CVE-2026-5419

Guntls: gnutls: information disclosure via timing side-channel in pkcs#7 padding removal

CVE-2026-5419 is fixed in 16 products on 1 platform, first by RHSA-2026:26409, released May 4, 2026. It is not reported as exploited. Patch Radar priority: High.

High
CVSS
8.2
Low
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0054
45th percentile

The gnutls packages provide the GNU Transport Layer Security (GnuTLS) library, which implements cryptographic algorithms and protocols such as SSL, TLS, and DTLS. Security Fix(es): * gnutls: Fix qsort comparator in DTLS reassembly (CVE-2026-42009) * gnutls: Fix crashing on an underflow with a DTLS datagram (CVE-2026-33845) * gnutls: Fix RSA-PSK identity truncation (CVE-2026-42010) * gnutls: Fix case-sensitivity of domain name comparison in name constraints (CVE-2026-3833) * gnutls: Fix intersecting empty name constraints (CVE-2026-42011) * gnutls: Denial of Service via heap buffer overflow in DTLS handshake fragment reassembly (CVE-2026-33846) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Where it's fixed

ProductFixed inFixReleased
Linux
gnutls · RHEL 10 3.8.9-9.el10_0.19 RHSA-2026:26409 May 4, 2026
gnutls · RHEL 9 0:3.8.10-4.el9_8 RHSA-2026:20612 Jun 24, 2026
gnutls · almalinux 10 3.8.10-4.el10_2 ALSA-2026:20613 May 26, 2026
gnutls · almalinux 9 3.8.10-4.el9_8 ALSA-2026:20612 May 26, 2026
gnutls · amzn 2023 3.8.10-4.amzn2023.0.2 ALAS2023-2026-1808 Jun 8, 2026
gnutls · ol 10 0:3.8.10-4.el10_2 ELSA-2026-20613 Jul 17, 2026
gnutls · ol 9 0:3.8.10-4.el9_8 ELSA-2026-20612 Jun 24, 2026
gnutls · rocky 10 0:3.8.10-4.el10_2 RLSA-2026:20613 Jun 5, 2026
gnutls · rocky 9 0:3.8.10-4.el9_8 RLSA-2026:20612 Jun 2, 2026
gnutls-bin · Ubuntu 24.04.5 LTS (noble) 3.8.3-1.1ubuntu3.6 gnutls-bin 3.8.3-1.1ubuntu3.6 May 27, 2026
gnutls-bin · Ubuntu 25.10 (questing) 3.8.9-3ubuntu2.2 gnutls-bin 3.8.9-3ubuntu2.2 May 27, 2026
gnutls-bin · Ubuntu 26.04.1 LTS (resolute) 3.8.12-2ubuntu1.1 gnutls-bin 3.8.12-2ubuntu1.1 May 7, 2026
gnutls-c++ · RHEL 9 0:3.8.10-4.el9_8 RHSA-2026:20612 Jun 24, 2026
gnutls-c++ · almalinux 10 3.8.10-4.el10_2 ALSA-2026:20613 May 26, 2026
gnutls-c++ · almalinux 9 3.8.10-4.el9_8 ALSA-2026:20612 May 26, 2026
gnutls-c++ · amzn 2023 3.8.10-4.amzn2023.0.2 ALAS2023-2026-1808 Jun 8, 2026
gnutls-c++ · ol 10 0:3.8.10-4.el10_2 ELSA-2026-20613 Jul 17, 2026
gnutls-c++ · ol 9 0:3.8.10-4.el9_8 ELSA-2026-20612 Jun 24, 2026
gnutls-c++-debuginfo · amzn 2023 3.8.10-4.amzn2023.0.2 ALAS2023-2026-1808 Jun 8, 2026
gnutls-dane · RHEL 9 0:3.8.10-4.el9_8 RHSA-2026:20612 Jun 24, 2026
gnutls-dane · almalinux 10 3.8.10-4.el10_2 ALSA-2026:20613 May 26, 2026
gnutls-dane · almalinux 9 3.8.10-4.el9_8 ALSA-2026:20612 May 26, 2026
gnutls-dane · amzn 2023 3.8.10-4.amzn2023.0.2 ALAS2023-2026-1808 Jun 8, 2026
