High 7.5Published Feb 5, 2024

CVE-2023-50781M2crypto: bleichenbacher timing attacks in the rsa decryption api - incomplete fix for cve-2020-25657

Updated under an hour ago (2026-10-19 08:23 UTC)

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It affects Red Hat Enterprise Linux 6 and 5 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Red Hat Enterprise Linux 6

Exploited in the last 30 days

A flaw was found in m2crypto. This issue may allow a remote attacker to decrypt captured messages in TLS servers that use RSA key exchanges, which may lead to exposure of confidential or sensitive data.

CVSS: 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness (CWE): CWE-203
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: redhat
NVD analysis: Analyzed
Record last updated: Oct 15, 2026
First seen by InfoSec Signals: Oct 15, 2026

Affected products

Affected products

Red Hat Red Hat Enterprise Linux 6 redhat:enterprise_linux	6	CNA record
Red Hat Red Hat Update Infrastructure 4 for Cloud Providers redhat:rhui	4	CNA record
Red Hat Red Hat Virtualization 4 redhat:rhev_hypervisor	4	CNA record
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	before V1.1.1	CISA ADP
redhat enterprise_linux redhat:enterprise_linux	8.0; 9.0	NVD
redhat update_infrastructure redhat:update_infrastructure	4	NVD
m2crypto_project m2crypto m2crypto_project:m2crypto	through 0.40.1	NVD

References

https://access.redhat.com/security/cve/CVE-2023-50781vdb-entry, x-refsource-redhat, third-party-advisory
https://bugzilla.redhat.com/show_bug.cgi?id=2254426issue-tracking, x-refsource-redhat
https://cert-portal.siemens.com/productcert/html/ssa-265688.htmlthird-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.