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CVE-2026-47337— NULL pointer dereference in Ubuntu Linux AppArmor IPv4/IPv6 socket mediation

CVSS 3.3 · Low EPSS 0.01% · P2

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-2026-47337

Vulnerability Information
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Vulnerability Title
NULL pointer dereference in Ubuntu Linux AppArmor IPv4/IPv6 socket mediation
Source: NVD (National Vulnerability Database)
Vulnerability Description
Ubuntu Linux 6.8, 6.17 and 7.0 contain SAUCE patches with a possible NULL pointer dereference in the handling of AF_INET/AF_INET6 socket mediation. The bug can be triggered by an unprivileged local user. This can lead to a kernel oops.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: NVD (National Vulnerability Database)
Vulnerability Type
空指针解引用
Source: NVD (National Vulnerability Database)
Vulnerability Title
Canonical Ubuntu Linux 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Canonical Ubuntu Linux是英国科能软件（Canonical）公司的一套Linux操作系统。 Canonical Ubuntu Linux 6.8版本、6.17版本和7.0版本存在安全漏洞，该漏洞源于处理AF_INET/AF_INET6套接字调解时可能存在空指针取消引用，可能导致内核崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
CanonicalUbuntu Linux 6.8.0 ~ 6.8.0-124.124 -

II. Public POCs for CVE-2026-47337

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III. Intelligence Information for CVE-2026-47337

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Patches & Fixes for CVE-2026-47337 (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-2026-473286.1 MEDIUMInvalid pointer deallocation 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-2026-473303.3 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-476

V. Comments for CVE-2026-47337

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