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Vulnerability record · CVE-2022-46393 · published 15 December 2022

CVE-2022-46393: Arm mbed tls out-of-bounds read vulnerability

Arm · Mbed Tls

An issue was discovered in Mbed TLS before 2.28.2 and 3.x before 3.3.0. There is a potential heap-based buffer overflow and heap-based buffer over-read in DTLS if MBEDTLS_SSL_DTLS_CONNECTION_ID is enabled and MBEDTLS_SSL_CID_IN_LEN_MAX > 2 * MBEDTLS_SSL_CID_OUT_LEN_MAX.

9.8 CVSS 3.1 Critical EPSS 1.2% · top 32.8% CWE-125 · Out-of-bounds readCWE-787 · Out-of-bounds write
9.8CVSS 3.1 base score
1.2%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
10References
17 Jun 2026Last modified by NVD

Description

An issue was discovered in Mbed TLS before 2.28.2 and 3.x before 3.3.0. There is a potential heap-based buffer overflow and heap-based buffer over-read in DTLS if MBEDTLS_SSL_DTLS_CONNECTION_ID is enabled and MBEDTLS_SSL_CID_IN_LEN_MAX > 2 * MBEDTLS_SSL_CID_OUT_LEN_MAX.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/Mbed-TLS/mbedtls/releases/tag/v2.28.2 Release NotesThird Party Advisory
https://github.com/Mbed-TLS/mbedtls/releases/tag/v3.3.0 Release NotesThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4BR7ZCVKLPGCOEEALUHZMFH
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6XMKJ5IMJEPXYAHHU56Z4P2
https://mbed-tls.readthedocs.io/en/latest/tech-updates/security-advisories/ Vendor Advisory
https://github.com/Mbed-TLS/mbedtls/releases/tag/v2.28.2 Release NotesThird Party Advisory
https://github.com/Mbed-TLS/mbedtls/releases/tag/v3.3.0 Release NotesThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4BR7ZCVKLPGCOEEALUHZMFH
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/6XMKJ5IMJEPXYAHHU56Z4P2
https://mbed-tls.readthedocs.io/en/latest/tech-updates/security-advisories/ Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2022-46393), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.