Gnutls: gnutls: information disclosure via heap overread in rsa key exchange
Summary
| CVE | CVE-2026-5260 |
|---|---|
| State | PUBLISHED |
| Assigner | redhat |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-05-26 22:16:44 UTC |
| Updated | 2026-10-29 06:17:23 UTC |
| Description | 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. |
Risk And Classification
Primary CVSS: v3.1 8.2 HIGH from [email protected]
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
EPSS: 0.009450000 probability, percentile 0.606980000 (date 2026-10-22)
Problem Types: CWE-126 | CWE-126 Buffer Over-read
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 3.1 | [email protected] | Secondary | 8.2 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H |
| 3.1 | CNA | CVSS | 8.2 | HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H |
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
NoneUser Interaction
NoneScope
UnchangedConfidentiality
LowIntegrity
NoneAvailability
HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Red Hat | Red Hat Enterprise Linux 10 | unaffected 0:3.8.10-4.el10_2 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 10.0 Extended Update Support | unaffected 0:3.8.9-9.el10_0.19 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8 | unaffected 0:3.6.16-8.el8_10.6 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8 | unaffected 0:3.6.16-8.el8_10.6 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | unaffected 0:3.6.14-10.el8_4.1 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support | unaffected 0:4.13-3.el8_4.1 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | unaffected 0:3.6.14-10.el8_4.1 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On | unaffected 0:4.13-3.el8_4.1 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | unaffected 0:3.6.16-5.el8_6.5 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support | unaffected 0:4.13-3.el8_6.2 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | unaffected 0:3.6.16-5.el8_6.5 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On | unaffected 0:4.13-3.el8_6.2 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | unaffected 0:3.6.16-7.el8_8.4 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.8 Telecommunications Update Service | unaffected 0:4.13-4.el8_8.1 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.8 Update Services For SAP Solutions | unaffected 0:3.6.16-7.el8_8.4 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 8.8 Update Services For SAP Solutions | unaffected 0:4.13-4.el8_8.1 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 9 | unaffected 0:3.8.10-4.el9_8 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 9 | unaffected 0:3.8.10-4.el9_8 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 9.2 Update Services For SAP Solutions | unaffected 0:3.7.6-21.el9_2.7 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 9.4 Update Services For SAP Solutions | unaffected 0:3.8.3-4.el9_4.6 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 9.6 Extended Update Support | unaffected 0:3.8.3-6.el9_6.4 * rpm | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4.12 | unaffected 412.86.202608241157-0 * rpm | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4.13 | unaffected 413.92.202609302032-0 * rpm | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4.14 | unaffected 414.92.202609111941-0 * rpm | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4.15 | unaffected 415.92.202610081130-0 * rpm | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4.16 | unaffected 416.94.202608150307-0 * rpm | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4.17 | unaffected 417.94.202608250221-0 * rpm | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4.18 | unaffected 418.94.202608142238-0 * rpm | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4.19 | unaffected 4.19.9.6.202607151909-0 * rpm | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4.19 | unaffected 4.19.9.6.202610241701-0 * rpm | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4.20 | unaffected 4.20.9.6.202610242033-0 * rpm | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4.21 | unaffected 4.21.9.6.202610241345-0 * rpm | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4.22 | unaffected 4.22.9.8.202610241758-0 * rpm | Not specified |
| CNA | Red Hat | Cert Manager Support For Red Hat OpenShift Release 1.17 | unaffected 1791371080 * rpm | Not specified |
| CNA | Red Hat | Cert Manager Support For Red Hat OpenShift Release 1.17 | unaffected 1791371069 * rpm | Not specified |
| CNA | Red Hat | Cert Manager Support For Red Hat OpenShift Release 1.17 | unaffected 1791788287 * rpm | Not specified |
| CNA | Red Hat | Cert Manager Support For Red Hat OpenShift Release 1.17 | unaffected 1791970484 * rpm | Not specified |
| CNA | Red Hat | Cert Manager Support For Red Hat OpenShift Release 1.18 | unaffected 1791459707 * rpm | Not specified |
