What is CVE-2025-26466?

CVE-2025-26466 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.9/10. Published 2025-02-28.

How severe is CVE-2025-26466?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Is CVE-2025-26466 known to be exploited?

14 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Resource exhaustion in Red Hat Enterprise Linux 10

CVE-2025-26466

A flaw was found in the OpenSSH package. For each ping packet the SSH server receives, a pong packet is allocated in a memory buffer and stored in a queue of packages. It is only freed when the server/client key exchange has finished. A ma…

EPSS: 0.624 (98.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

Affected products

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

Public proof-of-concept exploits

References

access.redhat.com/security/cve/CVE-2025-26466 (vdb-entry, x_refsource_REDHAT)
RHBZ#2345043 (issue-tracking, x_refsource_REDHAT)
seclists.org/oss-sec/2025/q1/144
www.qualys.com/2025/02/18/openssh-mitm-dos.txt

Frequently asked questions

What is CVE-2025-26466?: CVE-2025-26466 is a medium-severity vulnerability in Red Hat Enterprise Linux 10, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.9/10. Published 2025-02-28.
How severe is CVE-2025-26466?: Medium severity. CVSS v3 base score is 5.9 out of 10.
Is CVE-2025-26466 known to be exploited?: 14 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.