CVE-2023-25809

mediumpriority · track · 25EPSS 0.003 · 25 %ileDEEURUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

0.32% (25th) EPSS

CVSS 6.3 · medium

Is it mine?

15 products

Check your exposure

Who says so?

6 sources

cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-27

runc is a CLI tool for spawning and running containers according to the OCI specification. In affected versions it was found that rootless runc makes `/sys/fs/cgroup` writable in following conditons: 1. when runc is executed inside the user namespace, and the `config.json` does not specify the cgroup namespace to be unshared (e.g.., `(docker|podman|nerdctl) run --cgroupns=host`, with Rootless Docker/Podman/nerdctl) or 2. when runc is executed outside the user namespace, and `/sys` is mounted with `rbind, ro` (e.g., `runc spec --rootless`; this condition is very rare). A container may gain the write access to user-owned cgroup hierarchy `/sys/fs/cgroup/user.slice/...` on the host . Other users's cgroup hierarchies are not affected. Users are advised to upgrade to version 1.1.5. Users unable to upgrade may unshare the cgroup namespace (`(docker|podman|nerdctl) run --cgroupns=private)`. This is the default behavior of Docker/Podman/nerdctl on cgroup v2 hosts. or add `/sys/fs/cgroup` to `maskedPaths`.

cvss

Technical severity, 0–10. One row per scoring source.

6.3

010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · low–medium · 2.5–6.3

v3.16.3mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:Lprimary · NVD / NIST USexploitability 2 · impact 3.7

v3.16.3mediumAV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:Lsecondary · FSTEC (BDU) RU

v3.15mediumCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:Lsecondary · ENISA EU

v3.15mediumCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:L/I:L/A:Lsecondary · security-advisories@github.comexploitability 0.8 · impact 3.7

v3.12.5lowCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:N/I:N/A:Lsecondary · OSV

v3.15.8mediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:L/E:Usecondary · CVSS-BT (t0sche)

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Trackcoordinatorcisa_ssvcUS

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-281USCWE-281USCWE-281US

affected products (15)

Products and version ranges known to be affected.

Dell ECS <3.8.1.0all versionscert_bundDE
Dell PowerEdgeall versionscert_bundDEcpe:/h:dell:poweredge:-
IBM InfoSphere Information Serverall versionscert_bundDEcpe:/a:ibm:infosphere_information_server:-
Dell ECS< 3.8.1.0cert_bundDE
opencontainers runc≤ < 1.1.5enisa_euvdEU
Docker Inc. Runc≤ 1.1.5fstec_bduRU
АО «ИВК» Альт 8 СПall versionsfstec_bduRU
АО «НТЦ ИТ РОСА» РОСА ХРОМ≤ 12.4fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Special Edition≤ 1.7fstec_bduRU
ООО «РусБИТех-Астра» Astra Linux Special Edition≤ 4.7fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 11fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 12fstec_bduRU
Сообщество свободного программного обеспечения Debian GNU/Linux≤ 10fstec_bduRU
linuxfoundation runc< 1.1.5nvdUScpe:2.3:a:linuxfoundation:runc:*:*:*:*:*:*:*:*
Go github.com/opencontainers/runc< 1.1.5osvUSpkg:golang/github.com/opencontainers/runc

advisories (4)

Vendor and ecosystem advisories describing this.

WID-SEC-W-2023-1183docker: Mehrere SchwachstellenDeutsch2023-05-09csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in docker ausnutzen, um Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, einen Denial-of-Service-Zustand auszulösen, seine Privilegien zu erweitern und Daten zu manipulieren.
WID-SEC-W-2024-0794Dell ECS: Mehrere SchwachstellenDeutsch2024-04-04csaf · cert_bundDE
Ein Angreifer kann mehrere Schwachstellen in Dell ECS ausnutzen, um seine Privilegien zu erweitern, beliebigen Programmcode mit Administratorrechten auszuführen, Informationen offenzulegen, Dateien zu manipulieren, einen Cross-Site-Scripting-Angriff durchzuführen, Sicherheitsvorkehrungen zu umgehen oder einen Denial of Service Zustand herbeizuführen.
GHSA-m8cg-xc2p-r3fcrootless: `/sys/fs/cgroup` is writable when cgroupns isn't unshared in runc2023-03-30ghsa · osvUS
### Impact It was found that rootless runc makes `/sys/fs/cgroup` writable in following conditons: 1. when runc is executed inside the user namespace, and the `config.json` does not specify the cgroup namespace to be unshared (e.g.., `(docker|podman|nerdctl) run --cgroupns=host`, with Rootless Docker/Podman/nerdctl) 2. or, when runc is executed outside the user namespace, and `/sys` is mounted with `rbind, ro` (e.g., `runc spec --rootless`; this condition is very rare) A container may gain the write access to user-owned cgroup hierarchy `/sys/fs/cgroup/user.slice/...` on the host . Other users's cgroup hierarchies are not affected. ### Patches v1.1.5 (planned) ### Workarounds - Condition 1: Unshare the cgroup namespace (`(docker|podman|nerdctl) run --cgroupns=private)`. This is the default behavior of Docker/Podman/nerdctl on cgroup v2 hosts. - Condition 2 (very rare): add `/sys/fs/cgroup` to `maskedPaths`
GO-2023-1682Rootless: /sys/fs/cgroup is writable when cgroupns isn't unshared in github.com/opencontainers/runc2024-08-20vendor · osvUS
Rootless: /sys/fs/cgroup is writable when cgroupns isn't unshared in github.com/opencontainers/runc

also known as (6)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

cnnvd enisa_euvd fstec_bdu osv cert_bund nvd NVD CVE.org MITRE

published 2023-03-29modified 2026-06-17

references (12)

External citations — patches, advisories, analysis.

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