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CVE-2026-47328— Invalid pointer deallocation in Ubuntu Linux AppArmor notification handling

CVSS 6.1 · Medium

Affected Version Matrix 3

VendorProductVersion RangeStatus
CanonicalUbuntu Linux6.8.0< 6.8.0-124.124affected
6.17.0< 6.17.0-35.35affected
7.0.0< 7.0.0-22.22affected
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I. Basic Information for CVE-2026-47328

Vulnerability Information
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Vulnerability Title
Invalid pointer deallocation in Ubuntu Linux AppArmor notification handling
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
释放并不在堆上的内存
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
CanonicalUbuntu Linux 6.8.0 ~ 6.8.0-124.124 -

II. Public POCs for CVE-2026-47328

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III. Intelligence Information for CVE-2026-47328

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Patches & Fixes for CVE-2026-47328 (1)

Same Patch Batch · Canonical · 2026-05-28 · 14 CVEs total

CVE-2026-492388.4 HIGHSFTP Server VM Escape in Canonical Multipass
CVE-2026-492377.8 HIGHLocal Privilege Escalation in Canonical Multipass
CVE-2026-473317.8 HIGHUse-after-free in Ubuntu Linux AppArmor notification handling
CVE-2026-473337.8 HIGHOut-of-bounds read in Ubuntu Linux AppArmor notification handling
CVE-2026-473325.5 MEDIUMOut-of-bounds read in Ubuntu Linux AppArmor notification handling
CVE-2026-473345.5 MEDIUMDeadlock or kernel panic in Ubuntu Linux AppArmor notification handling
CVE-2026-473265.5 MEDIUMMemory leak in Ubuntu Linux AppArmor large notification response allocation
CVE-2026-473355.5 MEDIUMNULL pointer dereference in Ubuntu Linux AppArmor notification handling
CVE-2026-473363.3 LOWUse of uninitialized value in Ubuntu Linux AppArmor IPv4/IPv6 socket mediation rules
CVE-2026-473273.3 LOWNULL pointer dereference in Ubuntu Linux AppArmor notification handling
CVE-2026-473373.3 LOWNULL pointer dereference in Ubuntu Linux AppArmor IPv4/IPv6 socket mediation
CVE-2026-473303.3 LOWUse of uninitialized value in Ubuntu Linux AppArmor notification handling
CVE-2026-473293.3 LOWIncorrect validation of field size in Ubuntu Linux AppArmor notification responses

IV. Related Vulnerabilities

Same product: Ubuntu Linux
Same vendor: Canonical
Same weakness: CWE-590

V. Comments for CVE-2026-47328

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