Description
A flaw was found in gnutls. The PKCS#7 padding check, performed during decryption, was not constant-time. This timing side-channel could allow a remote attacker to potentially leak sensitive information about the padding bytes through observable timing differences. This vulnerability is a form of information disclosure.
Problem types
Product status
0:3.8.10-4.el10_2 (rpm) before *
0:3.8.10-4.el9_8 (rpm) before *
0:3.8.10-4.el9_8 (rpm) before *
Timeline
| 2026-05-07: | Reported to Red Hat. |
| 2026-04-29: | Made public. |
Credits
Red Hat would like to thank Doria Tang (Stony Brook University) for reporting this issue.
References
access.redhat.com/errata/RHSA-2026:20612 (RHSA-2026:20612)
access.redhat.com/errata/RHSA-2026:20613 (RHSA-2026:20613)
access.redhat.com/security/cve/CVE-2026-5419
bugzilla.redhat.com/show_bug.cgi?id=2467686 (RHBZ#2467686)