CVE-2026-33165
published 2026-03-20CVE-2026-33165: 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…
PriorityP420medium5CVSS 3.1
AVLACLPRLUIRSUCNINAH
EPSS
0.24%
15.0th percentile
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.
Affected
5 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | libde265 | < libde265 1.0.18-1 (forky) | libde265 1.0.18-1 (forky) |
| struktur | libde265 | < 1.0.17 | 1.0.17 |
| struktur | libde265 | >= 0 < 1.0.18-1 | 1.0.18-1 |
| strukturag | libde265 | < 1.0.17 | 1.0.17 |
| ubuntu | libde265 | — | — |
CVSS provenance
nvdv3.15.0MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H
osv5.0MEDIUM
vendor_debian5.5MEDIUM
vendor_ubuntu3.3LOW
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Ubuntu
libde265 vulnerabilities
vendor_ubuntu·2026-07-20·CVSS 3.3
CVE-2026-45382 [LOW] libde265 vulnerabilities
Title: libde265 vulnerabilities
Summary: Several security issues were fixed in libde265.
It was discovered that libde265 did not properly manage memory under
certain circumstances. An attacker could possibly use this issue to
cause libde265 to crash, resulting in a denial of service. This issue
only affected Ubuntu 22.04 LTS. (CVE-2023-51792)
It was discovered that libde265 did not properly handle certain
malformed media files, leading to a heap buffer overflow. An attacker
could possibly use this issue to cause libde265 to crash, resulting in
a denial of service. (CVE-2024-38949, CVE-2024-38950)
It was discovered that libde265 did not properly handle certain
malformed input, leading to a segmentation fault. An attacker could
possibly use this issue to cause libde265 to crash, resultin
Debian
CVE-2026-33165: libde265 - libde265 is an open source implementation of the h.265 video codec. Prior to ver...
vendor_debian·2026·CVSS 5.5
CVE-2026-33165 [MEDIUM] CVE-2026-33165: libde265 - libde265 is an open source implementation of the h.265 video codec. Prior to ver...
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.
Scope: local
bookworm: open
bullseye: open
forky: resolved (fixed in 1.0.18-1)
sid: resolved (fixed in 1.0.18-1)
trixie: open
OSV
CVE-2026-33165: libde265 is an open source implementation of the h
osv·2026-03-20·CVSS 5.0
CVE-2026-33165 [MEDIUM] CVE-2026-33165: libde265 is an open source implementation of the 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.
No detection rules found.
No public exploits indexed.
2026-03-20
Published