Dashboard / CVE-2026-120456

CVE-2026-120456

MEDIUM
MEDIUM Priority: 0.01 BB Relevance: 39/100
Published: 2026-11-02 Modified: 2026-11-02 First seen: 2026-11-02 Status: active

Attack Surface

Low Complexity No Auth

CVSS Vector Breakdown

AV: Local
AC: Low
PR: None
UI: Passive
S: X
AT: None
VC: None
VI: Low
VA: High

Description

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.

Weakness Classification (1)

Affected Software (2)

VendorProductVersion
L-SMASH L-SMASH 0
L-SMASH L-SMASH 0

References & Advisories (6)

Bug Bounty Relevance

39 / 100
✓ No authentication
✓ Low complexity

CVSS Score

6.9 / 10.0 v4.0
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N/E:X/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

EPSS — Exploitation Probability

0.16%
Raw Score 0.001570
Percentile 5.0%
Date 2026-11-13

EPSS Trend

2026-11-13
0.00157
2026-11-12
0.00157
2026-11-10
0.00157
2026-11-09
0.00157
2026-11-08
0.00157
2026-11-07
0.00157
2026-11-06
0.00157
2026-11-05
0.00157
2026-11-04
0.00157
2026-11-03
0.00157

Intelligence Sources

mitre ref →
nvd ref →

External Links