CVE-2021-4010
A flaw was found in xorg-x11-server in versions before 21.1.2 and before 1.20.14. An out-of-bounds access can occur in the SProcScreenSaverSuspend function. The highest threat from this vulnerability
02 Description
A flaw was found in xorg-x11-server in versions before 21.1.2 and before 1.20.14. An out-of-bounds access can occur in the SProcScreenSaverSuspend function. The highest threat from this vulnerability
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 0.61% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 49.1% 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
- 2021-12-17 00:00Z4 YR AGO
- Last updated
- 2024-08-03 17:16Z2 YR AGO
- Reserved
- 2021-11-23
- Assigning CNA
- redhat
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- CWE-119Improper Restriction of Operations within the Bounds of a Memory BufferClass
- Data version
- 5.1
- Document digest
- 1c5a6f7f0511ed87b59a2965229184f541c3c69001b18c065767edf57c9efe67
05 Affected products
06 References
- lists.x.orghttps://lists.x.org/archives/xorg-announce/2021-December/003122.html
- lists.x.orghttps://lists.x.org/archives/xorg-announce/2021-December/003124.html
- lists.fedoraproject.orgFEDORA-2021-2eb603951bhttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PDHYZM6FII35JA7J275MFCJO6ADJUPQX/
- lists.fedoraproject.orgFEDORA-2021-a7fd510294https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/T57DCF726O5LLTST4NBL5PQ7DLPB46HT/
- www.zerodayinitiative.comhttps://www.zerodayinitiative.com/advisories/ZDI-21-1549/
- www.debian.orgDSA-5027https://www.debian.org/security/2021/dsa-5027
- lists.fedoraproject.orgFEDORA-2021-69e96c8f68https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NKLSZCY47QK4RCJFXITYFALCGPJAFXOK/
- lists.fedoraproject.orgFEDORA-2021-664a6554a1https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NXTRPFEQLFZ6NT2LPLZEID664RGC3OCC/
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20220114-0004/
- security.gentoo.orgGLSA-202305-30https://security.gentoo.org/glsa/202305-30
07 Fixed in
AlmaLinux 8
- xorg-x11-server-Xdmx Fixed in 1.20.11-5.el8
- xorg-x11-server-Xephyr Fixed in 1.20.11-5.el8
- xorg-x11-server-Xnest Fixed in 1.20.11-5.el8
- xorg-x11-server-Xorg Fixed in 1.20.11-5.el8
- xorg-x11-server-Xvfb Fixed in 1.20.11-5.el8
- xorg-x11-server-Xwayland Fixed in 21.1.3-2.el8
- xorg-x11-server-common Fixed in 1.20.11-5.el8
- xorg-x11-server-devel Fixed
A version is affected if any line below covers it.
- Affected before 1.20.11-5.el8
- Affected before 1.20.11-5.el8_6.2
- xorg-x11-server-source Fixed in 1.20.11-5.el8
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Arch Linux
- xorg-server Fixed in 21.1.2-1
- xorg-xwayland Fixed in 21.1.4-1
Source: Arch Linux Security Tracker, the Arch Linux security team. Reformatted by exploit.cc.
CloudLinux 8
- xorg-x11-server-Xdmx Fixed in 1.20.11-5.el8
- xorg-x11-server-Xephyr Fixed in 1.20.11-5.el8
- xorg-x11-server-Xnest Fixed in 1.20.11-5.el8
- xorg-x11-server-Xorg Fixed in 1.20.11-5.el8
- xorg-x11-server-Xvfb Fixed in 1.20.11-5.el8
- xorg-x11-server-Xwayland Fixed in 21.1.3-2.el8
- xorg-x11-server-common Fixed in 1.20.11-5.el8
- xorg-x11-server-devel Fixed
A version is affected if any line below covers it.
- Affected before 1.20.11-5.el8
- Affected before 1.20.11-5.el8_6.2
- xorg-x11-server-source Fixed in 1.20.11-5.el8
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
- xorg-server Fixed in 2:1.20.13-3
- xwayland Fixed in 2:21.1.4-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- xorg-server Fixed in 2:1.20.13-3
- xwayland Fixed in 2:21.1.4-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- xorg-server Fixed in 2:1.20.13-3
- xwayland Fixed in 2:21.1.4-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 18.04 LTS
- xorg-server-hwe-18.04 Fixed in 2:1.20.8-2ubuntu2.2~18.04.6
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- xorg-server Fixed in 2:1.20.13-1ubuntu1~20.04.2
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 22.04 LTS
- xorg-server Fixed in 2:1.20.13-1ubuntu2
- xwayland Fixed in 2:21.1.3-1ubuntu1
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.