Bug 2563044 (CVE-2026-115456)

Summary: CVE-2026-115456 gcc: Out-of-bounds read in std::from_chars
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security <prodsec-ir-bot>
Status: NEW --- QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: akhatavk, aos-team-art-private, asdas, crizzo, dpaolell, gtanzill, jbuscemi, jdelft, jupierce, lgarciaa, mbiarnes, ppalepu, ppostler, prdhamdh, rhel-process-autobot, sghai, sidsharm, suppawar, vlaad, watson-tool-maintainers
Target Milestone: ---Keywords: Security
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Hardware: All   
OS: Linux   
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Doc Text:
A flaw was found in gcc. An attacker could cause a Denial of Service (DoS) by passing a string that is not null-terminated to the std::from_chars() function in the libstdc++ library. This issue triggers an out-of-bounds read beyond the allocated buffer, potentially leading to invalid data parsing or an application crash.
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On: 2563086, 2563088, 2563087, 2563090    
Bug Blocks:    

Description OSIDB Bzimport 2026-10-28 17:40:37 UTC 
There's a out-of-bounds read in std::from_chars() in libstdc++ when the string being passed as parameter is not NULL terminated. The impact is limited to read invalid float point numbers or reach a non-readable memory position resulting a a Denial-of-Service only.