mbed TLS up to 3.6.5/4.0.0 null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.4$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in mbed TLS up to 3.6.5/4.0.0. The affected element is an unknown function. This manipulation causes null pointer dereference. This vulnerability is registered as CVE-2026-34874. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability classified as problematic was found in mbed TLS up to 3.6.5/4.0.0. Affected by this vulnerability is some unknown processing. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. The summary by CVE is:

An issue was discovered in Mbed TLS through 3.6.5 and 4.x through 4.0.0. There is a NULL pointer dereference in distinguished name parsing that allows an attacker to write to address 0.

The advisory is shared at mbed-tls.readthedocs.io. This vulnerability is known as CVE-2026-34874 since 03/31/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 315270 (SUSE SLES15 Security Update : ovmf (SUSE-SU-2026:1952-1)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at Tenable (315270) and EUVD (EUVD-2026-18003). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.4

VulDB Base Score: 5.3
VulDB Temp Score: 5.3
VulDB Vector: 🔒
VulDB Reliability: 🔍

ADP CISA Base Score: 7.5
ADP CISA Vector: 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 315270
Nessus Name: SUSE SLES15 Security Update : ovmf (SUSE-SU-2026:1952-1)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

03/31/2026 CVE reserved
04/01/2026 +1 days Advisory disclosed
04/01/2026 +0 days VulDB entry created
06/06/2026 +66 days VulDB entry last update

Sourcesinfo

Advisory: mbed-tls.readthedocs.io
Status: Not defined

CVE: CVE-2026-34874 (🔒)
GCVE (CVE): GCVE-0-2026-34874
GCVE (VulDB): GCVE-100-354745
EUVD: 🔒

Entryinfo

Created: 04/01/2026 20:47
Updated: 06/06/2026 20:04
Changes: 04/01/2026 20:47 (51), 04/02/2026 01:37 (1), 05/19/2026 19:57 (2), 06/06/2026 20:04 (11)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion

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