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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.

PUBLISHED Reserved 2026-03-31 | Published 2026-05-26 | Updated 2026-06-02 | Assigner redhat




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

Problem types

Improper Validation of Specified Quantity in Input

Product status

Default status
affected

0:3.8.10-4.el10_2 (rpm) before *
unaffected

Default status
affected

0:3.6.16-8.el8_10.6 (rpm) before *
unaffected

Default status
affected

0:3.6.16-8.el8_10.6 (rpm) before *
unaffected

Default status
affected

0:3.8.10-4.el9_8 (rpm) before *
unaffected

Default status
affected

0:3.8.10-4.el9_8 (rpm) before *
unaffected

Default status
unknown

Default status
affected

Default status
affected

Default status
affected

Timeline

2026-05-06:Reported to Red Hat.
2026-04-29:Made public.

Credits

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

References

access.redhat.com/errata/RHSA-2026:20611 (RHSA-2026:20611) vendor-advisory

access.redhat.com/errata/RHSA-2026:20612 (RHSA-2026:20612) vendor-advisory

access.redhat.com/errata/RHSA-2026:20613 (RHSA-2026:20613) vendor-advisory

access.redhat.com/security/cve/CVE-2026-5260 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2467450 (RHBZ#2467450) issue-tracking

cve.org (CVE-2026-5260)

nvd.nist.gov (CVE-2026-5260)

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