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Back to active CVEs
Unknown severity · Source severity not reportedCVE-2026-123151

Gdb: gdb: stack buffer overflow in parse_tsv_definition via stale rs->buf tailCVE-2026-123151

Answer in brief

CVE-2026-123151 records a Unknown severity vulnerability in Gdb: gdb: stack buffer overflow in parse_tsv_definition via stale rs->buf tail. The current sources do not mark it as known exploited. The current feed maps Red Hat/gdb (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 5, 2026Updated Nov 5, 2026Source checked Nov 5, 2026First seen by HOL Nov 5, 2026Material review Nov 5, 2026
Upstream Advisory

Key facts

Risk
Unknown severitySource severity not reported
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Red Hat/gdb (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Red Hat/gdbgeneric*Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Red Hat/gdb.
  2. 2Review the reported fix. Source-reported workaround: There is no mitigation for this vulnerability. Users should only connect GDB to trusted debug targets.

Evidence timeline and material changes

  1. Published upstream

    Nov 5, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 5, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 5, 2026

Sources and claim methodology

  • Source referenceaccess.redhat.com
  • Source referencebugzilla.redhat.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Gdb: gdb: stack buffer overflow in fetch_register_using_p via unchecked p-reply lengthSame red hat/gdb package
  • Gdb: gdb: stack buffer overflow in parse_tracepoint_definition via stale rs->buf tailSame red hat/gdb package
  • Gdb: gdbserver: heap disclosure and wild pointer in gdb_parse_agent_expr via untrusted agent-expression lengthSame red hat/gdb package
  • Gdb: gdbserver: heap buffer overflow in cmd_qtdpsrc via qtdpsrc declared/actual length mismatchSame red hat/gdb package
  • SDL_mixer 3.1.2 through 3.2.4 Stack-based Buffer Overflow via FetchXLaw() in WAV DecoderAlso CWE-121
  • SDL_mixer 3.1.2 through 3.2.4 Stack-based Buffer Overflow via FetchXLaw() in AIFF DecoderAlso CWE-121

Record context

Vulnerability class
Buffer Overflow
EPSS
Not reported
CWE IDs
CWE-121
Source
CVE List V5
Source checked
Nov 5, 2026
References
2 linked sources
Open source record