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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.

PUBLISHED Reserved 2026-04-02 | Published 2026-06-01 | Updated 2026-06-04 | Assigner redhat




LOW: 3.7CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N

Problem types

Observable Timing Discrepancy

Product status

Default status
affected

0:3.8.10-4.el10_2 (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
unaffected

Default status
affected

Default status
affected

Default status
affected

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) vendor-advisory

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

access.redhat.com/security/cve/CVE-2026-5419 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2467686 (RHBZ#2467686) issue-tracking

cve.org (CVE-2026-5419)

nvd.nist.gov (CVE-2026-5419)

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