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

Quick assessment

Affected

Red Hat Red Hat Enterprise Linux 10

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 GCC 的 libstdc++ 库中发现了一个漏洞。当应用程序从宽字符流中提取数据到 bitset 时，内部栈内存分配未能正确考虑字符大小和对齐要求。能够向受影响应用程序提供特制输入的攻击者可触发基于栈的缓冲区溢出，从而导致拒绝服务（DoS）。

CVSS 6.5 · Medium Updated Oct 30, 2026

Possible ATT&CK Techniques 2 AI

T1190 · Exploit Public-Facing Application T1562.004

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Vulnerability Information

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Vulnerability Title

Gcc: stack overflow in std::bitset on libstdc++

Source: CVE Program / CVE List V5

Vulnerability 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).

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

跨界内存写

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE
Red Hat	Red Hat Enterprise Linux 10	-	`cpe:/o:redhat:enterprise_linux:10`
Red Hat	Red Hat Enterprise Linux 10	-	`cpe:/o:redhat:enterprise_linux:10`
Red Hat	Red Hat Enterprise Linux 10	-	`cpe:/o:redhat:enterprise_linux:10`
Red Hat	Red Hat Enterprise Linux 10	-	`cpe:/o:redhat:enterprise_linux:10`
Red Hat	Red Hat Enterprise Linux 6	-	`cpe:/o:redhat:enterprise_linux:6`
Red Hat	Red Hat Enterprise Linux 6	-	`cpe:/o:redhat:enterprise_linux:6`
Red Hat	Red Hat Enterprise Linux 6	-	`cpe:/o:redhat:enterprise_linux:6`
Red Hat	Red Hat Enterprise Linux 6	-	`cpe:/o:redhat:enterprise_linux:6`
Red Hat	Red Hat Enterprise Linux 6	-	`cpe:/o:redhat:enterprise_linux:6`
Red Hat	Red Hat Enterprise Linux 7	-	`cpe:/o:redhat:enterprise_linux:7`
Red Hat	Red Hat Enterprise Linux 7	-	`cpe:/o:redhat:enterprise_linux:7`
Red Hat	Red Hat Enterprise Linux 7	-	`cpe:/o:redhat:enterprise_linux:7`
Red Hat	Red Hat Enterprise Linux 7	-	`cpe:/o:redhat:enterprise_linux:7`
Red Hat	Red Hat Enterprise Linux 8	-	`cpe:/o:redhat:enterprise_linux:8`
Red Hat	Red Hat Enterprise Linux 8	-	`cpe:/o:redhat:enterprise_linux:8`
Red Hat	Red Hat Enterprise Linux 8	-	`cpe:/o:redhat:enterprise_linux:8`
Red Hat	Red Hat Enterprise Linux 8	-	`cpe:/o:redhat:enterprise_linux:8`
Red Hat	Red Hat Enterprise Linux 9	-	`cpe:/o:redhat:enterprise_linux:9`
Red Hat	Red Hat Enterprise Linux 9	-	`cpe:/o:redhat:enterprise_linux:9`
Red Hat	Red Hat Enterprise Linux 9	-	`cpe:/o:redhat:enterprise_linux:9`
Red Hat	Red Hat Enterprise Linux 9	-	`cpe:/o:redhat:enterprise_linux:9`
Red Hat	Red Hat Enterprise Linux 9	-	`cpe:/o:redhat:enterprise_linux:9`
Red Hat	Red Hat Hardened Images	-	`cpe:/a:redhat:hummingbird:1`
Red Hat	Red Hat Hardened Images	-	`cpe:/a:redhat:hummingbird:1`
Red Hat	Red Hat OpenShift Container Platform 4	-	`cpe:/a:redhat:openshift:4`
Red Hat	Red Hat OpenShift Container Platform 4	-	`cpe:/a:redhat:openshift:4`
Red Hat	Red Hat OpenShift Container Platform 5	-	`cpe:/a:redhat:openshift:5`

II. Public POCs for CVE-2026-115455

#	POC Description	Source Link	Shenlong Link

AI-Generated POC Premium

No public POC found.

III. Intelligence Information for CVE-2026-115455

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Other References for CVE-2026-115455 (3)

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

https://www.cve.org/CVERecord?id=CVE-2026-115455

Same Patch Batch · Red Hat · 2026-10-30 · 13 CVEs total

CVE-2026-103963	7.5 HIGH	Glib-networking: unbounded tls 1.3 session ticket queue growth in glib-networking allows r
CVE-2026-118952	6.5 MEDIUM	Kroxylicious-authorizer-acl: kroxylicious: acl prefix matching can bypass authorization ru
CVE-2026-91920	6.5 MEDIUM	Undertow: undertow: chunkreader message length permits chunk-size overflow
CVE-2026-114690	6.2 MEDIUM	Gcc: confirmed out-of-bounds read/write in libstdc++ parallel `std
CVE-2026-114691	5.9 MEDIUM	Gcc: integer wrap in `std
CVE-2026-118593	5.9 MEDIUM	Kernel: local_bh imbalance in seg6_input_core() drop path (incomplete fix for cve-2026-460
CVE-2026-110133	5.8 MEDIUM	Ghostscript: heap buffer overflow in ghostscript truetype outliner due to npointstotal int
CVE-2026-118959	5.4 MEDIUM	Keycloak-services: keycloak-services: required actions bypassed via kc_action parameter
CVE-2026-118947	4.3 MEDIUM	Keycloak-services: keycloak-services: authorization bypass via uma resource registration i
CVE-2026-115456	3.7 LOW	Gcc: out-of-bounds read in std::from_chars
CVE-2026-118475	3.6 LOW	Eog: eye of gnome: buffer overrun when parsing malicious png files with non-standard iccp
CVE-2026-112922	3.3 LOW	Ghostscript: out-of-bounds read in ghostscript shade_next_color via integer overflow of in

IV. Related Vulnerabilities

Same product: Red Hat Enterprise Linux 10

Same vendor: Red Hat

Same weakness: CWE-787