CVE-2026-3949

A vulnerability was determined in strukturag libheif up to 1.21.2. This affects the function vvdec_push_data2 of the file libheif/plugins/decoder_vvdec.cc of the component HEIF File Parser. Executing a manipulation of the argument size can lead to out-of-bounds read. The attack needs to be launched locally. The exploit has been publicly disclosed and may be utilized. This patch is called b97c8b5f198b27f375127cd597a35f2113544d03. It is advisable to implement a patch to correct this issue.

CVSS v4.0

1.9 LOWCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1

3.3 LOWCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS v2.0

1.7 LOWAV:L/AC:L/Au:S/C:N/I:N/A:P

EPSS

0.12% chance of exploitation in the next 30 days, 2th percentile

Published

2026-03-11

Proof-of-concept exploits (1)

• biniamf/pocs/tree/main/libheif_vvdec

References

• CVE Record
• NVD entry

Related

• CVE-2026-10267
• CVE-2026-10268
• CVE-2026-10650
• CVE-2026-3713
• CVE-2026-5318
• CVE-2026-5342