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TI-2026-74093 Aliases CVE-2026-110599GHSA-4h8q-hwh6-8jpj

Double free in L-SMASH HEVC and H.264 importer probe

Priority MEDIUM 64CWE-415Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Passive
Attack complexity
Low
Attack requirements
None
Impact type
—
Confidentiality · integrity · availability
None · High · High
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

Summary

L-SMASH through 2.14.5 contains a double free in hevc_setup_first_summary() and h264_setup_first_summary() in importer/nalu_imp.c, where error paths free codec-specific objects that the code does not own. An attacker who supplies a crafted Annex-B elementary stream without a parseable SPS to lsmash_read_file() or the boxdumper, remuxer, or muxer tools can trigger a double free (CWE-415) that causes use-after-free, heap corruption, and crashes.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Description from the CNA

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00243 15th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
l-smashl-smashup to 2.14.5—No fix listedCNA
  • l-smash Vendorl-smash Affected up to 2.14.5 Fixed in — No fix listed CNA

Remediation

The sources list no fixed version for L-SMASH.

Written with Claude Haiku 5.5 from the sources below · 2026-10-28

Timeline

  1. 2026-10-14 Threatist record created from CVE-2026-110599
  2. 2026-10-14 Alias added: GHSA-4h8q-hwh6-8jpj
  3. 2026-10-15 CISA SSVC decision points changed

References

Advisory 1

Other 2

  • TI-2016-09370 Infinite loop in L-SMASH VC-1 importer probe allows denial of service CVSS 4.0MEDIUM 6.8
  • TI-2026-83848 Heap out-of-bounds write in L-SMASH via hdlr and url boxes CVSS 4.0MEDIUM 6.9

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences