CVE-2026-121997 (GCVE-0-2026-121997)

Vulnerability from cvelistv5 – Published: 2026-11-05 16:08 – Updated: 2026-11-05 19:01
VLAI
Title
Gdb: gdbserver: heap buffer overflow in cmd_qtdpsrc via qtdpsrc declared/actual length mismatch
Summary
A heap buffer overflow in gdbserver's QTDPsrc packet handler allows an unauthenticated remote attacker to achieve native code execution in the gdbserver process. The vulnerability results from a mismatch between a packet's declared source length and the actual data length, causing hex2bin to write beyond the allocated heap buffer.
Severity
8.1 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-11-05 17:24 UTC
CWE
  • CWE-122 - Heap-based Buffer Overflow
Assigner
redhat CNA under the redhat root
CNA scorecard B 82/100 over 1111 records in the last 180 days details
References
URL Tags
https://access.redhat.com/security/cve/CVE-2026-121997 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2565679 issue-trackingx_refsource_REDHAT
Impacted products
Date Public
2026-11-05 14:29
Credits
Red Hat would like to thank Pulkit Singh Singaria for reporting this issue.
Show details on NVD website
To clipboard 

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