CVE-2026-56378

Publication date 21 June 2026

Last updated 9 September 2026

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

3.7 · Low

Score breakdown

Description

ImageMagick before 7.1.2-15 (and 6.x before 6.9.13-40) contains a heap out-of-bounds read in the PCD coder's DecodeImage loop. A crafted PCD file can trigger a one-byte heap out-of-bounds read during image decoding, resulting in denial of service and potential disclosure of an adjacent heap byte.

Status

Package Ubuntu Release Status
imagemagick 26.04 LTS resolute
Not affected
25.10 questing Ignored end of life, was needs-triage
24.04 LTS noble
Vulnerable
22.04 LTS jammy
Fixed 8:6.9.11.60+dfsg-1.3ubuntu0.22.04.5+esm14
20.04 LTS focal
Fixed 8:6.9.10.23+dfsg-2.1ubuntu11.11+esm14
18.04 LTS bionic
Fixed 8:6.9.7.4+dfsg-16ubuntu6.15+esm16
16.04 LTS xenial
Fixed 8:6.8.9.9-7ubuntu5.16+esm24
14.04 LTS trusty
Fixed 8:6.7.7.10-6ubuntu3.13+esm25

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Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
imagemagick

Severity score breakdown

CVSS version:

Base score 6.3 · Medium

Vector: CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N

Base score 3.7 · Low

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

References

Related Ubuntu Security Notices (USN)

    • USN-8739-1
    • ImageMagick vulnerabilities
    • 8 September 2026

Other references

Access our resources on patching vulnerabilities