High [CVE-2026-60002] Use-after-free vulnerability during host key re-exchange on the client side
This high-severity Red Hat Linux advisory covers CVE-2026-60002 affecting Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4.22.
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Summary
ssh in OpenSSH before 10.4 can have a use-after-free when a server changes its host key during a key re-exchange. (This outcome occurs only on the client side.) A flaw was found in OpenSSH. This could lead to high impact on confidentiality and integrity, and low impact on availability.
Red Hat severity: Important — CVSS 7.7 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:L). Weakness: CWE-825.
Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 9; Red Hat OpenShift Container Platform 4.22; Red Hat Hardened Images; Red Hat Update Infrastructure 5; Red Hat OpenShift Container Platform 4. Red Hat lists Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8 as not affected.
Red Hat fixing advisory: RHSA-2026:47757, RHSA-2026:47756, RHSA-2026:54769, RHSA-2026:37382, RHSA-2026:54387.
Affected products named by the advisory: Red Hat package: openssh.
- < 10.4
Official advisory · high-confidence parse· fetched 3 hours ago·verify at source
- openssh-0:9.9p1-25.el10_2
- openssh-0:9.9p1-9.el9_8
- rhcos-4.22.9.8.202608130832-0
- openssh-main-10.4p1-1.hum1
- rhui5/installer-rhel9:1786435483
- rhui5/rhua-rhel9:1786533529
- RHSA-2026:47757
- RHSA-2026:47756
- RHSA-2026:54769
- RHSA-2026:37382
- RHSA-2026:54387
Official advisory · high-confidence parse· fetched 3 hours ago·verify at source
Mitigation checklist
- To mitigate this issue, OpenSSH clients should only connect to trusted SSH servers. Enforcing strict host key checking and carefully managing `known_hosts` files can help prevent connections to servers with unexpected or altered host keys, thereby reducing exposure to this client-side vulnerability.
Official advisory · high-confidence parse· fetched 3 hours ago·verify at source
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