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CRITICAL

CVE-2025-68121

CVSS v3

10

CRITICAL

EPSS Score

0.9 %

exploit probability, as of 2026-10-11

CISA KEV

No

known exploited

Exploitation

—

SSVC status

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Affected and fixed versions

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • golangBitnamiall versions · fixed in 1.24.13
  • stdlibGoall versions · fixed in 1.24.13
  • aardvark-dnsAlmaLinux:8all versions · fixed in 2:1.10.1-2.module_el8.10.0+3901+4b80ecd7
  • buildahAlmaLinux:10all versions · fixed in 2:1.41.8-2.el10_1and 1 other package
  • buildahAlmaLinux:9all versions · fixed in 2:1.41.8-2.el9_7and 1 other package
  • buildahAlmaLinux:8all versions · fixed in 2:1.33.14-3.module_el8.10.0+4136+16425343and 1 other package
  • cockpit-podmanAlmaLinux:8all versions · fixed in 84.1-1.module_el8.10.0+4102+6c76e544
  • conmonAlmaLinux:8all versions · fixed in 3:2.1.10-1.module_el8.10.0+4068+0e21408f

53 more package ranges on OSV.dev

Vendor advisories

  • CVE-2025-68121 Red Hat Product Security8,196 products fixed · 187 known affected

    crypto/tls: crypto/tls: Incorrect certificate validation during TLS session resumption

    rhai/assisted-installer-rhel9 as a component of Assisted Installer for Red Hat OpenShift Container Platform 2 · build-of-trustee/trustee-rhel9-operator as a component of Confidential Compute Attestation · openshift-sandboxed-containers/osc-monitor-rhel9 as a component of Confidential Compute Attestation

  • RHSA-2026:76752 Red Hat Product Security2 products fixed

    Red Hat Security Advisory: OpenShift Security Profiles Operator bug fix and enhancement update

  • RHSA-2026:72805 Red Hat Product Security17 products fixed

    Red Hat Security Advisory: git-lfs security update

  • RHSA-2026:72737 Red Hat Product Security11 products fixed

    Red Hat Security Advisory: git-lfs security update

  • RHSA-2026:72276 Red Hat Product Security13 products fixed

    Red Hat Security Advisory: git-lfs security update

  • RHSA-2026:69235 Red Hat Product Security47 products fixed

    Red Hat Security Advisory: osbuild-composer security update

221 more advisories

Full record on NVD

Description

During session resumption in crypto/tls, if the underlying Config has its ClientCAs or RootCAs fields mutated between the initial handshake and the resumed handshake, the resumed handshake may succeed when it should have failed. This may happen when a user calls Config.Clone and mutates the returned Config, or uses Config.GetConfigForClient. This can cause a client to resume a session with a server that it would not have resumed with during the initial handshake, or cause a server to resume a session with a client that it would not have resumed with during the initial handshake.

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Published
2026-02-05
Last Modified
2026-04-29

Frequently asked questions

What is CVE-2025-68121?

During session resumption in crypto/tls, if the underlying Config has its ClientCAs or RootCAs fields mutated between the initial handshake and the resumed handshake, the resumed handshake may succeed when it should have failed. This may happen when a user calls Config.Clone and mutates the returned Config, or uses Config.GetConfigForClient. This can cause a client to resume a session with a server that it would not have resumed with during the initial handshake, or cause a server to resume a session with a client that it would not have resumed with during the initial handshake.

Is CVE-2025-68121 actively exploited?

Active exploitation of CVE-2025-68121 has not been confirmed. Its EPSS score was 0.9% on 2026-10-11, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2025-68121?

CVE-2025-68121 has a CVSS v3 base score of 10 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H.

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