Untrusted Pointer Dereference Affecting gdb-gdbserver package, versions *


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.47% (41st percentile)

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  • Snyk IDSNYK-RHEL7-GDBGDBSERVER-22346305
  • published8 Nov 2026
  • disclosed5 Nov 2026

Introduced: 5 Nov 2026

NewCVE-2026-121996  (opens in a new tab)
CWE-822  (opens in a new tab)

How to fix?

There is no fixed version for RHEL:7 gdb-gdbserver.

NVD Description

Note: Versions mentioned in the description apply only to the upstream gdb-gdbserver package and not the gdb-gdbserver package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

A length validation flaw in gdbserver's agent-expression parser allows an unauthenticated remote attacker to read uninitialized heap memory from the gdbserver process and cause a denial of service. Disclosed heap content includes addresses suitable for defeating ASLR in further exploitation.

CVSS Base Scores

version 3.1