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Vulnerability Details :

CVE-2026-47328

Summary
Assigner-canonical
Assigner Org ID-cc1ad9ee-3454-478d-9317-d3e869d708bc
Published At-28 May, 2026 | 18:27
Updated At-28 May, 2026 | 19:25
Rejected At-
Credits

Invalid pointer deallocation in Ubuntu Linux AppArmor notification handling

Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly attempt to free a pointer which was not previously kmalloc()d, while at the same time leaking allocated memory. The bug can be triggered by an unprivileged local user and can result in the corruption of slab metadata and could lead to resource exhaustion.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:canonical
Assigner Org ID:cc1ad9ee-3454-478d-9317-d3e869d708bc
Published At:28 May, 2026 | 18:27
Updated At:28 May, 2026 | 19:25
Rejected At:
▼CVE Numbering Authority (CNA)
Invalid pointer deallocation in Ubuntu Linux AppArmor notification handling

Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly attempt to free a pointer which was not previously kmalloc()d, while at the same time leaking allocated memory. The bug can be triggered by an unprivileged local user and can result in the corruption of slab metadata and could lead to resource exhaustion.

Affected Products
Vendor
Canonical Ltd.Canonical
Product
Ubuntu Linux
Collection URL
https://launchpad.net/ubuntu/+source/
Package Name
linux
Repo
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/
Modules
  • AppArmor
Default Status
unaffected
Versions
Affected
  • From 6.8.0 before 6.8.0-124.124 (dpkg)
  • From 6.17.0 before 6.17.0-35.35 (dpkg)
  • From 7.0.0 before 7.0.0-22.22 (dpkg)
Problem Types
TypeCWE IDDescription
CWECWE-590CWE-590 Free of memory not on the heap
Type: CWE
CWE ID: CWE-590
Description: CWE-590 Free of memory not on the heap
Metrics
VersionBase scoreBase severityVector
3.16.1MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
Version: 3.1
Base score: 6.1
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
finder
Tristan Madani (@TristanInSec), Talence Security
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/noble/commit/?id=7f3c4902c39432ce7ea0d384cb70eba282247fac
patch
Hyperlink: https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/noble/commit/?id=7f3c4902c39432ce7ea0d384cb70eba282247fac
Resource:
patch
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:security@ubuntu.com
Published At:28 May, 2026 | 19:16
Updated At:09 Jun, 2026 | 16:33

Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly attempt to free a pointer which was not previously kmalloc()d, while at the same time leaking allocated memory. The bug can be triggered by an unprivileged local user and can result in the corruption of slab metadata and could lead to resource exhaustion.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary3.16.1MEDIUM
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
Type: Secondary
Version: 3.1
Base score: 6.1
Base severity: MEDIUM
Vector:
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
CPE Matches
Canonical Ltd.
canonical
>>ubuntu_linux>>24.04
cpe:2.3:o:canonical:ubuntu_linux:24.04:*:*:*:*:*:*:*
Canonical Ltd.
canonical
>>ubuntu_linux>>25.10
cpe:2.3:o:canonical:ubuntu_linux:25.10:*:*:*:*:*:*:*
Canonical Ltd.
canonical
>>ubuntu_linux>>26.04
cpe:2.3:o:canonical:ubuntu_linux:26.04:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-590Secondarysecurity@ubuntu.com
CWE ID: CWE-590
Type: Secondary
Source: security@ubuntu.com
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/noble/commit/?id=7f3c4902c39432ce7ea0d384cb70eba282247facsecurity@ubuntu.com
Patch
Hyperlink: https://git.launchpad.net/~ubuntu-kernel/ubuntu/+source/linux/+git/noble/commit/?id=7f3c4902c39432ce7ea0d384cb70eba282247fac
Source: security@ubuntu.com
Resource:
Patch

Change History

0
Information is not available yet

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Updated-26 Dec, 2024 | 19:21
Rejected-Not Available
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Action-Not Available
Vendor-NVIDIA CorporationCanonical Ltd.
Product-jetpack_software_development_kitcv-cudaubuntu_linuxNVIDIA CV-CUDA
CWE ID-CWE-400
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Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
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KEV Action Due Date-Not Available
Free of static data in accountsservice

Ubuntu-specific modifications to accountsservice (in patch file debian/patches/0010-set-language.patch) caused the fallback_locale variable, pointing to static storage, to be freed, in the user_change_language_authorized_cb function. This is reachable via the SetLanguage dbus function. This is fixed in versions 0.6.55-0ubuntu12~20.04.5, 0.6.55-0ubuntu13.3, 0.6.55-0ubuntu14.1.

Action-Not Available
Vendor-Canonical Ltd.Ubuntu
Product-ubuntu_linuxaccountsserviceaccountsservice
CWE ID-CWE-590
Free of Memory not on the Heap
CWE ID-CWE-763
Release of Invalid Pointer or Reference
Details not found