CVE-2016-6128: canonical ubuntu_linux Improper Input Validation
Vulnerability summary
CVE-2016-6128 is a high (CVSS 7.5) Improper Input Validation vulnerability in canonical ubuntu_linux. EPSS estimates a 6.80% chance of exploitation in the next 30 days, higher than 94% of scored vulnerabilities.
Severe, CVSS 7.5 (NVD); no exploitation reported by the 5 checked sources; EPSS 7% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 9 · Related 6Timeline
- 07-08-2016PublishedVulnerability first disclosed.
- 06-08-2024Last modifiedVulnerability information updated.
Description
The gdImageCropThreshold function in gd_crop.c in the GD Graphics Library (aka libgd) before 2.2.3, as used in PHP before 7.0.9, allows remote attackers to cause a denial of service (application crash) via an invalid color index.
CVSS metrics
6 scores · 4 sources · 3 versions- OSV · AlpineEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
6.80%
Chance of exploitation in the next 30 days
Percentile
94%
Versus all other CVEs
30-day change
No change 0.00 pp
From 6.80% 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, no user interaction (CVSS vector). Other conditions: not stated in public data.
Debian2 products
- libgd2< 2.2.2-29-g3c2b605-1
- debian_linuxEOL8.0
Alpine1 product
- gd< 2.2.1-r2 | < 2.2.3-r0
Canonical1 product
- ubuntu_linuxEOL12.04 | 14.04 | 15.10 | 16.04
Libgd1 product
- libgd≤ 2.2.2
Opensuse1 product
- leapEOL42.1
Ubuntu1 product
- libgd2< 2.1.0-3ubuntu0.2 | < 2.1.1-4ubuntu0.16.04.2
6 vendors · 7 products
References
18 links- lists.opensuse.org/opensuse-updates/2016-08/msg00086.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- lists.opensuse.org/opensuse-updates/2016-09/msg00078.htmlVendor AdvisoryX Refsource SUSEMailing ListThird Party Advisory
- github.com/libgd/libgd/commit/6ff72ae40c7c20ece939afb362d98cc37f4a1c96X Refsource CONFIRMIssue TrackingThird Party Advisory
Show all 18 references
- github.com/libgd/libgd/commit/1ccfe21e14c4d18336f9da8515cd17db88c3de61X Refsource CONFIRMIssue TrackingPatchThird Party Advisory