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CVE-2026-38345 FFmpeg CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-28T00:17:27.197Z and has not been modified since then. A Division-by-Zero vulnerability exists in the ff_sws_init_single_context function of FFmpeg, which allows attackers to cause a Denial of Service (DoS) via a crafted input. The vulnerability has a CVSS score of 6.5 and a severity of MEDIUM. This issue affects FFmpeg versions prior to the patched version, and users should review and apply patches or updates to prevent potential Denial of Service (DoS) attacks. Users and administrators of FFmpeg, especially those using versions prior to the patched version, should review and apply patches or updates to prevent potential Denial of Service (DoS) attacks. This includes reviewing FFmpeg usage, monitoring logs for potential Denial of Service (DoS) attempts, and implementing input validation and sanitization for FFmpeg inputs. Security teams and vulnerability management teams should prioritize this issue and ensure that affected systems are updated or mitigated accordingly.

Vendor
FFmpeg
Product
FFmpeg
CVSS
MEDIUM 6.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-28
Original CVE updated
2026-09-02
Advisory published
2026-08-28
Advisory updated
2026-09-02

Who should care

Users and administrators of FFmpeg, especially those using versions prior to the patched version, should review and apply patches or updates to prevent potential Denial of Service (DoS) attacks. This includes reviewing FFmpeg usage, monitoring logs for potential Denial of Service (DoS) attempts, and implementing input validation and sanitization for FFmpeg inputs. Security teams and vulnerability management teams should prioritize this issue and ensure that affected systems are updated or mitigated accordingly.

Technical summary

A Division-by-Zero vulnerability exists in the ff_sws_init_single_context function of FFmpeg, which allows attackers to cause a Denial of Service (DoS) via a crafted input. The vulnerability has a CVSS score of 6.5 and a severity of MEDIUM. This issue affects FFmpeg versions prior to the patched version, and users should review and apply patches or updates to prevent potential Denial of Service (DoS) attacks.

Defensive priority

Medium-priority defensive review recommended due to potential for Denial of Service (DoS) via crafted input.

Recommended defensive actions

  • Review and apply vendor patches or updates for FFmpeg.
  • Implement input validation and sanitization for FFmpeg inputs.
  • Monitor FFmpeg usage and logs for potential Denial of Service (DoS) attempts.

Evidence notes

Evidence from official CVE Program record and NVD vulnerability detail page supports the existence of a Division-by-Zero vulnerability in FFmpeg. Further review of source reference and vendor information is needed to assess potential impact and verify affected systems. Defenders should review FFmpeg usage, monitor logs for potential Denial of Service (DoS) attempts, and apply patches or updates as recommended by the vendor.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-38345 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-38345

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

  • CVE-2026-38345 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-38345

    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.