CVE-2026-123151High· 7.5▾ TwilightA 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 ta…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the CISA ADP record, not NVD.
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.
crashgdb (all versions)gdb (all versions)gdb (all versions)crashgcc-toolset-14-gdbgcc-toolset-15-gdbgdb (all versions)crashgdb (all versions)gdb (all versions)Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
There is no mitigation for this vulnerability. Users should only connect GDB to trusted debug targets.
Connected by shared product, vendor, weakness, or advisory.
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