CVE-2026-110599 json
L-SMASH through 2.14.5 Double Free in HEVC and H.264 Importer Probe
published 2026-10-14 26 d ago modified 2026-10-15 25 d ago also EUVD-2026-101227
- cvss
- 7.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.2%
- EPSS 0.2% chance of exploitation in 30 days, percentile 15%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- no
- Technical impact
- partial
- Assessed
- 26 d ago
Exploit prediction
0.24% chance of exploitation in the next 30 days, higher than 15% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- hackmd.io https://hackmd.io/@haind-pwn/cve-2016-20099-2026-110599-l-smash-hevc-importer-double-free referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.9 | 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 |
| CNA | 3.1 | 7.1 | CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H |
| CNA | 4.0 | 6.9 | 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/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 |
Affected products
- l-smash l-smash
Classification
- Weakness
-
- CWE-415 Double Free
References
-
hackmd.io
/@haind-pwn/cve-2016-20099-2026-110599-l-smash-hevc-importer-double-free
exploit
-
hackmd.io
/@haind-pwn/l-smash-hevc-importer-double-free
third-party-advisory
-
github.com
/l-smash/l-smash/blob/v2.14.5/importer/nalu_imp.c#L1356-L1378
technical-description
-
github.com
/l-smash/l-smash/blob/v2.14.5/importer/nalu_imp.c#L697-L715
technical-description
-
vulncheck.com
/advisories/l-smash-through-2.14.5-double-free-in-hevc-and-h-264-importer-probe
third-party-advisory
Sources
- CVE List CVE-2026-110599
- NVD CVE-2026-110599
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.