Out-of-bounds Write Affecting libde265 package, versions [0,]
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-CONAN-LIBDE265-15798528
- published28 Mar 2026
- disclosed20 Mar 2026
- creditkapnull
Introduced: 20 Mar 2026
CVE-2026-33165 (opens in a new tab)How to fix?
A fix was pushed into the master branch but not yet published.
Overview
Affected versions of this package are vulnerable to Out-of-bounds Write through the set_SliceHeaderIndex process. An attacker can cause a write operation to occur past the end of a heap allocation by submitting a specially crafted HEVC bitstream that manipulates the log2unitSize value after an SPS change, while keeping PicWidthInCtbsY and PicHeightInCtbsY constant but altering Log2CtbSizeY.