PT-2026-36270 · Julia · Libde265 Jll

Published 2026-04-20 · Updated 2026-04-20

OSV

CVSS v3.1

5.5

Medium

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

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.

Fix

Related Identifiers

JLSEC-2026-159

Affected Products

Libde265 Jll

References · 4

• https://osv.dev/vulnerability/JLSEC-2026-159 · Vendor Advisory
• https://github.com/strukturag/libde265/releases/tag/v1.0.17 · Note
• https://github.com/strukturag/libde265/security/advisories/GHSA-653q-9f73-8hvg · Note
• https://github.com/strukturag/libde265/commit/c7891e412106130b83f8e8ea8b7f907e9449b658 · Note