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.
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Advisories
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Fixes
Solution
No solution given by the vendor.
Workaround
There is no mitigation for this vulnerability. Users should only connect GDB to trusted debug targets.
References
History
Fri, 06 Nov 2026 00:15:00 +0000
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threat_severity
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Thu, 05 Nov 2026 16:30:00 +0000
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| 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. | |
| Title | Gdb: gdb: stack buffer overflow in fetch_register_using_p via unchecked p-reply length | |
| First Time appeared |
Redhat
Redhat enterprise Linux Redhat hummingbird Redhat rhel Els |
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| Weaknesses | CWE-121 | |
| CPEs | cpe:/a:redhat:enterprise_linux:10 cpe:/a:redhat:enterprise_linux:8 cpe:/a:redhat:enterprise_linux:9 cpe:/a:redhat:hummingbird:1 cpe:/o:redhat:rhel_els:6 cpe:/o:redhat:rhel_els:7 |
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| Vendors & Products |
Redhat
Redhat enterprise Linux Redhat hummingbird Redhat rhel Els |
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| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: redhat
Published:
Updated: 2026-11-06T04:56:37.588Z
Reserved: 2026-11-04T13:28:12.838Z
Link: CVE-2026-121994
No data.
Status : Awaiting Analysis
Published: 2026-11-05T17:18:00.503
Modified: 2026-11-06T05:18:23.807
Link: CVE-2026-121994
OpenCVE Enrichment
Updated: 2026-11-05T17:45:06Z
Weaknesses