CVE-2021-4009: debian debian_linux
CVSS: 7.8v3.1HighModified
AliasesUBUNTU-CVE-2021-4009DEBIAN-CVE-2021-4009
Published 17-12-2021Last modified 03-08-2024
Vulnerability summary
CVE-2021-4009 is a high (CVSS 7.8) vulnerability in debian debian_linux. EPSS estimates a 0.61% chance of exploitation in the next 30 days, higher than 48.4% of scored vulnerabilities.
CVSS score
7.8/10
010
High · v3.1 (NVD)EPSS score
0.61%
0%100%
Low · +0.04 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 19 · Related 14DLA-2869-1DSA-5027-1MGASA-2021-0573OPENSUSE-SU-2021:1606-1OPENSUSE-SU-2021:4136-1OPENSUSE-SU-2024:11685-1OPENSUSE-SU-2024:11699-1RHSA-2022:0003RHSA-2022:1917SUSE-SU-2021:4119-1SUSE-SU-2021:4120-1SUSE-SU-2021:4121-1SUSE-SU-2021:4122-1SUSE-SU-2021:4124-1SUSE-SU-2021:4136-1SUSE-SU-2021:4136-2USN-5193-1USN-5193-2USN-5193-3
Timeline
- 17-12-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
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 SProcXFixesCreatePointerBarrier function. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
CVSS metrics
4 scores · 3 sources · 2 versionsHigh 7.8Preferred score · NVD (NIST)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HSourcesAll 3 agree
- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
High 7.2Preferred score · NVD (NIST)
AV:L/AC:L/Au:N/C:C/I:C/A:CSourcesSingle source
EPSS trend
Probability
0.61%
Chance of exploitation in the next 30 days
Percentile
48%
Versus all other CVEs
30-day change
+0.04 pp
From 0.57% on 19-09-2026
19-09-202619-10-2026
EPSS score0.61%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu4 products
- xorg-server< 2:1.15.1-0ubuntu2.11+esm5 | < 2:1.18.4-0ubuntu0.12+esm1 | < 2:1.19.6-1ubuntu4.10 | < 2:1.20.13-1ubuntu1~20.04.2 | < 2:1.20.13-1ubuntu2
- xorg-server-hwe-16.04< 2:1.19.6-1ubuntu4.1~16.04.6+esm5
- xorg-server-hwe-18.04< 2:1.20.8-2ubuntu2.2~18.04.6
- xwayland< 2:21.1.3-1ubuntu1
Debian3 products
- xorg-server< 2:1.20.13-3
- xwayland< 2:21.1.4-1
- debian_linuxEOL9.0 | 10.0 | 11.0
Fedoraproject1 product
- fedoraEOL34 | 35
X.org1 product
- x_server< 1.20.14 | 21.1.0 | 21.1.1
4 vendors · 9 products
References
18 links- lists.x.org/archives/xorg-announce/2021-December/003122.htmlVendor Advisory
- lists.x.org/archives/xorg-announce/2021-December/003124.htmlVendor Advisory
- lists.fedoraproject.org/archives/…Vendor Advisory
- lists.fedoraproject.org/archives/…Vendor Advisory
- lists.fedoraproject.org/archives/…Vendor Advisory
- lists.fedoraproject.org/archives/…Vendor Advisory
- security.netapp.com/advisory/ntap-20220114-0004/Third Party Advisory
Show all 18 references
- security.gentoo.org/glsa/202305-30Vendor Advisory