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CVE-2026-65704

FFmpeg through 8.1.2 contains an out-of-bounds write vulnerability that allows attackers to cause heap corruption by supplying a crafted ffconcat file processed with the -safe 0 flag. The TY demuxer's demux_audio() function decrements packet size without bounds checking, producing a negative size value that is passed to memcpy() in shorten_decode_frame(), where conversion to size_t wraps the value to near SIZE_MAX and triggers reads beyond the source allocation and writes far beyond the Shorten
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:8e39caea522b8c2b97fa862b526d352ed56851eca83d995332a25c01f885a30e
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
2

Preserved source conflicts

No provider value was silently selected as the winner.

cvss · 2 assertions

{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:342dfdd91326a16c6117a401a0b2ef5ed75c04e66ef32a43bf303d5a69b3411f · sha256:48a8032bd82e7caf… · /containers/cna/metrics/1/cvssV3_1

{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"LOCAL","baseScore":7.3,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpac…

  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:342dfdd91326a16c6117a401a0b2ef5ed75c04e66ef32a43bf303d5a69b3411f · sha256:48a8032bd82e7caf… · /containers/cna/metrics/0/cvssV4_0
cwe · 2 assertions

{"cweId":"CWE-787","description":"Out-of-bounds Write","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:342dfdd91326a16c6117a401a0b2ef5ed75c04e66ef32a43bf303d5a69b3411f · sha256:48a8032bd82e7caf… · /containers/cna/problemTypes/0/descriptions/0

{"cweId":"CWE-191","description":"Integer Underflow (Wrap or Wraparound)","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:342dfdd91326a16c6117a401a0b2ef5ed75c04e66ef32a43bf303d5a69b3411f · sha256:48a8032bd82e7caf… · /containers/cna/problemTypes/0/descriptions/1

Affected products and versions

1 source assertion
{"defaultStatus":"affected","product":"FFmpeg","repo":"https://code.ffmpeg.org/FFmpeg/FFmpeg","vendor":"FFmpeg","versions":[{"lessThanOrEqual":"8.1.2","status":"affected","version":"0","versionType":"custom"},{"status":"unaffected","version":"de771bd52774a52d45b0e2c82e56995a1ef40df7","versionType":"git"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:342dfdd91326a16c6117a401a0b2ef5ed75c04e66ef32a43bf303d5a69b3411f · sha256:48a8032bd82e7caf… · /containers/cna/affected/0

Provider-owned CVSS observations

2 source assertions
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"HIGH","baseScore":7.8,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:342dfdd91326a16c6117a401a0b2ef5ed75c04e66ef32a43bf303d5a69b3411f · sha256:48a8032bd82e7caf… · /containers/cna/metrics/1/cvssV3_1
{"metric":{"Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"LOCAL","baseScore":7.3,"baseSeverity":"HIGH","exploitMaturity":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"NOT_DEFINED","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","version":"4.0","vulnAvailabilityImpact":"HIGH","vulnConfidentialityImpac…
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:342dfdd91326a16c6117a401a0b2ef5ed75c04e66ef32a43bf303d5a69b3411f · sha256:48a8032bd82e7caf… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

2 source assertions
{"cweId":"CWE-787","description":"Out-of-bounds Write","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:342dfdd91326a16c6117a401a0b2ef5ed75c04e66ef32a43bf303d5a69b3411f · sha256:48a8032bd82e7caf… · /containers/cna/problemTypes/0/descriptions/0
{"cweId":"CWE-191","description":"Integer Underflow (Wrap or Wraparound)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:342dfdd91326a16c6117a401a0b2ef5ed75c04e66ef32a43bf303d5a69b3411f · sha256:48a8032bd82e7caf… · /containers/cna/problemTypes/0/descriptions/1

Source references

3 source assertions
{"name":"Patch Commit","tags":["patch"],"url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/de771bd52774a52d45b0e2c82e56995a1ef40df7"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:342dfdd91326a16c6117a401a0b2ef5ed75c04e66ef32a43bf303d5a69b3411f · sha256:48a8032bd82e7caf… · /containers/cna/references/1
{"name":"Pull Request","tags":["issue-tracking"],"url":"https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23767"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:342dfdd91326a16c6117a401a0b2ef5ed75c04e66ef32a43bf303d5a69b3411f · sha256:48a8032bd82e7caf… · /containers/cna/references/0
{"tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/ffmpeg-out-of-bounds-write-via-ty-demuxer-and-shorten-decoder"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:342dfdd91326a16c6117a401a0b2ef5ed75c04e66ef32a43bf303d5a69b3411f · sha256:48a8032bd82e7caf… · /containers/cna/references/2

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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