critical
CVE-2026-33845
gnutls: GnuTLS: Denial of Service via DTLS zero-length fragment
In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.
Severity by source
NVD9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Red Hat7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Trivy's own label is CRITICAL. Rated critical by NVD, Photon OS. Rated lower by Red Hat (high), AlmaLinux (high), Amazon (high), Azure Linux (high), Oracle (high), Rocky Linux (high), Ubuntu (medium).
Description
A flaw in GnuTLS DTLS handshake parsing allows malformed fragments with zero length and non-zero offset, leading to an integer underflow during reassembly and resulting in an out-of-bounds read. This issue is remotely exploitable and may cause information disclosure or denial of service.
Affected packages and fixed versions
| Source | Package | Fixed in |
|---|---|---|
| Photon OS 4.0 | gnutls, gnutls-devel | 3.7.10-7.ph4 |
| Photon OS 5.0 | gnutls, gnutls-devel | 3.8.13-1.ph5 |
| alma 10 | gnutls, gnutls-c++, gnutls-dane and 3 more | 3.8.10-4.el10_2 |
| alma 8 | gnutls, gnutls-c++, gnutls-dane and 2 more | 3.6.16-8.el8_10.6 |
| alma 9 | gnutls, gnutls-c++, gnutls-dane and 2 more | 3.8.10-4.el9_8 |
| alpine 3.20 | gnutls | 3.8.13-r0 |
| alpine 3.21 | gnutls | 3.8.13-r0 |
| alpine 3.22 | gnutls | 3.8.13-r0 |
| alpine 3.23 | gnutls | 3.8.13-r0 |
| alpine 3.24 | gnutls | 3.8.13-r0 |
| alpine edge | gnutls | 3.8.13-r0 |
| amazon linux 2 | gnutls, gnutls-c++, gnutls-dane and 3 more | 3.3.29-9.amzn2.0.4 |
Show all 138 entries from 54 sources
| Source | Package | Fixed in |
|---|---|---|
| Photon OS 4.0 | gnutls | 3.7.10-7.ph4 |
| Photon OS 4.0 | gnutls-devel | 3.7.10-7.ph4 |
| Photon OS 5.0 | gnutls | 3.8.13-1.ph5 |
| Photon OS 5.0 | gnutls-devel | 3.8.13-1.ph5 |
| alma 10 | gnutls | 3.8.10-4.el10_2 |
| alma 10 | gnutls-c++ | 3.8.10-4.el10_2 |
| alma 10 | gnutls-dane | 3.8.10-4.el10_2 |
| alma 10 | gnutls-devel | 3.8.10-4.el10_2 |
| alma 10 | gnutls-fips | 3.8.10-4.el10_2 |
| alma 10 | gnutls-utils | 3.8.10-4.el10_2 |
| alma 8 | gnutls | 3.6.16-8.el8_10.6 |
| alma 8 | gnutls-c++ | 3.6.16-8.el8_10.6 |
| alma 8 | gnutls-dane | 3.6.16-8.el8_10.6 |
| alma 8 | gnutls-devel | 3.6.16-8.el8_10.6 |
| alma 8 | gnutls-utils | 3.6.16-8.el8_10.6 |
| alma 9 | gnutls | 3.8.10-4.el9_8 |
| alma 9 | gnutls-c++ | 3.8.10-4.el9_8 |
| alma 9 | gnutls-dane | 3.8.10-4.el9_8 |
| alma 9 | gnutls-devel | 3.8.10-4.el9_8 |
| alma 9 | gnutls-utils | 3.8.10-4.el9_8 |
| alpine 3.20 | gnutls | 3.8.13-r0 |
| alpine 3.21 | gnutls | 3.8.13-r0 |
| alpine 3.22 | gnutls | 3.8.13-r0 |
| alpine 3.23 | gnutls | 3.8.13-r0 |
| alpine 3.24 | gnutls | 3.8.13-r0 |
| alpine edge | gnutls | 3.8.13-r0 |
