Buffer overflow in Struktur Libde265
CVE-2026-49295
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:H.
EPSS exploit prediction
EPSS: 0.003 (24.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 25th percentile — 24.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000
Affected products
- Struktur Libde265
- Strukturag Libde265 — versions < 1.0.20
Weakness classification (CWE)
References
- github.com/strukturag/libde265/security/advisories/GHSA-g2rg-wj66-w594 (Exploit, Mitigation, Vendor Advisory)
- github.com/strukturag/libde265/commit/691f3a3c55b3d32478c4a49895dee061a282652b (Patch)
Frequently asked questions
- What is CVE-2026-49295?
- CVE-2026-49295 is a high-severity vulnerability in Struktur Libde265, classified under Out-of-bounds Write. CVSS score: 7.1/10. Published 2026-06-19.
- How severe is CVE-2026-49295?
- High severity. CVSS v3 base score is 7.1 out of 10.