Security readout for executives and security teams
Plain-English summary
ImageMagick versions before 7.1.2-15 can miscalculate memory when creating UHDR images with very large dimensions. That can crash image-processing services and may permit an out-of-bounds heap write. Organizations using ImageMagick on untrusted images should treat this as an urgent availability risk.
Executive priority
Prioritize remediation for internet-facing or customer-supplied image workflows. The main documented business risk is service disruption, with possible heap memory corruption. Patch promptly, especially in automated media processing systems.
Technical view
The flaw is in `WriteUHDRImage` in `coders/uhdr.c`. It uses 32-bit signed `int` arithmetic for pixel buffer sizing, so large dimensions can overflow, allocate too little heap memory, then write out of bounds. Sources rate it CVSS 8.2 high, with network attack vector, low complexity, no privileges, and no user interaction.
Likely exposure
Exposure is most likely where ImageMagick before 7.1.2-15 is used by web apps, APIs, batch jobs, or media pipelines to write UHDR images from untrusted or attacker-controlled inputs.
Exploitation context
The provided bundle does not show CISA KEV listing or confirmed active exploitation. The CVSS vector indicates plausible remote triggering where ImageMagick processing is exposed, but the sources do not provide exploit-in-the-wild evidence.
Researcher notes
Key evidence is the signed integer overflow leading to undersized allocation and heap out-of-bounds write in UHDR output handling. Do not assume broader codec impact beyond the cited UHDR write path without vendor evidence.
Mitigation direction
- Upgrade ImageMagick to version 7.1.2-15 or later.
- Check operating system vendor advisories for backported package fixes.
- Restrict untrusted image processing until patched where feasible.
- Limit resource consumption for image conversion services.
- Monitor ImageMagick-facing services for crashes or abnormal restarts.
Validation and detection
- Inventory ImageMagick versions across hosts, containers, and build images.
- Identify workloads that write or convert UHDR images.
- Confirm packages are version 7.1.2-15 or vendor-patched equivalents.
- Review application paths that pass untrusted images to ImageMagick.
- Check logs for recent ImageMagick crashes during image conversion.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-122: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCWE-190: Exact CWE lookup
Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2026-25794 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- High
- CVSS
- 8.2 (3.1)
- Known Exploited
- No
- Published
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
SSVC decision data
CVSS vector scores
2 official scoresWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H3.94.2GitHub_MCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H3.94.2redhat-SADPVulnerability scoring details
Base CVSS 3.1 score
8.2HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Base CVSS 3.1 score
8.2HighVector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Vulnerability timeline
Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.
- CVE reservedCVE Program
The CVE ID was reserved by the assigning CNA.
- ADP timelineredhat-SADP
Made public.
- CVE publishedCVE Program
The CVE record was published.
- ADP timelineredhat-SADP
Reported to Red Hat.
- CVE updatedCVE Program
The CVE record metadata indicates this as the latest update time.
ADP provider summaries
- 2026-02-24T02:01:50.796Z: Reported to Red Hat.
- 2026-02-24T00:53:23.396Z: Made public.
Source materials
- CVE List V5 sourceCVE List V5
- https://github.com/ImageMagick/ImageMagick/security/advisories/GHSA-vhqj-f5cj-9x8hCVE reference, GitHub_M · x_refsource_CONFIRM
- https://access.redhat.com/security/cve/CVE-2026-25794CVE reference, redhat-SADP · vdb-entry, x_refsource_REDHAT
- RHBZ#2442110CVE reference, redhat-SADP · issue-tracking, x_refsource_REDHAT
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-25794.jsonCVE reference, redhat-SADP · x_sadp-csaf-vex
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Heap-based Buffer Overflow
Heap-based Buffer Overflow represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Integer Overflow or Wraparound
Integer Overflow or Wraparound represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.