Buffer Under-read Affecting glibc 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-UNMANAGED-GLIBC-16189087
- published24 Apr 2026
- disclosed20 Apr 2026
- creditUnknown
Introduced: 20 Apr 2026
CVE-2026-5928 (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 Buffer Under-read through the ungetwc() function when handling wide characters encoded in a character set with overlapping single-byte and multi-byte encodings. An attacker can cause unintentional disclosure of neighboring heap data or trigger a program crash by supplying specially crafted input to exploit the buffer under-read condition. This is only exploitable if the input character encoding allows overlaps between single-byte and multi-byte representations, which does not occur in standard Unicode character sets.