CVE-2026-5260 PUBLISHED

Gnutls: gnutls: information disclosure via heap overread in rsa key exchange

Assigner: redhat
Reserved: 31.03.2026 Published: 26.05.2026 Updated: 27.05.2026

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.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H
CVSS Score: 8.2

Product Status

Vendor Red Hat
Product Red Hat Enterprise Linux 8
Versions Default: affected
  • unaffected from 0:3.6.16-8.el8_10.6 to * (excl.)
Vendor Red Hat
Product Red Hat Enterprise Linux 8
Versions Default: affected
  • unaffected from 0:3.6.16-8.el8_10.6 to * (excl.)
Vendor Red Hat
Product Red Hat Enterprise Linux 10
Versions Default: affected
Vendor Red Hat
Product Red Hat Enterprise Linux 6
Versions Default: unknown
Vendor Red Hat
Product Red Hat Enterprise Linux 7
Versions Default: affected
Vendor Red Hat
Product Red Hat Enterprise Linux 9
Versions Default: affected
Vendor Red Hat
Product Red Hat Hardened Images
Versions Default: affected
Vendor Red Hat
Product Red Hat OpenShift Container Platform 4
Versions Default: affected

Credits

  • Red Hat would like to thank Joshua Rogers (AISLE Research Team) for reporting this issue.

References

Problem Types

  • Improper Validation of Specified Quantity in Input CWE