| CNA | Red Hat | Cert Manager Support For Red Hat OpenShift Release 1.18 | unaffected 1791459711 * rpm | Not specified |
| CNA | Red Hat | Cert Manager Support For Red Hat OpenShift Release 1.18 | unaffected 1791459759 * rpm | Not specified |
| CNA | Red Hat | Cert Manager Support For Red Hat OpenShift Release 1.18 | unaffected 1789029076 * rpm | Not specified |
| CNA | Red Hat | Cert Manager Support For Red Hat OpenShift Release 1.18 | unaffected 1791966259 * rpm | Not specified |
| CNA | Red Hat | Cert Manager Support For Red Hat OpenShift Release 1.20 | unaffected 1790598593 * rpm | Not specified |
| CNA | Red Hat | Red Hat Discovery 2 | unaffected 1782159791 * rpm | Not specified |
| CNA | Red Hat | Red Hat Discovery 2 | unaffected 1782166952 * rpm | Not specified |
| CNA | Red Hat | Red Hat Hardened Images | unaffected 3.8.13-1.hum1 * rpm | Not specified |
| CNA | Red Hat | Red Hat OpenShift AI 3.4 | unaffected 1790703542 * rpm | Not specified |
| CNA | Red Hat | Red Hat Update Infrastructure 5 | unaffected 1781525684 * rpm | Not specified |
| CNA | Red Hat | Red Hat Update Infrastructure 5 | unaffected 1781525671 * rpm | Not specified |
| CNA | Red Hat | Red Hat Update Infrastructure 5 | unaffected 1781525693 * rpm | Not specified |
| CNA | Red Hat | Red Hat Update Infrastructure 5 | unaffected 1781525739 * rpm | Not specified |
| CNA | Red Hat | Red Hat Update Infrastructure 5 | unaffected 1787241211 * rpm | Not specified |
| CNA | Red Hat | Red Hat Update Infrastructure 5 | unaffected 1787135742 * rpm | Not specified |
| CNA | Red Hat | Red Hat Update Infrastructure 5 | unaffected 1787241260 * rpm | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 6 | Not specified | Not specified |
| CNA | Red Hat | Red Hat Enterprise Linux 7 | Not specified | Not specified |
| CNA | Red Hat | Red Hat OpenShift Container Platform 4 | Not specified | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| access.redhat.com/errata/RHSA-2026:57483 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:29197 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:89651 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:41921 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:82857 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:89197 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:77320 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:82354 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:13274 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:56853 | [email protected] | access.redhat.com | |
| access.redhat.com/security/cve/CVE-2026-5260 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:30004 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:33125 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:89232 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:26319 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:82811 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:82304 | [email protected] | access.redhat.com | |
| bugzilla.redhat.com/show_bug.cgi | [email protected] | bugzilla.redhat.com | |
| access.redhat.com/errata/RHSA-2026:32962 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:58981 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:26409 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:74674 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:30850 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:82372 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:67837 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:82347 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:20612 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:40762 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:59831 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:20613 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:82888 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:89333 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:60019 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:30849 | [email protected] | access.redhat.com | |
| www.gnutls.org/security-new.html | [email protected] | www.gnutls.org | |
| access.redhat.com/errata/RHSA-2026:82322 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:20611 | [email protected] | access.redhat.com | |
| access.redhat.com/errata/RHSA-2026:72502 | [email protected] | access.redhat.com | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Red Hat would like to thank Joshua Rogers (AISLE Research Team) for reporting this issue. (en)
Additional Advisory Data
| Source | Time | Event |
|---|---|---|
| CNA | 2026-05-06T19:50:31.302Z | Reported to Red Hat. |
| CNA | 2026-04-29T00:00:00.000Z | Made public. |
Workarounds
CNA: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
There are currently no legacy QID mappings associated with this CVE.