CVE-2021-41103

highpriority · track · 31OT risk · elevatedEPSS 0.005 · 43 %ileDEEURUUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.52% (43rd) EPSS
CVSS 7.2 · high
Is it mine?
22 products
Check your exposure
Who says so?
7 sources
cnnvd · enisa_euvd · fstec_bdu · osv

EPSS · scored 2026-10-24

containerd is an open source container runtime with an emphasis on simplicity, robustness and portability. A bug was found in containerd where container root directories and some plugins had insufficiently restricted permissions, allowing otherwise unprivileged Linux users to traverse directory contents and execute programs. When containers included executable programs with extended permission bits (such as setuid), unprivileged Linux users could discover and execute those programs. When the UID of an unprivileged Linux user on the host collided with the file owner or group inside a container, the unprivileged Linux user on the host could discover, read, and modify those files. This vulnerability has been fixed in containerd 1.4.11 and containerd 1.5.7. Users should update to these version when they are released and may restart containers or update directory permissions to mitigate the vulnerability. Users unable to update should limit access to the host to trusted users. Update directory permission on container bundles directories.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

02

cvss

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

7.8
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.9–7.8

v2.07.2highAV:L/AC:L/Au:N/C:C/I:C/A:Cprimary · NVD / NIST USexploitability 3.9 · impact 10
v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9
v3.05.9mediumCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondary · ENISA EU
v3.05.9mediumCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondary · security-advisories@github.comexploitability 2.5 · impact 3.4
v3.05.9mediumCVSS:3.0/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondary · OSV
v3.15.9mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:Csecondary · Siemens ProductCERT DE
v3.17.1highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:Usecondary · CVSS-BT (t0sche)
v3.15.9mediumAV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:Lsecondary · FSTEC (BDU) RU
v3.15.9mediumCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:O/RC:Csecondary · CISA US
03

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-22USprimaryCWE-22USCWE-22USCWE-22USCWE-22USCWE-276US
04

affected products (22)

Products and version ranges known to be affected.

showing 20 of 22
05

advisories (4)

Vendor and ecosystem advisories describing this.

  • SSA-222547SSA-222547: Third-Party Component Vulnerabilities in SCALANCE LPE9403 before V2.02022-06-14csaf · siemens_psirtDE

    Multiple vulnerabilities in the third-party components CivetWeb, Docker, Linux Kernel and systemd could allow an attacker to impact SCALANCE LPE9403 confidentiality, integrity and availability. Siemens has released an update for the SCALANCE LPE9403 and recommends to update to the latest version.

  • GHSA-c2h3-6mxw-7mvqInsufficiently restricted permissions on plugin directories2021-10-04ghsa · osvUS

    ### Impact A bug was found in containerd where container root directories and some plugins had insufficiently restricted permissions, allowing otherwise unprivileged Linux users to traverse directory contents and execute programs. When containers included executable programs with extended permission bits (such as setuid), unprivileged Linux users could discover and execute those programs. When the UID of an unprivileged Linux user on the host collided with the file owner or group inside a container, the unprivileged Linux user on the host could discover, read, and modify those files. ### Patches This vulnerability has been fixed in containerd 1.4.11 and containerd 1.5.7. Users should update to these version when they are released and may restart containers or update directory permissions to mitigate the vulnerability. ### Workarounds Limit access to the host to trusted users. Update directory permission on container bundles directories. ### For more information If you have any questions or comments about this advisory: * Open an issue in [github.com/containerd/containerd](https://github.com/containerd/containerd/issues/new/choose) * Email us at [security@containerd.io](mailto:security@containerd.io)

  • ICSA-22-167-09Siemens SCALANCE LPE9403 Third-Party Vulnerabilities2022-06-14icsa · cisa_csaf_otUS

    Multiple vulnerabilities in the third-party components CivetWeb, Docker, Linux Kernel and systemd could allow an attacker to impact SCALANCE LPE9403 confidentiality, integrity and availability. Siemens has released an update for the SCALANCE LPE9403 and recommends to update to the latest version.

  • GO-2022-0938Insufficiently restricted permissions on plugin directories in github.com/containerd/containerd2024-08-21vendor · osvUS

    Insufficiently restricted permissions on plugin directories in github.com/containerd/containerd

06

also known as (6)

Other names and identifiers for this entity.

07

sources

Which sources assert this record, and when.

cnnvdenisa_euvdfstec_bduosvcisa_csaf_otnvdsiemens_psirtNVDCVE.orgMITRE
published 2021-10-04modified 2026-06-17
09

references (37)

External citations — patches, advisories, analysis.

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