CVE-2023-43615

Mbed TLS 2.x before 2.28.5 and 3.x before 3.5.0 has a Buffer Overflow.

7.5 HighFix available

Mbed TLS 2.x before 2.28.5 and 3.x before 3.5.0 has a Buffer Overflow.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None

What an attacker can affect

Confidentiality: High
Integrity: None
Availability: None

Exploit likelihood

0.94%Up 0.9 points since Oct 7, 2023

What each source reports

NVD Score used 7.5

Mbed TLS 2.x before 2.28.5 and 3.x before 3.5.0 has a Buffer Overflow.

Record: CVE-2023-43615
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-120
Updated: 2026-11-02

CVE List No score

Mbed TLS 2.x before 2.28.5 and 3.x before 3.5.0 has a Buffer Overflow.

Record: CVE-2023-43615
Updated: 2026-11-02

EUVDEUVD-2023-48021 No score

Mbed TLS 2.x before 2.28.5 and 3.x before 3.5.0 has a Buffer Overflow.

Record: EUVD-2023-48021
Updated: 2026-11-03

GitHub AdvisoriesGHSA-656f-g689-89jh 7.5

Mbed TLS 2.x before 2.28.5 and 3.x before 3.5.0 has a Buffer Overflow.

Mbed TLS 2.x before 2.28.5 and 3.x before 3.5.0 has a Buffer Overflow.

Record: GHSA-656f-g689-89jh
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Weakness: CWE-120
Updated: 2026-11-02

OSVALPINE-CVE-2023-43615 7.5

Mbed TLS 2.x before 2.28.5 and 3.x before 3.5.0 has a Buffer Overflow.

Record: ALPINE-CVE-2023-43615
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-03

OSVDEBIAN-CVE-2023-43615 7.5

Mbed TLS 2.x before 2.28.5 and 3.x before 3.5.0 has a Buffer Overflow.

Record: DEBIAN-CVE-2023-43615
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-02

OSVJLSEC-2025-222 7.5

Mbed TLS 2.x before 2.28.5 and 3.x before 3.5.0 has a Buffer Overflow.

Mbed TLS 2.x before 2.28.5 and 3.x before 3.5.0 has a Buffer Overflow.

Record: JLSEC-2025-222
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-02

OSVUBUNTU-CVE-2023-43615 7.5

Mbed TLS 2.x before 2.28.5 and 3.x before 3.5.0 has a Buffer Overflow.

Record: UBUNTU-CVE-2023-43615
CVSS 3.1: 7.5 HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Updated: 2026-11-02

OSV No score

Mbed TLS 2.x before 2.28.5 and 3.x before 3.5.0 has a Buffer Overflow.

Record: CVE-2023-43615
Updated: 2026-11-02

Affected products

Affected packages

Affected packages
Package	Affected	Fixed
`mbedtls` Alpine:v3.16	before 2.28.5-r0	2.28.5-r0
`mbedtls` Alpine:v3.17	before 2.28.5-r0	2.28.5-r0
`mbedtls` Alpine:v3.18	before 2.28.5-r0	2.28.5-r0
`mbedtls` Alpine:v3.19	before 2.28.5-r0	2.28.5-r0
`mbedtls` Alpine:v3.20	before 2.28.5-r0	2.28.5-r0
`mbedtls` Alpine:v3.21	before 2.28.5-r0	2.28.5-r0
`mbedtls` Alpine:v3.22	before 2.28.5-r0	2.28.5-r0
`mbedtls` Alpine:v3.23	before 2.28.5-r0	2.28.5-r0
`mbedtls` Alpine:v3.24	before 2.28.5-r0	2.28.5-r0
`mbedtls2` Alpine:v3.20	before 2.28.5-r0	2.28.5-r0

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Affected packages
Package	Affected	Fixed
`mbedtls2` Alpine:v3.21	before 2.28.5-r0	2.28.5-r0
`mbedtls2` Alpine:v3.22	before 2.28.5-r0	2.28.5-r0
`mbedtls2` Alpine:v3.23	before 2.28.5-r0	2.28.5-r0
`mbedtls2` Alpine:v3.24	before 2.28.5-r0	2.28.5-r0
`mbedtls3` Alpine:v3.24	before 2.28.5-r0	2.28.5-r0
`mbedtls` Debian:12	All versions, plus listed versions 2.28.3-12.28.4-12.28.5-12.28.6-12.28.7-1 Show 18 moreShow less 2.28.7-1.12.28.7-1.1~exp12.28.8-13.6.0-13.6.0-23.6.0-33.6.2-13.6.2-23.6.2-33.6.3-13.6.4-13.6.4-23.6.5-0.13.6.5-0.1~deb13u13.6.6-0.13.6.6-0.1~deb13u13.6.7-23.6.7-3	None known
`mbedtls` Debian:13	before 2.28.5-1	2.28.5-1
`mbedtls` Debian:14	before 2.28.5-1	2.28.5-1
`MbedTLS_jll` Julia	before 2.28.6+0	2.28.6+0
`mbedtls` Ubuntu:16.04:LTS	All versions, plus listed versions 2.1.2-12.2.0-12.2.1-12.2.1-22.2.1-2ubuntu0.12.2.1-2ubuntu0.22.2.1-2ubuntu0.3	None known
`mbedtls` Ubuntu:Pro:18.04:LTS	All versions, plus listed versions 2.5.1-1ubuntu12.6.0-12.7.0-22.8.0-12.8.0-1ubuntu0.1~esm1	None known
`mbedtls` Ubuntu:Pro:20.04:LTS	All versions, plus listed versions 2.16.2-12.16.3-12.16.4-1ubuntu22.16.4-1ubuntu2+esm1	None known
`mbedtls` Ubuntu:Pro:22.04:LTS	All versions, plus listed versions 2.16.9-0.1ubuntu12.16.11-0.1ubuntu12.16.11-0.32.28.0-12.28.0-1build12.28.0-1ubuntu0.1~esm1	None known

History

History
Recorded	Changed	Sources
Nov 3, 2026	affected	OSV
Nov 3, 2026	aliases	EUVD
Nov 2, 2026	first indexed	CVE List, GitHub Advisories, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2023-43615 is a high vulnerability (CVSS 7.5) in Arm Mbed Tls, published October 7, 2023. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.94%, the 61st percentile. Fixed in mbedtls 2.28.5-r0.

References

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