Gdb: gdbserver: heap disclosure and wild pointer in gdb_parse_agent_expr via untrusted agent-expression length
? CVE-2026-121996 · score 8.2/10
What could go wrong?
Microsoft fixed a security weakness. Details are limited to avoid helping attackers.
How urgent is it?
Check Microsoft’s page for details.
Who is affected?
azl3 crash 9.0.0-3 on Azure Linux 3.0, azl3 gdb 13.2-11 on Azure Linux 3.0
What should I do?
Install this month’s updates via Windows Update, Intune or your update tool, then restart.
Known problems
Microsoft lists known issues per update: no KB article listed. Official page.