| amazon linux 2 | gnutls | 3.3.29-9.amzn2.0.4 |
| amazon linux 2 | gnutls-c++ | 3.3.29-9.amzn2.0.4 |
| amazon linux 2 | gnutls-dane | 3.3.29-9.amzn2.0.4 |
| amazon linux 2 | gnutls-debuginfo | 3.3.29-9.amzn2.0.4 |
| amazon linux 2 | gnutls-devel | 3.3.29-9.amzn2.0.4 |
| amazon linux 2 | gnutls-utils | 3.3.29-9.amzn2.0.4 |
| amazon linux 2023 | gnutls | 3.8.3-8.amzn2023.0.4 |
| amazon linux 2023 | gnutls-c++ | 3.8.3-8.amzn2023.0.4 |
| amazon linux 2023 | gnutls-c++-debuginfo | 3.8.3-8.amzn2023.0.4 |
| amazon linux 2023 | gnutls-dane | 3.8.3-8.amzn2023.0.4 |
| amazon linux 2023 | gnutls-dane-debuginfo | 3.8.3-8.amzn2023.0.4 |
| amazon linux 2023 | gnutls-debuginfo | 3.8.3-8.amzn2023.0.4 |
| amazon linux 2023 | gnutls-debugsource | 3.8.3-8.amzn2023.0.4 |
| amazon linux 2023 | gnutls-devel | 3.8.3-8.amzn2023.0.4 |
| amazon linux 2023 | gnutls-utils | 3.8.3-8.amzn2023.0.4 |
| amazon linux 2023 | gnutls-utils-debuginfo | 3.8.3-8.amzn2023.0.4 |
| Azure Linux 3.0 | gnutls | 0:3.8.3-9.azl3 |
| debian 11 | gnutls28 | 3.7.1-5+deb11u10 |
| debian 12 | gnutls28 | 3.7.9-2+deb12u7 |
| debian 13 | gnutls28 | 3.8.9-3+deb13u4 |
| debian 14 | gnutls28 | 3.8.13-1 |
| echo | gnutls28 | 3.7.9-2+deb12u7 |
| Oracle Linux 7 | gnutls | 3.3.29-9.0.1.el7_9 |
| Oracle Linux 7 | gnutls-c++ | 3.3.29-9.0.1.el7_9 |
| Oracle Linux 7 | gnutls-dane | 3.3.29-9.0.1.el7_9 |
| Oracle Linux 7 | gnutls-devel | 3.3.29-9.0.1.el7_9 |
| Oracle Linux 7 | gnutls-utils | 3.3.29-9.0.1.el7_9 |
| Oracle Linux 8 | gnutls | 3.6.16-8.el8_10.6 |
| Oracle Linux 8 | gnutls-c++ | 3.6.16-8.el8_10.6 |
| Oracle Linux 8 | gnutls-dane | 3.6.16-8.el8_10.6 |
| Oracle Linux 8 | gnutls-devel | 3.6.16-8.el8_10.6 |
| Oracle Linux 8 | gnutls-utils | 3.6.16-8.el8_10.6 |
| Oracle Linux 9 | gnutls | 3.8.10-4.el9_8 |
| Oracle Linux 9 | gnutls-c++ | 3.8.10-4.el9_8 |
| Oracle Linux 9 | gnutls-dane | 3.8.10-4.el9_8 |
| Oracle Linux 9 | gnutls-devel | 3.8.10-4.el9_8 |
| Oracle Linux 9 | gnutls-utils | 3.8.10-4.el9_8 |
| rapidfort alma 10 | gnutls | 0:3.8.10-4.el10_2 |
| rapidfort alma 10 | gnutls-c++ | 3.8.10-4.el10_2 |
| rapidfort alma 10 | gnutls-dane | 0:3.8.10-4.el10_2 |
| rapidfort alma 10 | gnutls-devel | 3.8.10-4.el10_2 |
| rapidfort alma 10 | gnutls-fips | 3.8.10-4.el10_2 |
| rapidfort alma 10 | gnutls-utils | 0:3.8.10-4.el10_2 |
| rapidfort alma 9 | gnutls | 0:3.8.10-4.el9_8 |
| rapidfort alma 9 | gnutls-c++ | 3.8.10-4.el9_8 |
| rapidfort alma 9 | gnutls-dane | 0:3.8.10-4.el9_8 |
| rapidfort alma 9 | gnutls-devel | 3.8.10-4.el9_8 |
| rapidfort alma 9 | gnutls-utils | 0:3.8.10-4.el9_8 |
| rapidfort alpine 3.20 | gnutls | 3.8.13-r0 |
| rapidfort alpine 3.21 | gnutls | 3.8.13-r0 |
| rapidfort alpine 3.22 | gnutls | 3.8.13-r0 |
