CVE-2026-49295: libde265 has an out-of-bounds write in process_reference_picture_set via predicted short-term RPS
Last updated 17 July 2026
Other sources
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 decodercontext::processreferencepictureset() (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.
— MITRE
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/libde265to a version that resolves this vulnerability.Fixed in 1.1.1-1 - Upgrade
Upgrade
libde265to a version that resolves this vulnerability.Fixed in 1.0.20
Event History
Frequently Asked Questions
What is the severity of CVE-2026-49295?
The severity of CVE-2026-49295 is rated as high with a score of 7.1.
How do I fix CVE-2026-49295?
To fix CVE-2026-49295, update to libde265 version 1.0.20 or later.
What causes CVE-2026-49295?
CVE-2026-49295 is caused by an out-of-bounds write due to a missing aggregate bound check in the process_reference_picture_set function.
Which software is affected by CVE-2026-49295?
CVE-2026-49295 affects the libde265 library, specifically versions prior to 1.0.20.
What type of vulnerability is CVE-2026-49295 classified as?
CVE-2026-49295 is classified as an out-of-bounds write vulnerability.