CVE-2021-41133
Sandbox bypass via recent VFS-manipulating syscalls
02 Description
Sandbox bypass via recent VFS-manipulating syscalls
03 Exploitation and scoring
- Exploitation
- Assessed, none found. CISA's assessment recorded neither public exploit code nor evidence of exploitation when it was made.
- SSVC decision
- ExploitationnoneCISA recorded no public exploit code and no evidence of exploitation.
- AutomatablenoAt least one step from reconnaissance to exploitation cannot be reliably automated.
- Technical ImpacttotalSuccessful exploitation gives total control of the vulnerable component.
- EPSS probability
- 0.43% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 37.6% of scored records. A rank, not a probability.
- NVD base score
- 7.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2021-10-08 00:00Z5 YR AGO
- Last updated
- 2024-08-04 02:59Z2 YR AGO
- Reserved
- 2021-09-15
- Assigning CNA
- GitHub_M
- Record state
- PUBLISHED
- Severity
- High (CVSS 8.8)
- CNA CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
- Weaknesses
- CWE-20Improper Input ValidationClass
- Data version
- 5.1
- Document digest
- 50d6ee2fb4f09eecde907f0a33c0dce1573ce1bd63ab442fb1dd5f9381c96c7c
05 Affected products
06 References
- github.comhttps://github.com/flatpak/flatpak/security/advisories/GHSA-67h7-w3jq-vh4q
- github.comhttps://github.com/flatpak/flatpak/commit/1330662f33a55e88bfe18e76de28b7922d91a999
- github.comhttps://github.com/flatpak/flatpak/commit/26b12484eb8a6219b9e7aa287b298a894b2f34ca
- github.comhttps://github.com/flatpak/flatpak/commit/462fca2c666e0cd2b60d6d2593a7216a83047aaf
- github.comhttps://github.com/flatpak/flatpak/commit/4c34815784e9ffda5733225c7d95824f96375e36
- github.comhttps://github.com/flatpak/flatpak/commit/89ae9fe74c6d445bb1b3a40e568d77cf5de47e48
- github.comhttps://github.com/flatpak/flatpak/commit/9766ee05b1425db397d2cf23afd24c7f6146a69f
- github.comhttps://github.com/flatpak/flatpak/commit/a10f52a7565c549612c92b8e736a6698a53db330
- github.comhttps://github.com/flatpak/flatpak/commit/e26ac7586c392b5eb35ff4609fe232c52523b2cf
- lists.fedoraproject.orgFEDORA-2021-4b201d15e6https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R5656ONDP2MGKIJMKEC7N2NXCV27WGTC/
- www.debian.orgDSA-4984https://www.debian.org/security/2021/dsa-4984
- www.openwall.com[oss-security] 20211026 WebKitGTK and WPE WebKit Security Advisory WSA-2021-0006http://www.openwall.com/lists/oss-security/2021/10/26/9
- lists.fedoraproject.orgFEDORA-2021-c5a9c85737https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T5DKCYRC6MFSTFCUP4DELCOUUP3SFEFX/
- security.gentoo.orgGLSA-202312-12https://security.gentoo.org/glsa/202312-12
07 Fixed in
AlmaLinux 8
- flatpak Fixed
A version is affected if any line below covers it.
- Affected before 1.8.5-4.el8_4
- Affected before 1.8.5-5.el8_5
- flatpak-devel Fixed in 1.8.5-5.el8_5
- flatpak-libs Fixed
A version is affected if any line below covers it.
- Affected before 1.8.5-4.el8_4
- Affected before 1.8.5-5.el8_5
- flatpak-selinux Fixed
A version is affected if any line below covers it.
- Affected before 1.8.5-4.el8_4
- Affected before 1.8.5-5.el8_5
- flatpak-session-helper Fixed
A version is affected if any line below covers it.
- Affected before 1.8.5-4.el8_4
- Affected before 1.8.5-5.el8_5
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Arch Linux
- flatpak Fixed in 1.12.0-1
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
CloudLinux 8
- flatpak Fixed
A version is affected if any line below covers it.
- Affected before 1.8.5-4.el8_4
- Affected before 1.8.5-5.el8_5
- flatpak-devel Fixed in 1.8.5-5.el8_5
- flatpak-libs Fixed
A version is affected if any line below covers it.
- Affected before 1.8.5-4.el8_4
- Affected before 1.8.5-5.el8_5
- flatpak-selinux Fixed
A version is affected if any line below covers it.
- Affected before 1.8.5-4.el8_4
- Affected before 1.8.5-5.el8_5
- flatpak-session-helper Fixed
A version is affected if any line below covers it.
- Affected before 1.8.5-4.el8_4
- Affected before 1.8.5-5.el8_5
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- flatpak Fixed in 1.12.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- flatpak Fixed in 1.12.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- flatpak Fixed in 1.12.1-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- flatpak Fixed in 1.0.9-0ubuntu0.4
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- flatpak Fixed in 1.6.5-0ubuntu0.4
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.