What’s Vulnerable › Vulnerabilities

CVE-2026-115455: Gcc: stack overflow in std::bitset on libstdc++

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-30 · updated 2026-10-30
• Weakness: CWE-787

Description

A flaw was found in GCC libstdc++. When an application extracts data into a bitset from a wide-character stream, internal stack memory allocation fails to properly account for character size and alignment. An attacker capable of supplying crafted input to an affected application could trigger a stack-based buffer overflow leading denial of service (DoS).

Affected products

• Red Hat Enterprise Linux 10: all versions
• Red Hat Hardened Images: all versions

References

• https://access.redhat.com/security/cve/CVE-2026-115455
• https://bugzilla.redhat.com/show_bug.cgi?id=2562933
• https://gcc.gnu.org/cgit/gcc/commit/?id=5d419c69ce2e6b86d7da75f18736904885674219

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