40.402Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2026-47326", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-28T19:20:50.758806Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-05-28T19:25:35.859Z"}}], "cna": {"title": "Memory leak in Ubuntu Linux AppArmor large notification response allocation", "source": {"discovery": "EXTERNAL"}, "credits": [{"lang": "en", "type": "finder", "value": "Tristan Madani (@TristanInSec), Talence Security"}], "metrics": [{"format": "CVSS", "cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}, "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "affected": [{"repo": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/", "vendor": "Canonical", "modules": ["AppArmor"], "product": "Ubuntu Linux", "versions": [{"status": "affected", "version": "6.8.0", "lessThan": "6.8.0-124.124", "versionType": "dpkg"}, {"status": "affected", "version": "6.17.0", "lessThan": "6.17.0-35.35", "versionType": "dpkg"}, {"status": "affected", "version": "7.0.0", "lessThan": "7.0.0-22.22", "versionType": "dpkg"}], "packageName": "linux", "collectionURL": "https://launchpad.net/ubuntu/+source/", "defaultStatus": "unaffected"}], "references": [{"url": "https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/noble/commit/?id=8d858ecb7e2e216ca2987302a04c266f2355fefe", "tags": ["patch"]}], "descriptions": [{"lang": "en", "value": "Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a memory leak in the handling of big responses to AppArmor notifications. The bug can be triggered by an unprivileged local user. The memory leak could lead to resource exhaustion."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-401", "description": "CWE-401 Missing release of memory after effective lifetime"}]}], "providerMetadata": {"orgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "shortName": "canonical", "dateUpdated": "2026-05-28T18:26:58.224Z"}}}, "cveMetadata": {"cveId": "CVE-2026-47326", "state": "PUBLISHED", "dateUpdated": "2026-05-28T19:25:40.402Z", "dateReserved": "2026-05-19T10:37:36.433Z", "assignerOrgId": "cc1ad9ee-3454-478d-9317-d3e869d708bc", "datePublished": "2026-05-28T18:26:58.224Z", "assignerShortName": "canonical"}, "dataVersion": "5.2"}