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CVE-2026-110599— L-SMASH through 2.14.5 Double Free in HEVC and H.264 Importer Probe

Quick assessment

Affected
l-smash l-smash
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

L-SMASH 2.14.5 及更早版本中存在一个双重释放漏洞，位于 importer/nalu_imp.c 文件中的 hevc_setup_first_summary() 和 h264_setup_first_summary() 函数。该漏洞在错误处理路径上会释放借用的编解码器特定对象。攻击者可以构造一个缺少可解析 SPS（序列参数集）的 Annex-B 基本流，并将其提供给 lsmash_read_file() 函数或 boxdumper、remuxer、muxer 等工具，从而导致释放后使用（use-afte

CVSS 7.1 · High EPSS 0.24% · P14

Affected Version Matrix 1

VendorProduct Version RangeStatus
l-smash l-smash ≤ 2.14.5 affected
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I. Basic Information for CVE-2026-110599

Vulnerability Information
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Vulnerability Title
L-SMASH through 2.14.5 Double Free in HEVC and H.264 Importer Probe
Source: CVE Program / CVE List V5
Vulnerability Description
L-SMASH through 2.14.5 contains a double free vulnerability in hevc_setup_first_summary() and h264_setup_first_summary() in importer/nalu_imp.c that frees borrowed codec-specific objects on error paths. Attackers can supply a crafted Annex-B elementary stream lacking a parseable SPS to lsmash_read_file() or the boxdumper, remuxer, or muxer tools, causing use-after-free, heap corruption, and crashes.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
双重释放
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
l-smash l-smash 0 ~ 2.14.5 -

II. Public POCs for CVE-2026-110599

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III. Intelligence Information for CVE-2026-110599

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Other References for CVE-2026-110599 (2)

IV. Related Vulnerabilities

Same product: l-smash
Same vendor: l-smash
Same weakness: CWE-415

V. Comments for CVE-2026-110599

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