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PatchSiren cyber security CVE debrief

CVE-2026-5201 Red Hat CVE debrief

CVE-2026-5201 affects gdk-pixbuf's JPEG image loader and can be triggered by a specially crafted JPEG. The flaw is a heap-based buffer overflow caused by improper validation of color component counts. Because exploitation does not require user interaction and can occur through image-processing paths such as thumbnail generation, the main impact is application crash and denial of service.

Vendor
Red Hat
Product
Red Hat Enterprise Linux 10
CVSS
HIGH 7.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-03-31
Original CVE updated
2026-07-15
Advisory published
2026-03-31
Advisory updated
2026-07-15

Who should care

Administrators and security teams responsible for systems that use gdk-pixbuf, especially Linux desktop, server, and image-processing environments. Red Hat Enterprise Linux variants listed in the NVD record should be prioritized, along with any application stack that parses untrusted JPEG content.

Technical summary

NVD and Red Hat references describe a heap-based buffer overflow in the gdk-pixbuf JPEG loader, mapped to CWE-122. The published CVSS vector is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, indicating a network-reachable, unauthenticated, no-user-interaction condition with availability impact only. The vulnerability is present when processing specially crafted JPEG images and can surface in automated workflows that generate thumbnails or otherwise decode untrusted images.

Defensive priority

High

Recommended defensive actions

  • Review whether gdk-pixbuf is installed or bundled in affected systems and applications.
  • Apply vendor fixes or follow the linked Red Hat advisories for impacted product builds.
  • Prioritize systems that process untrusted JPEG files automatically, such as thumbnailing or media indexing services.
  • Monitor for crashes or service instability in image-processing components until remediation is complete.
  • Track the relevant Red Hat errata for the specific RHEL releases listed in the NVD record.

Evidence notes

This debrief is based only on the supplied NVD modification record and the referenced official/vendor links. The record explicitly states a heap-based buffer overflow in the gdk-pixbuf JPEG loader due to improper validation of color component counts, with potential remote exploitation without user interaction and denial-of-service impact. The source metadata also lists CWE-122 and a CVSS 3.1 vector of AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. Red Hat advisories, the GNOME issue tracker entry, and Debian LTS notice are referenced in the source corpus as corroborating vendor/maintainer material. No KEV listing is present in the supplied data.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-5201 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-5201

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-5201 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-5201

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.