CVE-2026-110599
L-SMASH through 2.14.5 Double Free in HEVC and H.264 Importer Probe
CVSS Score
7.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-415 |
| Vendor | l-smash |
| Product | l-smash |
| Published | Oct 14, 2026 |
| Last Updated | Oct 14, 2026 |
Stay Ahead of the Next One
Get instant alerts for l-smash l-smash
Be the first to know when new high vulnerabilities affecting l-smash l-smash are published — delivered to Slack, Telegram or Discord.
Get Free Alerts →
Free · No credit card · 60 sec setup
CVSS v3 Breakdown
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H Attack Vector
Local
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High
Affected Versions
l-smash / l-smash
0 ≤ 2.14.5
References
hackmd.io: https://hackmd.io/@haind-pwn/l-smash-hevc-importer-double-free github.com: https://github.com/l-smash/l-smash/blob/v2.14.5/importer/nalu_imp.c#L1356-L1378 github.com: https://github.com/l-smash/l-smash/blob/v2.14.5/importer/nalu_imp.c#L697-L715 vulncheck.com: https://www.vulncheck.com/advisories/l-smash-through-2.14.5-double-free-in-hevc-and-h-264-importer-probe hackmd.io: https://hackmd.io/@haind-pwn/cve-2016-20099-2026-110599-l-smash-hevc-importer-double-free
Credits
HaiND from the Post and Telecommunication Institute of Technology