| rapidfort alpine 3.23 | gnutls | 3.8.13-r0 |
| rapidfort alpine 3.24 | gnutls | 3.8.13-r0 |
| rapidfort amazon linux 2023 | gnutls | 0:3.8.3-8.amzn2023.0.4 |
| rapidfort amazon linux 2023 | gnutls-c++ | 3.8.3-8.amzn2023.0.4 |
| rapidfort amazon linux 2023 | gnutls-dane | 0:3.8.3-8.amzn2023.0.4 |
| rapidfort amazon linux 2023 | gnutls-devel | 3.8.3-8.amzn2023.0.4 |
| rapidfort amazon linux 2023 | gnutls-utils | 3.8.3-8.amzn2023.0.4 |
| rapidfort debian 12 | gnutls28 | 0:3.7.9-2+deb12u7, 0:3.8.13-1, 0:3.8.9-3+deb13u4 |
| rapidfort debian 12 | rf-gnutls28 | 0:3.8.13-1, 0:3.8.9-3+deb13u4 |
| rapidfort debian 13 | gnutls28 | 0:3.7.9-2+deb12u7, 0:3.8.13-1, 0:3.8.9-3+deb13u4 |
| rapidfort debian 13 | rf-gnutls28 | 0:3.8.13-1, 0:3.8.9-3+deb13u4 |
| rapidfort Oracle Linux 10 | gnutls | 0:3.8.10-4.el10_2 |
| rapidfort Oracle Linux 10 | gnutls-c++ | 0:3.8.10-4.el10_2 |
| rapidfort Oracle Linux 10 | gnutls-dane | 0:3.8.10-4.el10_2 |
| rapidfort Oracle Linux 10 | gnutls-devel | 0:3.8.10-4.el10_2 |
| rapidfort Oracle Linux 10 | gnutls-fips | 0:3.8.10-4.el10_2 |
| rapidfort Oracle Linux 10 | gnutls-utils | 0:3.8.10-4.el10_2 |
| rapidfort Oracle Linux 9 | gnutls | 0:3.8.10-4.el9_8 |
| rapidfort Oracle Linux 9 | gnutls-c++ | 0:3.8.10-4.el9_8 |
| rapidfort Oracle Linux 9 | gnutls-dane | 0:3.8.10-4.el9_8 |
| rapidfort Oracle Linux 9 | gnutls-devel | 0:3.8.10-4.el9_8 |
| rapidfort Oracle Linux 9 | gnutls-utils | 0:3.8.10-4.el9_8 |
| rapidfort rocky 9 | gnutls | 0:3.8.10-4.el9_8 |
| rapidfort rocky 9 | gnutls-c++ | 0:3.8.10-4.el9_8 |
| rapidfort rocky 9 | gnutls-dane | 0:3.8.10-4.el9_8 |
| rapidfort rocky 9 | gnutls-devel | 0:3.8.10-4.el9_8 |
| rapidfort rocky 9 | gnutls-utils | 0:3.8.10-4.el9_8 |
| rapidfort rocky 9 | rf-gnutls | 0:3.8.10-4.el9_8 |
| rapidfort rocky 9 | rf-gnutls-dane | 0:3.8.10-4.el9_8 |
| rapidfort ubuntu 20.04 | gnutls28 | 0:3.7.3-4ubuntu1.9, 0:3.8.3-1.1ubuntu3.6, 0:3.8.9-3ubuntu2.2 |
| rapidfort ubuntu 20.04 | rf-gnutls28 | 0:3.7.3-4ubuntu1.9, 0:3.8.3-1.1ubuntu3.6, 0:3.8.9-3ubuntu2.2 |
| rapidfort ubuntu 22.04 | gnutls28 | 0:3.7.3-4ubuntu1.9, 0:3.8.3-1.1ubuntu3.6, 0:3.8.9-3ubuntu2.2 |
| rapidfort ubuntu 22.04 | rf-gnutls28 | 0:3.7.3-4ubuntu1.9, 0:3.8.3-1.1ubuntu3.6, 0:3.8.9-3ubuntu2.2 |
| rapidfort ubuntu 24.04 | gnutls28 | 0:3.7.3-4ubuntu1.9, 0:3.8.3-1.1ubuntu3.6, 0:3.8.9-3ubuntu2.2 |
| rapidfort ubuntu 24.04 | rf-gnutls28 | 0:3.7.3-4ubuntu1.9, 0:3.8.3-1.1ubuntu3.6, 0:3.8.9-3ubuntu2.2 |
| Red Hat | openshift/ose-rhel-coreos-8 | no fix listed |
| Red Hat | openshift/ose-rhel-coreos-9 | no fix listed |
| Red Hat | openshift4/ose-hypershift-rhel9 | no fix listed |
| rocky 10 | gnutls | 3.8.10-4.el10_2 |
