Bug 2562933 (CVE-2026-115455) - CVE-2026-115455 gcc: Stack overflow in std::bitset on libstdc++
Summary: CVE-2026-115455 gcc: Stack overflow in std::bitset on libstdc++
Keywords:
Status: NEW
Alias: CVE-2026-115455
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2563073 2563074 2563076 2563075
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-10-28 15:47 UTC by OSIDB Bzimport
Modified: 2026-10-28 17:53 UTC (History)
20 users (show)

Fixed In Version:
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Last Closed:
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Description OSIDB Bzimport 2026-10-28 15:47:14 UTC 
There's a Stack corruption in std::bitset stream extraction in libstdc++. The __builtin_alloca argument didn't account for the size or alignment of wide characters resulting in a stack buffer overflow.
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