CVE-2026-123151: Stack-based Buffer Overflow
Source GCVE Database
Not known to be exploited.
Data as of 5 Nov 2026, 19:36 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
Thin evidence
One scorer or noneExploitation evidence
Disclosed: evidence found.
CVE published 5 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 5 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Red Hat Enterprise Linux 10crash | Affected– | Fixed in– |
| Red Hat Enterprise Linux 10gdb | Affected– | Fixed in– |
| Red Hat Enterprise Linux 6gdb | Affected– | Fixed in– |
| Red Hat Enterprise Linux 7gdb | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8crash | Affected– | Fixed in– |
| Red Hat Enterprise Linux 8gcc-toolset-14-gdb | Affected– | Fixed in– |
AI-suggested
There is no mitigation available for this vulnerability. Users are advised to only connect GDB to trusted remote debug targets to avoid exploitation.
Description
A stack-based buffer overflow vulnerability exists in the GNU debugger (GDB) when connecting to a remote debug target. A malicious remote target can trigger this overflow during the connection handshake, potentially causing GDB to crash or allowing arbitrary code execution with the privileges of the user running GDB. There is no available mitigation other than connecting only to trusted debug targets.