CVE-2026-41647Network attack vector

Authenticated daemon crash via unchecked tar error

Published May 7, 2026 · Updated May 7, 2026

NULL pointer dereference in Incus before 7.0.0 allows remote authenticated users to crash incusd via a truncated bucket backup. TransferManager.UploadAllFiles treats only io.EOF as a tar terminator, then dereferences hdr.Name after tr.Next returns another error with a nil header. Storage-bucket feature access and a restore operation are required; repeated imports can keep the daemon and its control-plane API unavailable.

CVSS severity6.5
Medium
EPSS probability0.39%
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 Incus before 7.0.0 allows remote authenticated users to crash incusd via a truncated bucket backup. TransferManager.UploadAllFiles treats only io.EOF as a tar terminator, then dereferences hdr.Name after tr.Next returns another error with a nil header. Storage-bucket feature access and a restore operation are required; repeated imports can keep the daemon and its control-plane API unavailable.

The record

CVE
CVE-2026-41647
Published
May 7, 2026
Updated
May 7, 2026
Vendor
Linux Containers
Product
Incus
Classifications
CWE-476, T1499
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 7, 2026CVE publishedPublication date reported by the CVE source.
  2. May 7, 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=< 7.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Linux Containers · Incusversion=< 7.0.0

Published CVSS scores

6.5GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
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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