CVE-2026-33165
Medium
Description
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.
SeverityMedium
CVSS5.5
Exploit probability—
ProductStruktur Libde265
PublishedMar 20, 2026
First seenMar 20, 2026
Weakness typeCWE-787Out-of-bounds write
How to fix
Update
- struktur libde2651.0.17 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| struktur libde265 | v < 1.0.17 | 1.0.17 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.