CVE-2016-1521: debian debian_linux
Vulnerability summary
CVE-2016-1521 is a high (CVSS 8.8) vulnerability in debian debian_linux. EPSS estimates a 4.06% chance of exploitation in the next 30 days, higher than 90.6% of scored vulnerabilities.
Not severe (CVSS 8.8, network access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 8 · Related 2Timeline
- 13-02-2016PublishedVulnerability first disclosed.
- 05-08-2024Last modifiedVulnerability information updated.
Description
The directrun function in directmachine.cpp in Libgraphite in Graphite 2 1.2.4, as used in Mozilla Firefox before 43.0 and Firefox ESR 38.x before 38.6.1, does not validate a certain skip operation, which allows remote attackers to execute arbitrary code, obtain sensitive information, or cause a denial of service (out-of-bounds read and application crash) via a crafted Graphite smart font.
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated8.8HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated8.8HighCVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
EPSS trend
Probability
4.06%
Chance of exploitation in the next 30 days
Percentile
91%
Versus all other CVEs
30-day change
No change 0.00 pp
From 4.06% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: network-reachable, no authentication, user interaction (CVSS vector). Other conditions: not stated in public data.
Debian2 products
- graphite2< 1.3.5-1
- debian_linuxEOL7.0 | 8.0
Mozilla2 products
- firefox≤ 42.0 | 38.0.1 | 38.0.5 | 38.1.0 | 38.1.1 | 38.2.0 | 38.2.1 | 38.3.0 | 38.4.0 | 38.5.0 | 38.5.1 | 38.5.2 | 38.6.0
- thunderbird≤ 38.5.1
Fedoraproject1 product
- fedoraEOL22 | 23
Sil1 product
- graphite2≤ 1.2.4
Ubuntu1 product
- graphite2< 1.2.4-1ubuntu1.1 | < 1.3.5-1ubuntu1
5 vendors · 7 products
References
24 links- www.oracle.com/technetwork/topics/security/linuxbulletinapr2016-2952096.htmlX Refsource CONFIRM
- www.oracle.com/technetwork/topics/security/linuxbulletinjan2016-2867209.htmlX Refsource CONFIRM
- blog.talosintel.com/2016/02/vulnerability-spotlight-libgraphite.htmlX Refsource MISCThird Party AdvisoryREPORT
Show all 24 references
- lists.fedoraproject.org/pipermail/package-announce/2016-February/177520.htmlVendor AdvisoryX Refsource FEDORAThird Party Advisory
- lists.fedoraproject.org/pipermail/package-announce/2016-May/184623.htmlVendor AdvisoryX Refsource FEDORAThird Party Advisory