Vulnerability · Published Jun 19, 2026 · Assigned by GitHub_M
CVE-2026-49295libde265 has an out-of-bounds write in process_reference_picture_set via predicted short-term RPS
High 7.1
In plain English
A high-severity out-of-bounds write in libde265 from strukturag. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
libde265 is an open source implementation of the h.265 video codec. Prior to version 1.0.20, a crafted H.265 bitstream can cause an out-of-bounds array write in `decoder_context::process_reference_picture_set()` (`libde265/decctx.cc:1376`). The root cause is a missing aggregate bound check on predicted short-term reference picture set entries. Individual list sizes are validated, but the combined count after predicted RPS construction can exceed the 16-entry `PocStFoll` array, writing at index 16. Version 1.0.20 patches the issue.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | libde265 | 1.1.3-r0 | ALPINE-CVE-2026-49295 |
| Debian:12 | libde265 | 1.0.11-1+deb12u3 | DEBIAN-CVE-2026-49295 |
| Debian:13 | libde265 | 1.0.15-1+deb13u1 | DEBIAN-CVE-2026-49295 |
| Debian:14 | libde265 | 1.1.1-1 | DEBIAN-CVE-2026-49295 |
| Ubuntu:24.04:LTS | libde265 | 1.0.15-1ubuntu0.1 | USN-8573-1 |
| Ubuntu:24.04:LTS | libde265 | 1.0.15-1ubuntu0.1 | UBUNTU-CVE-2026-49295 |
| Ubuntu:25.10 | libde265 | no fix listed | UBUNTU-CVE-2026-49295 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| strukturag | libde265 | < 1.0.20 |
Weakness: CWE-787 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H