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CVE-2026-47334— Deadlock or kernel panic in Ubuntu Linux AppArmor notification handling

Quick assessment

Affected
Canonical Ubuntu Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

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，该漏洞源于持有自旋锁时错误睡眠，可能导致内核恐慌或死锁。

CVSS 5.5 · Medium EPSS 0.08% · P0

Affected Version Matrix 3

VendorProduct Version RangeStatus
Canonical Ubuntu Linux 6.8.0< 6.8.0-124.124 affected
6.17.0< 6.17.0-35.35 affected
7.0.0< 7.0.0-22.22 affected
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I. Basic Information for CVE-2026-47334

Vulnerability Information
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Vulnerability Title
Deadlock or kernel panic in Ubuntu Linux AppArmor notification handling
Source: CVE Program / CVE List V5
Vulnerability Description
Ubuntu Linux 6.8, 6.17 and 7.0 contain AppArmor SAUCE patches which incorrectly sleep while holding a spinlock in notification handling code. The bug can be triggered by an unprivileged local user and can result in kernel panic or deadlock.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
死锁
Source: CVE Program / CVE List V5
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，该漏洞源于持有自旋锁时错误睡眠，可能导致内核恐慌或死锁。
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

Vendor Product Affected Versions CPE Subscribe
Canonical Ubuntu Linux 6.8.0 ~ 6.8.0-124.124 -

II. Public POCs for CVE-2026-47334

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III. Intelligence Information for CVE-2026-47334

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Patches & Fixes for CVE-2026-47334 (1)

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

CVE-2026-49238 8.4 HIGH SFTP Server VM Escape in Canonical Multipass
CVE-2026-49237 7.8 HIGH Local Privilege Escalation in Canonical Multipass
CVE-2026-47331 7.8 HIGH Use-after-free in Ubuntu Linux AppArmor notification handling
CVE-2026-47333 7.8 HIGH Out-of-bounds read in Ubuntu Linux AppArmor notification handling
CVE-2026-47328 6.1 MEDIUM Invalid pointer deallocation in Ubuntu Linux AppArmor notification handling
CVE-2026-47332 5.5 MEDIUM Out-of-bounds read in Ubuntu Linux AppArmor notification handling
CVE-2026-47326 5.5 MEDIUM Memory leak in Ubuntu Linux AppArmor large notification response allocation
CVE-2026-47335 5.5 MEDIUM NULL pointer dereference in Ubuntu Linux AppArmor notification handling
CVE-2026-47336 3.3 LOW Use of uninitialized value in Ubuntu Linux AppArmor IPv4/IPv6 socket mediation rules
CVE-2026-47327 3.3 LOW NULL pointer dereference in Ubuntu Linux AppArmor notification handling
CVE-2026-47337 3.3 LOW NULL pointer dereference in Ubuntu Linux AppArmor IPv4/IPv6 socket mediation
CVE-2026-47330 3.3 LOW Use of uninitialized value in Ubuntu Linux AppArmor notification handling
CVE-2026-47329 3.3 LOW Incorrect validation of field size in Ubuntu Linux AppArmor notification responses

IV. Related Vulnerabilities

Same product: Ubuntu Linux
Same vendor: Canonical
Same weakness: CWE-833

V. Comments for CVE-2026-47334

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