CVE-2022-27651

In-container privilege gain via inherited Linux capabilities

Published Apr 4, 2022 · Updated Aug 3, 2024

Incorrect default permissions in Buildah before 1.25.0 allow local users to gain Linux process capabilities via capable executables. The run_linux.go capability setup adds requested capabilities to the inheritable set, while chroot/run.go copies the OCI specification's inheritable set into the child instead of clearing it. Exploitation requires code execution inside a container containing an executable with inheritable file capabilities; gains remain bounded by the container capability bounding set and do not escape the sandbox.

CVSS severity6.8
Medium
EPSS probability1.26%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect default permissions in Buildah before 1.25.0 allow local users to gain Linux process capabilities via capable executables. The run_linux.go capability setup adds requested capabilities to the inheritable set, while chroot/run.go copies the OCI specification's inheritable set into the child instead of clearing it. Exploitation requires code execution inside a container containing an executable with inheritable file capabilities; gains remain bounded by the container capability bounding set and do not escape the sandbox.

The record

CVE
CVE-2022-27651
Published
Apr 4, 2022
Updated
Aug 3, 2024
Vendor
Containers
Product
Buildah
Classifications
CWE-276, T1548
Attack vector
local
Privileges
Unavailable

Timeline

How it unfolded

  1. Apr 4, 2022CVE publishedPublication date reported by the CVE source.
  2. Aug 3, 2024Record 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=Affects buildah v1.24.0 and prior, Fixed in - v1.25.0

What conditions does exploitation require?

Attack vectorlocal
Required privilegesUnavailable in this record.

What is affected?

Containers · Buildahversion=Affects buildah v1.24.0 and prior, Fixed in - v1.25.0

Published CVSS scores

4.9NVDAV:N/AC:M/Au:S/C:P/I:P/A:N
5.9SUSECVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
6.8NVDCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A: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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
PrivilegesUnavailable
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-276Incorrect Default Permissions
T1548Abuse Elevation Control Mechanism

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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