CVE-2026-79619Public exploit

Local authorization bypass via namespace-scoped capabilities

Published Aug 26, 2026 · Updated Aug 27, 2026

Incorrect authorization in affected OpenZFS releases allows local users to perform root-only pool operations through privileged ioctls. The Linux secpolicy_sys_config and secpolicy_zinject checks treat CAP_SYS_ADMIN in a user-created namespace as host authority instead of requiring a global-zone credential. Access requires permission to open /dev/zfs and enabled unprivileged user namespaces; no target-pool or backing-device access is required.

CVSS severity7.3
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in affected OpenZFS releases allows local users to perform root-only pool operations through privileged ioctls. The Linux secpolicy_sys_config and secpolicy_zinject checks treat CAP_SYS_ADMIN in a user-created namespace as host authority instead of requiring a global-zone credential. Access requires permission to open /dev/zfs and enabled unprivileged user namespaces; no target-pool or backing-device access is required.

The record

CVE
CVE-2026-79619
Published
Aug 26, 2026
Updated
Aug 27, 2026
Vendor
OpenZFS
Product
OpenZFS
Classifications
CWE-863, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 26, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 27, 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=0.7.0 <2.2.11
  2. Affected versionversion=2.3.0 <2.3.9
  3. Affected versionversion=2.4.0 <2.4.4

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

OpenZFS · OpenZFSversion=0.7.0 <2.2.11; version=2.3.0 <2.3.9; version=2.4.0 <2.4.4

Published CVSS scores

7.3UbuntuCVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1068Exploitation for Privilege Escalation

Public exploit references

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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