CVE-2026-5260
Discovered by AISLEPUBLISHEDCWE-126
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.
CVSS Base Scores
CVSS v3.1(Primary)
8.2CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
Affected Products
| Vendor | Product | Version | Status |
|---|---|---|---|
| Red Hat | GnuTLS | 0:3.8.10-4.el10_2 | unaffected |
| Red Hat | GnuTLS | 0:3.8.9-9.el10_0.19 | — |
| Red Hat | GnuTLS | 0:3.6.16-8.el8_10.6 | — |
| Red Hat | GnuTLS | 0:3.6.14-10.el8_4.1 | — |
| Red Hat | GnuTLS | 0:4.13-3.el8_4.1 | — |
| Red Hat | GnuTLS | 0:3.6.16-5.el8_6.5 | — |
| Red Hat | GnuTLS | 0:4.13-3.el8_6.2 | — |
| Red Hat | GnuTLS | 0:3.6.16-7.el8_8.4 | — |
| Red Hat | GnuTLS | 0:4.13-4.el8_8.1 | — |
| Red Hat | GnuTLS | 0:3.8.10-4.el9_8 | — |
| Red Hat | GnuTLS | 0:3.8.3-4.el9_4.6 | — |
| Red Hat | GnuTLS | 0:3.8.3-6.el9_6.4 | — |
| Red Hat | GnuTLS | 1782159791 | — |
| Red Hat | GnuTLS | 1782166952 | — |
| Red Hat | GnuTLS | 1781525684 | — |
| Red Hat | GnuTLS | 1781525671 | — |
| Red Hat | GnuTLS | 1781525693 | — |
| Red Hat | GnuTLS | 1781525739 | — |
Credits
- Red Hat would like to thank Joshua Rogers (AISLE Research Team) for reporting this issue.
References
- https://access.redhat.com/errata/RHSA-2026:20611
- https://access.redhat.com/errata/RHSA-2026:20612
- https://access.redhat.com/errata/RHSA-2026:20613
- https://access.redhat.com/errata/RHSA-2026:26319
- https://access.redhat.com/errata/RHSA-2026:26409
- https://access.redhat.com/errata/RHSA-2026:29197
- https://access.redhat.com/errata/RHSA-2026:30004
- https://access.redhat.com/errata/RHSA-2026:30849
- https://access.redhat.com/errata/RHSA-2026:30850
- https://access.redhat.com/errata/RHSA-2026:32962
- https://access.redhat.com/errata/RHSA-2026:33125
- https://access.redhat.com/security/cve/CVE-2026-5260
- https://bugzilla.redhat.com/show_bug.cgi?id=2467450
- https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-10