Buffer overflow in Red Hat Enterprise Linux 10
CVE-2026-121995
A stack buffer overflow in the GDB client's tracepoint upload handler allows an attacker-controlled debug stub to corrupt stack memory automatically during connection setup. The overflow results from GDB reading beyond the current reply boundary into a stale prior reply in the shared packet buffer.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-121995 (vdb-entry)
- RHBZ#2565677 (issue-tracking)
Frequently asked questions
- What is CVE-2026-121995?
- CVE-2026-121995 is a high-severity vulnerability in Red Hat Enterprise Linux 10, classified under Stack-based Buffer Overflow. CVSS score: 7.5/10. Published 2026-11-05.
- How severe is CVE-2026-121995?
- High severity. CVSS v3 base score is 7.5 out of 10.