| rocky 8 | gnutls | 3.6.16-8.el8_10.6 |
| rocky 9 | gnutls | 3.8.10-4.el9_8 |
| root.io alpine 3.22 | rootio-gnutls | 3.8.13-r0 |
| root.io debian 12 | gnutls28 | 3.7.9-2+deb12u7 |
| root.io debian 12 | rootio-gnutls28 | 3.7.9-2+deb12u7 |
| root.io debian 13 | gnutls28 | 3.8.9-3+deb13u4 |
| root.io debian 13 | rootio-gnutls28 | 3.8.9-3+deb13u4 |
| seal debian | gnutls28 | 3.7.9-2+sp999, 3.7.9-2+deb12u4+sp999, 3.8.3-1.1ubuntu3.2+sp999 |
| seal debian | seal-gnutls28 | 3.7.9-2+sp999, 3.7.9-2+deb12u4+sp999, 3.8.3-1.1ubuntu3.2+sp999 |
| seal Red Hat 6 | libtasn1 | 2.3-6.el6_5+sp999 |
| seal Red Hat 6 | seal-libtasn1 | 2.3-6.el6_5+sp999 |
| seal Red Hat 7 | libtasn1 | 4.10-1.el7+sp999 |
| seal Red Hat 7 | seal-libtasn1 | 4.10-1.el7+sp999 |
| seal Red Hat 8 | gnutls | 3.6.16-8.el8_9.3+sp2 |
| seal Red Hat 8 | libtasn1 | 4.13-4.el8_7+sp999 |
| seal Red Hat 8 | seal-gnutls | 3.6.16-8.el8_9.3+sp2 |
| seal Red Hat 8 | seal-libtasn1 | 4.13-4.el8_7+sp999 |
| ubuntu 20.04-ESM | gnutls28 | 3.6.13-2ubuntu1.12+esm2 |
| ubuntu 22.04 | gnutls28 | 3.7.3-4ubuntu1.9 |
| ubuntu 24.04 | gnutls28 | 3.8.3-1.1ubuntu3.6 |
| ubuntu 25.10 | gnutls28 | 3.8.9-3ubuntu2.2 |
| ubuntu 26.04 | gnutls28 | 3.8.12-2ubuntu1.1 |
References
- https://access.redhat.com/errata/RHSA-2026:13274
- https://access.redhat.com/errata/RHSA-2026:20611
- https://access.redhat.com/errata/RHSA-2026:20612
- https://access.redhat.com/errata/RHSA-2026:20613
- https://access.redhat.com/errata/RHSA-2026:26319
- https://access.redhat.com/errata/RHSA-2026:26409
- https://access.redhat.com/errata/RHSA-2026:29197
- https://access.redhat.com/errata/RHSA-2026:30004
All 79 references
- https://access.redhat.com/errata/RHSA-2026:30849
- https://access.redhat.com/errata/RHSA-2026:30850
- https://access.redhat.com/errata/RHSA-2026:32962
- https://access.redhat.com/errata/RHSA-2026:33125
- https://access.redhat.com/errata/RHSA-2026:34372
- https://access.redhat.com/errata/RHSA-2026:36004
- https://access.redhat.com/errata/RHSA-2026:36005
- https://access.redhat.com/errata/RHSA-2026:36006
- https://access.redhat.com/errata/RHSA-2026:41921
- https://access.redhat.com/errata/RHSA-2026:56786
- https://access.redhat.com/errata/RHSA-2026:56853
- https://access.redhat.com/errata/RHSA-2026:56911
- https://access.redhat.com/errata/RHSA-2026:57402
- https://access.redhat.com/errata/RHSA-2026:57483
- https://access.redhat.com/errata/RHSA-2026:58981
- https://access.redhat.com/errata/RHSA-2026:59831
- https://access.redhat.com/errata/RHSA-2026:60019
- https://access.redhat.com/errata/RHSA-2026:65839
- https://access.redhat.com/errata/RHSA-2026:72502
- https://access.redhat.com/errata/RHSA-2026:74674
