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.
| Product | Vendor Advisory | Solution File | Added | Published |
|---|---|---|---|---|
| Alpine Linux | — | Upgrade libde265 | Jun 18, 2026 | Mar 20, 2026 |
| Amazon_linux_2023 | — | Upgrade libde265-debuginfoUpgrade libde265Upgrade libde265-develUpgrade libde265-debugsource | Apr 14, 2026 | Mar 20, 2026 |
| Debian | — | Upgrade libde265 | Apr 28, 2026 | Apr 28, 2026 |
| Ubuntu | — | Upgrade libde265-devUpgrade libde265-0Upgrade libde265-dev (Ubuntu Pro)No solution existsUpgrade libde265-0 (Ubuntu Pro) | Jul 21, 2026 | Jul 20, 2026 |
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