CVE-2019-6978: canonical ubuntu_linux Double Free
Vulnerability summary
CVE-2019-6978 is a critical (CVSS 9.8) Double Free vulnerability in canonical ubuntu_linux. EPSS estimates a 4.45% chance of exploitation in the next 30 days, higher than 91.4% of scored vulnerabilities.
Severe, CVSS 9.8 (NVD); no exploitation reported by the 5 checked sources; EPSS 4% (FIRST, 03-11-2026)
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 13 · Duplicates 2 · Related 9Timeline
- 28-01-2019PublishedVulnerability first disclosed.
- 04-08-2024Last modifiedVulnerability information updated.
Description
The GD Graphics Library (aka LibGD) 2.2.5 has a double free in the gdImage*Ptr() functions in gd_gif_out.c, gd_jpeg.c, and gd_wbmp.c. NOTE: PHP is unaffected.
CVSS metrics
6 scores · 5 sources · 2 versions- OSV · AlpineEcosystem advisory · calculated9.8CriticalCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- OSV · Red hatEcosystem advisory · calculated5.3MediumCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:LDiffers
- 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
EPSS trend
Probability
4.45%
Chance of exploitation in the next 30 days
Percentile
91%
Versus all other CVEs
30-day change
No change 0.00 pp
From 4.45% 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.
Redhat6 products
- libwmf< 0:0.2.9-8.el8_0 | < 0:0.2.8.4-44.el7
- libwmf-debuginfo< 0:0.2.9-8.el8_0 | < 0:0.2.8.4-44.el7
- libwmf-debugsource< 0:0.2.9-8.el8_0
- libwmf-devel< 0:0.2.9-8.el8_0 | < 0:0.2.8.4-44.el7
- libwmf-lite< 0:0.2.9-8.el8_0 | < 0:0.2.8.4-44.el7
Debian2 products
- libgd2< 2.2.5-5.1
- debian_linuxEOL8.0 | 9.0
Alpine1 product
- gd< 2.2.5-r2
Canonical1 product
- ubuntu_linuxEOL14.04 | 16.04 | 18.04 | 18.10
Libgd1 product
- libgd2.2.5
Mageia1 product
- libwmf< 0.2.12-1.mga6
Ubuntu1 product
- libgd2< 2.1.0-3ubuntu0.11 | < 2.1.1-4ubuntu0.16.04.11 | < 2.2.5-4ubuntu0.3
7 vendors · 13 products
References
31 links- github.com/php/php-src/commit/089f7c0bc28d399b0420aa6ef058e4c1c120b2aeX Refsource MISCPatchThird Party Advisory
lists.debian.org/debian-lts-announce/2019/01/msg00028.htmlMailing ListX Refsource MLISTThird Party Advisory- github.com/libgd/libgd/commit/553702980ae89c83f2d6e254d62cf82e204956d0X Refsource MISCPatchThird Party Advisory
