CVE-2016-7943: fedoraproject fedora Out-of-bounds Write
CVSS: 9.8v3.0CriticalModified
AliasesALPINE-CVE-2016-7943UBUNTU-CVE-2016-7943DEBIAN-CVE-2016-7943
Published 13-12-2016Last modified 06-08-2024
Vulnerability summary
CVE-2016-7943 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in fedoraproject fedora. EPSS estimates a 4.46% chance of exploitation in the next 30 days, higher than 91.3% of scored vulnerabilities.
CVSS score
9.8/10
010
Critical · v3.0 (NVD)EPSS score
4.46%
0%100%
Low · +0.17 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 3 · Related 1Timeline
- 13-12-2016PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
The XListFonts function in X.org libX11 before 1.6.4 might allow remote X servers to gain privileges via vectors involving length fields, which trigger out-of-bounds write operations.
CVSS metrics
5 scores · 4 sources · 2 versionsCritical 9.8Preferred score · NVD (NIST)
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HSourcesAll 4 agree
- OSV · AlpineEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · UbuntuEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
High 7.5Preferred score · NVD (NIST)
AV:N/AC:L/Au:N/C:P/I:P/A:PSourcesSingle source
EPSS trend
Probability
4.46%
Chance of exploitation in the next 30 days
Percentile
91%
Versus all other CVEs
30-day change
+0.17 pp
From 4.29% on 19-09-2026
19-09-202619-10-2026
EPSS score4.46%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Alpine1 product
- libx11< 1.6.3-r1 | < 1.6.3-r3
Debian1 product
- libx11< 2:1.6.4-1
Fedoraproject1 product
- fedoraEOL25
Ubuntu1 product
- libx11< 2:1.6.2-1ubuntu2.1 | < 2:1.6.3-1ubuntu2.1
X.org1 product
- libx11≤ 1.6.3
5 vendors · 5 products
