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TI-2026-25595 Aliases CVE-2026-33165

heap out-of-bounds write in libde265 1.0.16

Priority MEDIUM 58CWE-787Published · Updated

Key facts

Attack vector
Local
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-787 and the CVSS impact.

Summary

libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.17, a crafted HEVC bitstream causes an out-of-bounds heap write confirmed by AddressSanitizer. The trigger is a stale ctb_info.log2unitSize after an SPS change where PicWidthInCtbsY and PicHeightInCtbsY stay constant but Log2CtbSizeY changes, causing set_SliceHeaderIndex to index past the allocated image metadata array and write 2 bytes past the end of a heap allocation. This issue has been patched in version 1.0.17.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00246 15th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed libde265 (strukturag): 1.0.17

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
strukturaglibde265before 1.0.171.0.17Patch availableCNA
  • libde265 Vendorstrukturag Affected before 1.0.17 Fixed in 1.0.17 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:struktur:libde265:*:*:*:*:*:*:*:*before 1.0.17Vulnerablestrukturag
  • cpe:2.3:a:struktur:libde265:*:*:*:*:*:*:*:* Versions before 1.0.17 Vulnerable ·strukturag

Remediation

  • Fix · CNA libde265 (strukturag) Fixed in 1.0.17

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-33165

References

Exploit 1

Patch 1

Other 1

  • TI-2026-25594 NULL Pointer Dereference in libde265 CVSS 4.0HIGH 8.7
  • TI-2023-27026 Libde265 v1.0.14 was discovered to contain a global buffer overflow vulnerability in the… CVSS 3.1HIGH 8.8
  • TI-2023-10674 Libde265 v1.0.10 was discovered to contain a heap-buffer-overflow vulnerability in the… CVSS 3.1HIGH 7.8
  • TI-2022-23669 Libde265 1.0.9 is vulnerable to Buffer Overflow in function void put_qpel_fallback<unsigned short> CVSS 3.1HIGH 7.8
  • TI-2023-23552 Libde265 v1.0.12 was discovered to contain multiple buffer overflows via the… CVSS 3.1HIGH 8.1
  • TI-2022-23679 Libde265 1.0.9 has a heap buffer overflow vulnerability in de265_image::set_SliceAddrRS(int, int, int) CVSS 3.1HIGH 7.8
See all 59 →

Sources

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