# CVE-2024-28835: Gnutls: potential crash during chain building/verification

Status: published. Published: 2024-03-21. Updated: 2026-11-08.

A flaw has been discovered in GnuTLS where an application crash can be induced when attempting to verify a specially crafted .pem bundle using the "certtool --verify-chain" command.

## Remediation

- workaround: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. (source: CNA: redhat)

## Affected products and versions

-  /  (gnutls): 3.8.3 (affected). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (gnutls): ≥ 0:3.7.6-23.el9_3.4; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9 (gnutls): ≥ 0:3.8.3-4.el9_4; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 9.2 Extended Update Support (gnutls): ≥ 0:3.7.6-21.el9_2.3; < * (unaffected, rpm). Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 10 (gnutls): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 6 (gnutls): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 7 (gnutls): Version range not reported. Source: CNA: redhat
- Red Hat / Red Hat Enterprise Linux 8 (gnutls): Version range not reported. Source: CNA: redhat
- Siemens / SIMATIC S7-1500 CPU 1518-4 PN/DP MFP: ≥ V3.1.0; < V3.1.5 (affected, custom). Source: ADP: siemens-SADP
- Siemens / SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP: ≥ V3.1.0; < V3.1.5 (affected, custom). Source: ADP: siemens-SADP
- Siemens / SIPLUS S7-1500 CPU 1518-4 PN/DP MFP: ≥ V3.1.0; < V3.1.5 (affected, custom). Source: ADP: siemens-SADP

## Severity and prioritization

- CVSS 3.1: 5 (medium); CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H; source: CNA: redhat

- CVSS 3.1: 5 (medium); CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H; source: NVD: secalert@redhat.com

- CISA KEV: No listing in collected sources

- EPSS: 0.39% as of 2026-11-07; percentile 33.26%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-248

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://access.redhat.com/errata/RHSA-2024:1879 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2024:2570 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/errata/RHSA-2024:2889 (CNA: redhat; vendor-advisory, x_refsource_REDHAT)

- https://access.redhat.com/security/cve/CVE-2024-28835 (CNA: redhat; vdb-entry, x_refsource_REDHAT)

- https://bugzilla.redhat.com/show_bug.cgi?id=2269084 (CNA: redhat; issue-tracking, x_refsource_REDHAT)

- https://lists.gnupg.org/pipermail/gnutls-help/2024-March/004845.html (CNA: redhat)

- http://www.openwall.com/lists/oss-security/2024/03/22/1 (ADP: CVE; x_transferred)

- http://www.openwall.com/lists/oss-security/2024/03/22/2 (ADP: CVE; x_transferred)

- https://access.redhat.com/errata/RHSA-2024:1879 (ADP: CVE; vendor-advisory, x_refsource_REDHAT, x_transferred)

- https://access.redhat.com/errata/RHSA-2024:2570 (ADP: CVE; vendor-advisory, x_refsource_REDHAT, x_transferred)

- https://access.redhat.com/errata/RHSA-2024:2889 (ADP: CVE; vendor-advisory, x_refsource_REDHAT, x_transferred)

- https://access.redhat.com/security/cve/CVE-2024-28835 (ADP: CVE; vdb-entry, x_refsource_REDHAT, x_transferred)

- https://bugzilla.redhat.com/show_bug.cgi?id=2269084 (ADP: CVE; issue-tracking, x_refsource_REDHAT, x_transferred)

- https://lists.gnupg.org/pipermail/gnutls-help/2024-March/004845.html (ADP: CVE; x_transferred)

- https://security.netapp.com/advisory/ntap-20241122-0009/ (ADP: CVE)

- https://lists.debian.org/debian-lts-announce/2024/09/msg00019.html (ADP: CVE)

- https://cert-portal.siemens.com/productcert/html/ssa-398330.html (ADP: siemens-SADP)

- https://access.redhat.com/errata/RHSA-2024:1879 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2024:2570 (secalert@redhat.com)

- https://access.redhat.com/errata/RHSA-2024:2889 (secalert@redhat.com)

- https://access.redhat.com/security/cve/CVE-2024-28835 (secalert@redhat.com)

- https://bugzilla.redhat.com/show_bug.cgi?id=2269084 (secalert@redhat.com)

- https://lists.gnupg.org/pipermail/gnutls-help/2024-March/004845.html (secalert@redhat.com)

- http://www.openwall.com/lists/oss-security/2024/03/22/1 (af854a3a-2127-422b-91ae-364da2661108)

- http://www.openwall.com/lists/oss-security/2024/03/22/2 (af854a3a-2127-422b-91ae-364da2661108)

- https://access.redhat.com/errata/RHSA-2024:1879 (af854a3a-2127-422b-91ae-364da2661108)

- https://access.redhat.com/errata/RHSA-2024:2570 (af854a3a-2127-422b-91ae-364da2661108)

- https://access.redhat.com/errata/RHSA-2024:2889 (af854a3a-2127-422b-91ae-364da2661108)

- https://access.redhat.com/security/cve/CVE-2024-28835 (af854a3a-2127-422b-91ae-364da2661108)

- https://bugzilla.redhat.com/show_bug.cgi?id=2269084 (af854a3a-2127-422b-91ae-364da2661108)

- https://lists.debian.org/debian-lts-announce/2024/09/msg00019.html (af854a3a-2127-422b-91ae-364da2661108)

- https://lists.gnupg.org/pipermail/gnutls-help/2024-March/004845.html (af854a3a-2127-422b-91ae-364da2661108)

- https://security.netapp.com/advisory/ntap-20241122-0009/ (af854a3a-2127-422b-91ae-364da2661108)

- https://cert-portal.siemens.com/productcert/html/ssa-398330.html (0b142b55-0307-4c5a-b3c9-f314f3fb7c5e)

## Provenance

- CNA: redhat: https://www.cve.org/CVERecord?id=CVE-2024-28835; retrieved 2026-11-08; source updated 2026-11-08

- NVD: https://nvd.nist.gov/vuln/detail/CVE-2024-28835; retrieved 2026-11-08; source updated 2026-11-08

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2024-28835; retrieved 2026-11-08; source updated Not reported

Revision: 46b0f1c5e8ce0b070368901c17b4ca2cb02b065815b74c9ca23d883298368555

Canonical: https://y2.dev/cve/CVE-2024-28835

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