PT-2026-135472
CVE-2026-120456
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Published
2026-11-02
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Updated
2026-11-02
Description by
CVSS 3.1
6.1
MediumMetricsAV:L/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H
L-SMASH through 2.14.5 contains a heap out-of-bounds write vulnerability in isom read hdlr() and isom read dref entry() in core/read.c triggered by oversized box sizes. Attackers can supply crafted MP4 or MOV files declaring hdlr or url box sizes larger than remaining data, stalling the stream position and corrupting heap memory to crash applications.
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