CVE-2026-110599
L-SMASH through 2.14.5 Double Free in HEVC and H.264 Importer Probe
- State
- Published
- Severity
- 6.9 Medium
- Published
- Oct 14, 2026
- Updated
- Oct 14, 2026
- Reserved
- Oct 14, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.9 Medium | CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.1 High | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H | VulnCheck |
Weaknesses
- CWE-415 Double Free
Affected Products
| Product | Versions |
|---|---|
l-smashl-smash |
|
References
- https://hackmd.io/@haind-pwn/l-smash-hevc-importer-double-freethird-party-advisory
- https://github.com/l-smash/l-smash/blob/v2.14.5/importer/nalu_imp.c#L1356-L1378technical-description
- https://github.com/l-smash/l-smash/blob/v2.14.5/importer/nalu_imp.c#L697-L715technical-description
- VulnCheck Advisory: L-SMASH through 2.14.5 Double Free in HEVC and H.264 Importer Probethird-party-advisory
- https://hackmd.io/@haind-pwn/cve-2016-20099-2026-110599-l-smash-hevc-importer-double-freeexploit
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