- https://access.redhat.com/errata/RHSA-2026:82304
- https://access.redhat.com/errata/RHSA-2026:82322
- https://access.redhat.com/errata/RHSA-2026:82347
- https://access.redhat.com/errata/RHSA-2026:82354
- https://access.redhat.com/errata/RHSA-2026:82372
- https://access.redhat.com/errata/RHSA-2026:82857
- https://access.redhat.com/errata/RHSA-2026:82888
- https://access.redhat.com/security/cve/CVE-2026-33845
- https://bugzilla.redhat.com/2445763
- https://bugzilla.redhat.com/2450624
- https://bugzilla.redhat.com/2450625
- https://bugzilla.redhat.com/2467279
- https://bugzilla.redhat.com/2467289
- https://bugzilla.redhat.com/2467437
- https://bugzilla.redhat.com/show_bug.cgi?id=2445762
- https://bugzilla.redhat.com/show_bug.cgi?id=2445763
- https://bugzilla.redhat.com/show_bug.cgi?id=2450624
- https://bugzilla.redhat.com/show_bug.cgi?id=2450625
- https://bugzilla.redhat.com/show_bug.cgi?id=2467279
- https://bugzilla.redhat.com/show_bug.cgi?id=2467289
- https://bugzilla.redhat.com/show_bug.cgi?id=2467437
- https://bugzilla.redhat.com/show_bug.cgi?id=2467441
- https://bugzilla.redhat.com/show_bug.cgi?id=2467448
- https://bugzilla.redhat.com/show_bug.cgi?id=2467450
- https://bugzilla.redhat.com/show_bug.cgi?id=2467451
- https://bugzilla.redhat.com/show_bug.cgi?id=2467678
- https://bugzilla.redhat.com/show_bug.cgi?id=2467686
- https://creativecommons.org/licenses/by/4.0/
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-33845
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-33846
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-3832
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-3833
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-42009
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-42010
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-42011
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-42012
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-42013
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-42014
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-42015
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-5260
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2026-5419
- https://errata.almalinux.org/9/ALSA-2026-20612.html
- https://errata.rockylinux.org/RLSA-2026:20612
- https://linux.oracle.com/cve/CVE-2026-33845.html
- https://linux.oracle.com/errata/ELSA-2026-50346.html
- https://nvd.nist.gov/vuln/detail/CVE-2026-33845
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33845.json
- https://ubuntu.com/security/notices/USN-8284-1
- https://ubuntu.com/security/notices/USN-8502-1
- https://www.cve.org/CVERecord?id=CVE-2026-33845
- https://www.gnutls.org/security-new.html#GNUTLS-SA-2026-04-29-3