What is CVE-2025-8277?

CVE-2025-8277 is a low-severity vulnerability in Red Hat Enterprise Linux 10, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 3.1/10. Published 2025-09-09.

How severe is CVE-2025-8277?

Low severity. CVSS v3 base score is 3.1 out of 10.

Vulnerability in Red Hat Enterprise Linux 10

CVE-2025-8277

A flaw was found in libssh's handling of key exchange (KEX) processes when a client repeatedly sends incorrect KEX guesses. The library fails to free memory during these rekey operations, which can gradually exhaust system memory. This iss…

EPSS: 0.004 (29.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

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

Affected products

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

References

secalert@redhat.com (x_refsource_REDHAT, vdb-entry)
secalert@redhat.com (x_refsource_REDHAT, issue-tracking)
secalert@redhat.com
secalert@redhat.com (x_refsource_REDHAT, vendor-advisory)

Frequently asked questions

What is CVE-2025-8277?: CVE-2025-8277 is a low-severity vulnerability in Red Hat Enterprise Linux 10, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 3.1/10. Published 2025-09-09.
How severe is CVE-2025-8277?: Low severity. CVSS v3 base score is 3.1 out of 10.