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CVE-2026-52721 Red Hat CVE debrief

CVE-2026-52721 is a MEDIUM-severity vulnerability with a CVSS score of 5.3. The vulnerability affects GStreamer's pcapparse element, which is primarily used in debugging pipelines. A local attacker could trick a user into processing a specially crafted PCAP file, potentially leading to a crash or information disclosure.

Vendor
Red Hat
Product
Red Hat Enterprise Linux 10
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-15
Original CVE updated
2026-06-15
Advisory published
2026-06-15
Advisory updated
2026-06-15

Who should care

Users of GStreamer, particularly those who process PCAP files, should be aware of this vulnerability. However, the primary exposure is limited due to the element's use mainly in debugging pipelines.

Technical summary

Multiple out-of-bounds read vulnerabilities were found in GStreamer's pcapparse element. Malformed PCAP records can trigger reads beyond buffer boundaries during IPv4/TCP header parsing.

Defensive priority

MEDIUM

Recommended defensive actions

  • Review and update GStreamer installations to ensure the latest security patches are applied.
  • Be cautious when processing PCAP files from untrusted sources.

Evidence notes

The CVE was published on 2026-06-15T20:16:32.700Z and last modified on 2026-06-15T21:09:52.020Z. The vendor is listed as Unknown Vendor, but evidence suggests a connection to Redhat.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-52721 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-52721

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

  • CVE-2026-52721 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-52721

    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.