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CVE-2026-120246

6.8 mediumEPSS 0.1%

Medium (6.8). EPSS 0.1% estimated probability of exploitation activity in the next 30 days.

FFmpeg 4.4 through 9.0.2 contains a use of uninitialized variable vulnerability in the CDXL decoder that leaks stack memory into decoded pixels via unfilled HAM palette entries. Attackers can craft a type-0 CDXL file whose HAM pixels select unfilled new_palette entries in cdxl_decode_ham8() or cdxl_decode_ham6(), exposing stack bytes and pointer fragments in the BGR24 output.

Severity

CVSS 4.0

6.8 medium
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

CVSS 3.1

5.5 medium
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
EPSS
0.1% estimated probability of exploitation activity in the next 30 days; 2nd percentile. Scored 2026-11-01. A forecast for this CVE across the internet, not for your own systems.
CWE
CWE-457 Use of Uninitialized Variable
Published
Modified
Record from
the NVD, synced

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References

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