CVE-2026-49295: CWE-787: Out-of-bounds Write in strukturag libde265
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.
AI Analysis
Technical Summary
CVE-2026-49295 is an out-of-bounds write vulnerability in libde265 prior to version 1.0.20. The vulnerability arises in the decoder_context::process_reference_picture_set() function where a crafted H.265 bitstream can cause the combined count of predicted short-term reference picture set entries to exceed the size of the PocStFoll array (16 entries). Although individual list sizes are validated, the aggregate count is not, resulting in a write at index 16, which is out-of-bounds. This can lead to memory corruption with potential denial of service or other impacts. The issue is fixed in libde265 version 1.0.20.
Potential Impact
The vulnerability can cause an out-of-bounds write leading to memory corruption. According to the CVSS score of 7.1 (high severity), the impact includes potential denial of service (application crash) and limited integrity loss. There is no confidentiality impact reported. Exploitation requires user interaction (UI:R) but no privileges. The vulnerability is remotely exploitable over the network via a crafted H.265 bitstream.
Mitigation Recommendations
A fix is available in libde265 version 1.0.20. Users and maintainers should upgrade to version 1.0.20 or later to remediate this vulnerability. No vendor advisory is provided to indicate alternative mitigations or workarounds.
CVE-2026-49295: CWE-787: Out-of-bounds Write in strukturag libde265
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.
CVSS v3.1
Score 7.1high
Affected software
pkg:github/strukturag/libde265Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-49295 is an out-of-bounds write vulnerability in libde265 prior to version 1.0.20. The vulnerability arises in the decoder_context::process_reference_picture_set() function where a crafted H.265 bitstream can cause the combined count of predicted short-term reference picture set entries to exceed the size of the PocStFoll array (16 entries). Although individual list sizes are validated, the aggregate count is not, resulting in a write at index 16, which is out-of-bounds. This can lead to memory corruption with potential denial of service or other impacts. The issue is fixed in libde265 version 1.0.20.
Potential Impact
The vulnerability can cause an out-of-bounds write leading to memory corruption. According to the CVSS score of 7.1 (high severity), the impact includes potential denial of service (application crash) and limited integrity loss. There is no confidentiality impact reported. Exploitation requires user interaction (UI:R) but no privileges. The vulnerability is remotely exploitable over the network via a crafted H.265 bitstream.
Mitigation Recommendations
A fix is available in libde265 version 1.0.20. Users and maintainers should upgrade to version 1.0.20 or later to remediate this vulnerability. No vendor advisory is provided to indicate alternative mitigations or workarounds.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-28T20:07:58.862Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a35a6559187273676667ac5
Added to database: 06/19/2026, 20:28:05 UTC
Last enriched: 06/26/2026, 21:45:36 UTC
Last updated: 08/04/2026, 12:46:13 UTC
Views: 95
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