CVE-2026-121994
Awaiting Analysis
Awaiting Analysis - Queue
Stack Buffer Overflow in GDB Remote Protocol Handler
Vulnerability report for CVE-2026-121994, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.
Publication date: 2026-11-05
Last updated on: 2026-11-05
Assigner: redhat-SADP
Description
Description
A stack buffer overflow in the GDB client's remote protocol handler allows an attacker-controlled debug target to execute arbitrary code in the GDB process. The vulnerability exists in fetch_register_using_p, which decodes a stub's register reply into an alloca-sized buffer without bounding writes by the register width.
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| Red Hat | Red Hat Enterprise Linux 10 | * |
| Red Hat | Red Hat Enterprise Linux 6 | * |
| Red Hat | Red Hat Enterprise Linux 7 | * |
| Red Hat | Red Hat Enterprise Linux 8 | * |
| Red Hat | Red Hat Enterprise Linux 9 | * |
| Red Hat | Red Hat Hardened Images | * |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-121 | A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). |
