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PatchSiren cyber security CVE debrief

CVE-2025-71438 GPAC Project CVE debrief

A CVE record describes an out-of-bounds read vulnerability in GPAC Project/MP4Box before v26.07.0, which allows attackers to cause a Denial of Service (DoS) via a crafted AC4 file. This vulnerability exists in the gf_odf_ac4_cfg_dsi_v1 function in the descriptors.c file. Defenders should assess exposure and prioritize patching or updating to prevent potential DoS attacks. The vulnerability has a CVSS score and severity not provided in the CVE record. The CVE record was published on 2026-10-21T00:00:00.000Z.

Vendor
GPAC Project
Product
MP4Box
CVSS
Unknown
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-21
Original CVE updated
2026-10-26
Advisory published
2026-10-21
Advisory updated
2026-10-26

Who should care

Defenders responsible for systems or applications using GPAC Project/MP4Box should assess exposure and prioritize patching or updating to prevent potential DoS attacks. This includes operators, security teams, and vulnerability management teams that oversee the use of GPAC Project/MP4Box in their environments. They should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. They should also plan for

Why it matters

CVE-2025-71438 describes an out-of-bounds read vulnerability in GPAC Project/MP4Box before v26.07.0. Defenders should prioritize verifying the version in use and applying patches to prevent potential DoS attacks.

  • Potential Denial of Service (DoS) attacks
  • Need to verify GPAC Project/MP4Box version and apply patches

Technical summary

The vulnerability exists in the gf_odf_ac4_cfg_dsi_v1 function in the descriptors.c file of GPAC Project/MP4Box before v26.07.0. An out-of-bounds read can be triggered by supplying a crafted AC4 file, potentially leading to a Denial of Service (DoS). The CVE record and source item provide limited information about the vulnerability, including its existence and potential impact. However, further details about affected versions, exploitation, and remediation are not provided. Defenders should prioritize verifying the version in use and applying patches to prevent potential DoS attacks.

Defensive priority

Defenders should prioritize verifying the version of GPAC Project/MP4Box in use and applying patches or updates to prevent potential DoS attacks.

Recommended defensive actions

  • Verify the version of GPAC Project/MP4Box in use
  • Apply patches or updates to prevent potential DoS attacks
  • Monitor for potential exploitation attempts
  • Review compensating controls for exposed systems while remediation is scheduled and verified
  • Check relevant monitoring, detection, and logs for exposed assets that need extra review
  • Track exceptions, retest remediated assets, and close the item only after evidence is documented
  • Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and source item provide limited information about the vulnerability, including its existence and potential impact. However, further details about affected versions, exploitation, and remediation are not provided.

Sources and references

Verified primary and authoritative sources

  • CVE-2025-71438 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2025-71438

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

  • CVE-2025-71438 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2025-71438

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

Supplemental references

  • CVE-2025-71438

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2025/71xxx/CVE-2025-71438.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://github.com/sigdevel/pocs/blob/main/res/gpac/MP4Box/50/50_gf_odf_ac4_cfg_dsi_v1_odf_descriptors_c_2179

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://github.com/gpac/gpac/issues/3303

    Supplemental source

  • Source reference

    Unverified legacy reference

    URL: https://github.com/gpac/gpac/commit/13eb5b76560aaf7813b865a2ad433258478e2695

    Supplemental source

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.