gnutls-dane · ol 10 0:3.8.10-4.el10_2 ELSA-2026-20613 Jul 17, 2026
gnutls-dane · ol 9 0:3.8.10-4.el9_8 ELSA-2026-20612 Jun 24, 2026
gnutls-dane-debuginfo · amzn 2023 3.8.10-4.amzn2023.0.2 ALAS2023-2026-1808 Jun 8, 2026
gnutls-debuginfo · amzn 2023 3.8.10-4.amzn2023.0.2 ALAS2023-2026-1808 Jun 8, 2026
gnutls-debugsource · amzn 2023 3.8.10-4.amzn2023.0.2 ALAS2023-2026-1808 Jun 8, 2026
gnutls-devel · RHEL 9 0:3.8.10-4.el9_8 RHSA-2026:20612 Jun 24, 2026
gnutls-devel · almalinux 10 3.8.10-4.el10_2 ALSA-2026:20613 May 26, 2026
gnutls-devel · almalinux 9 3.8.10-4.el9_8 ALSA-2026:20612 May 26, 2026
gnutls-devel · amzn 2023 3.8.10-4.amzn2023.0.2 ALAS2023-2026-1808 Jun 8, 2026
gnutls-devel · ol 10 0:3.8.10-4.el10_2 ELSA-2026-20613 Jul 17, 2026
gnutls-devel · ol 9 0:3.8.10-4.el9_8 ELSA-2026-20612 Jun 24, 2026
gnutls-fips · almalinux 10 3.8.10-4.el10_2 ALSA-2026:20613 May 26, 2026
gnutls-fips · ol 10 0:3.8.10-4.el10_2 ELSA-2026-20613 Jul 17, 2026
gnutls-utils · RHEL 9 0:3.8.10-4.el9_8 RHSA-2026:20612 Jun 24, 2026
gnutls-utils · almalinux 10 3.8.10-4.el10_2 ALSA-2026:20613 May 26, 2026
gnutls-utils · almalinux 9 3.8.10-4.el9_8 ALSA-2026:20612 May 26, 2026
gnutls-utils · amzn 2023 3.8.10-4.amzn2023.0.2 ALAS2023-2026-1808 Jun 8, 2026
gnutls-utils · ol 10 0:3.8.10-4.el10_2 ELSA-2026-20613 Jul 17, 2026
gnutls-utils · ol 9 0:3.8.10-4.el9_8 ELSA-2026-20612 Jun 24, 2026
gnutls-utils-debuginfo · amzn 2023 3.8.10-4.amzn2023.0.2 ALAS2023-2026-1808 Jun 8, 2026
gnutls28 · Debian 12.15 (bookworm) 3.7.9-2+deb12u7 DEBIAN-CVE-2026-5419 May 15, 2026
gnutls28 · Debian 13.5 (trixie) 3.8.9-3+deb13u4 DEBIAN-CVE-2026-5419 May 15, 2026
gnutls28 · Debian 14 3.8.13-1 DEBIAN-CVE-2026-5419 May 15, 2026
libgnutls-dane0t64 · Ubuntu 24.04.5 LTS (noble) 3.8.3-1.1ubuntu3.6 libgnutls-dane0t64 3.8.3-1.1ubuntu3.6 May 27, 2026
libgnutls-dane0t64 · Ubuntu 25.10 (questing) 3.8.9-3ubuntu2.2 libgnutls-dane0t64 3.8.9-3ubuntu2.2 May 27, 2026
libgnutls-dane0t64 · Ubuntu 26.04.1 LTS (resolute) 3.8.12-2ubuntu1.1 libgnutls-dane0t64 3.8.12-2ubuntu1.1 May 7, 2026
libgnutls-openssl27t64 · Ubuntu 24.04.5 LTS (noble) 3.8.3-1.1ubuntu3.6 libgnutls-openssl27t64 3.8.3-1.1ubuntu3.6 May 27, 2026
libgnutls-openssl27t64 · Ubuntu 25.10 (questing) 3.8.9-3ubuntu2.2 libgnutls-openssl27t64 3.8.9-3ubuntu2.2 May 27, 2026
libgnutls-openssl27t64 · Ubuntu 26.04.1 LTS (resolute) 3.8.12-2ubuntu1.1 libgnutls-openssl27t64 3.8.12-2ubuntu1.1 May 7, 2026
libgnutls30t64 · Ubuntu 24.04.5 LTS (noble) 3.8.3-1.1ubuntu3.6 libgnutls30t64 3.8.3-1.1ubuntu3.6 May 27, 2026
libgnutls30t64 · Ubuntu 25.10 (questing) 3.8.9-3ubuntu2.2 libgnutls30t64 3.8.9-3ubuntu2.2 May 27, 2026
libgnutls30t64 · Ubuntu 26.04.1 LTS (resolute) 3.8.12-2ubuntu1.1 libgnutls30t64 3.8.12-2ubuntu1.1 May 7, 2026

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