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 issue can lead to crashes on the client side, particularly when using libgcrypt, which impacts application stability and availability.

EPSS: 0.004 (30.1th 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.