CVE-2026-47337

Local kernel oops via uninitialized address pointer

Published May 28, 2026 · Updated May 28, 2026

NULL pointer dereference in AppArmor socket mediation in Ubuntu Linux 6.8, 6.17 and 7.0 allows local users to cause a kernel oops. In bind_map_addr, the AF_UNSPEC path dereferences addr4->sin_addr before addr4 is assigned from the caller-supplied socket address. Reachability requires an AppArmor profile that mediates AA_CLASS_NET; a crafted bind() call then forces a kernel oops without demonstrated data access or code execution.

CVSS severity3.3
Low
EPSS probability0.09%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NULL pointer dereference in AppArmor socket mediation in Ubuntu Linux 6.8, 6.17 and 7.0 allows local users to cause a kernel oops. In bind_map_addr, the AF_UNSPEC path dereferences addr4->sin_addr before addr4 is assigned from the caller-supplied socket address. Reachability requires an AppArmor profile that mediates AA_CLASS_NET; a crafted bind() call then forces a kernel oops without demonstrated data access or code execution.

The record

CVE
CVE-2026-47337
Published
May 28, 2026
Updated
May 28, 2026
Vendor
Canonical
Product
Ubuntu
Classifications
CWE-476, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 28, 2026CVE publishedPublication date reported by the CVE source.
  2. May 28, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.17.0 <6.17.0-35.35
  2. Affected versionversion=6.8.0 <6.8.0-124.124
  3. Affected versionversion=7.0.0 <7.0.0-22.22

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Canonical · Ubuntuversion=6.17.0 <6.17.0-35.35; version=6.8.0 <6.8.0-124.124; version=7.0.0 <7.0.0-22.22

Published CVSS scores

3.3Canonical Ltd.CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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