Red Hat

CVE-2026-123151: A flaw was found in the GNU debugger (GDB). When GDB connects to a remote debug target, a malicious target can cause GDB to overflow a buffer on the stack while

CVE-2026-123151 Nov 5, 2026 Source: Vendor

A flaw was found in the GNU debugger (GDB). When GDB connects to a remote debug target, a malicious target can cause GDB to overflow a buffer on the stack while parsing the target's replies. This can crash GDB or potentially allow the target to execute arbitrary code in the GDB client process with the privileges of the user running GDB.

Source of record The credited names below are quoted verbatim from the vendor's own advisory: https://nvd.nist.gov/vuln/detail/CVE-2026-123151

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CVE-2026-123151 BR2026-0000-042638 unclaimed

Credited as Red Hat would like to thank Pulkit Singh Singaria for reporting this issue