Gnutls: gnutls: information disclosure via heap overread in rsa key exchange
gnutls is listed across many Red Hat products, including RHEL 6 through 10 and OpenShift. CVSS scores it 8.2 (high). The fix is gnutls 3.8.10-4.el9_8.
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- How many real-world setups can hit the bug, from the vendor's advisory and CISA data. It does not know your setup.What do these mean? →
- Unclear
- Fix
- Fixed in 3.8.10-4.el9_8
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
- Exploitation: none
- Automatable: yes
- Technical impact: partial
Summary
A flaw was found in libgnutls. A remote attacker, by sending an extremely short premaster secret during an RSA key exchange to a server using an RSA key backed by a PKCS#11 token, could trigger a short heap overread. This memory corruption vulnerability could lead to information disclosure.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: yes · Technical impact: partial
- Record last updated
Affected versions
- gnutls
0
- gnutls
Version range not reported
- gnutls
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- gnutls
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- gnutls
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- libtasn1
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- gnutls
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- libtasn1
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- gnutls
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- libtasn1
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- gnutls
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- libtasn1
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- gnutls
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- libtasn1
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- gnutls
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- libtasn1
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- gnutls
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- gnutls
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- gnutls
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- gnutls
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- openshift/ose-rhel-coreos-8
Version range not reported
- openshift/ose-rhel-coreos-9
Version range not reported
- openshift/ose-rhel-coreos-9
Version range not reported
- openshift/ose-rhel-coreos-9
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- openshift/ose-rhel-coreos-9
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- openshift/ose-rhel-coreos-9
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- openshift/ose-rhel-coreos-9
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- openshift/ose-rhel-coreos-9
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- openshift/ose-rhel-coreos-9
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- openshift/ose-rhel-coreos-9
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- openshift/ose-rhel-coreos-9
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- cert-manager/jetstack-cert-manager-acmesolver-rhel9
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- cert-manager/jetstack-cert-manager-rhel9
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- cert-manager/cert-manager-operator-rhel9
Version range not reported
- cert-manager/cert-manager-operator-bundle
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- cert-manager/jetstack-cert-manager-acmesolver-rhel9
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- cert-manager/jetstack-cert-manager-rhel9
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- cert-manager/cert-manager-istio-csr-rhel9
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- cert-manager/cert-manager-operator-rhel9
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- cert-manager/cert-manager-operator-bundle
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- cert-manager/cert-manager-trust-manager-rhel9
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- discovery/discovery-server-rhel9
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- discovery/discovery-ui-rhel9
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- gnutls-main
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- rhai/base-image-neuron-rhel9
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- rhui5/cds-rhel9
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- rhui5/haproxy-rhel9
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- rhui5/installer-rhel9
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- rhui5/rhua-rhel9
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- rhui5/cds-kubernetes-tp-rhel9
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- rhui5/installer-tp-rhel9
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- rhui5/rhua-tp-rhel9
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- gnutls
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- gnutls
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- openshift4/ose-hypershift-rhel9
Version range not reported
- openshift/ose-rhel-coreos-9
Version range not reported
References 25
access.redhat.com
- errata/RHSA-2026:13274
- errata/RHSA-2026:20611
- errata/RHSA-2026:20612
- errata/RHSA-2026:20613
- errata/RHSA-2026:26319
- errata/RHSA-2026:26409
- errata/RHSA-2026:29197
- errata/RHSA-2026:30004
- errata/RHSA-2026:30849
- errata/RHSA-2026:30850
- errata/RHSA-2026:32962
- errata/RHSA-2026:33125
- errata/RHSA-2026:40762
- errata/RHSA-2026:41921
- errata/RHSA-2026:56853
- errata/RHSA-2026:57483
- errata/RHSA-2026:58981
- errata/RHSA-2026:59831
- errata/RHSA-2026:60019
- errata/RHSA-2026:67837
- errata/RHSA-2026:72502
- errata/RHSA-2026:74674
- errata/RHSA-2026:77320
- errata/RHSA-2026:82304
- errata/RHSA-2026:82322
Questions about CVE-2026-5260
What should I do about it?
Update gnutls to the fixed build 3.8.10-4.el9_8 or later, as shipped in gnutls-3.8.10-4.el9_8.src.rpm. The available facts list no workaround.Source: access.redhat.com
Is it being exploited?
It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data