CVE-2023-43615

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

Published: 2023-10-07 Last update: 2026-06-05 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2023-43615 is rated Moderate Risk (48.7/100): CVSS High severity, with medium exploitation likelihood (EPSS 0.31%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2023-43615

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-11-21 0.38% 0.31% -0.07%
2 2025-11-18 0.31% 0.38% +0.07%
3 2025-04-15 — 0.31% —

Full EPSS history (11 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2023-43615

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.5 3.1 HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:N)
Nobody has to click “OK” or open a trap file; it can work without a victim helping.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:H)
Serious risk that confidential data gets exposed in a big way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:N)
Service keeps running; no real outage angle.
 3.9 3.6 [email protected]

Weakness enumeration for CVE-2023-43615

GitHub Security Advisory for CVE-2023-43615

GHSA-656f-g689-89jh · Severity: high — Mbed TLS 2.x before 2.28.5 and 3.x before 3.5.0 has a Buffer Overflow.

OS Trackers for CVE-2023-43615

vendor priority summary link
alpine high CVE-2023-43615: 2 source package rows (mbedtls, mbedtls2); 11 state rows across 11 repos (3.17-main, 3.18-main, 3.19-main, 3.20-community, 3.20-main, 3.21-community, 3.21-main, 3.22-community, 3.22-main, edge-community, edge-main); fixed 11, open 0. https://security.alpinelinux.org/vuln/CVE-2023-43615
debian unimportant CVE-2023-43615 unimportant priority: Debian including 1 source packages (mbedtls), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 3, open 2. https://security-tracker.debian.org/tracker/CVE-2023-43615
gentoo normal CVE-2023-43615: 1 GLSA(s) (202409-14), 1 atom(s) (net-libs/mbedtls); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2023-43615
ubuntu medium CVE-2023-43615 medium priority: Ubuntu including 1 source packages (mbedtls), 12 status rows across 12 suites (bionic, focal, jammy, lunar, mantic, noble, oracular, plucky, questing, trusty, upstream, xenial): ignored 4, needed 4, not-affected 3, released 1. https://ubuntu.com/security/CVE-2023-43615

Affected software / configurations for CVE-2023-43615

Vendor Product Version Raw CPE
arm mbed_tls >= 2.0.0, < 2.28.5 cpe:2.3:a:arm:mbed_tls:*:*:*:*:*:*:*:*
trustedfirmware mbed_tls >= 3.0.0, < 3.5.0 cpe:2.3:a:trustedfirmware:mbed_tls:*:*:*:*:*:*:*:*
fedoraproject fedora 37 cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:*
fedoraproject fedora 38 cpe:2.3:o:fedoraproject:fedora:38:*:*:*:*:*:*:*
fedoraproject fedora 39 cpe:2.3:o:fedoraproject:fedora:39:*:*:*:*:*:*:*

References for CVE-2023-43615

cvelogic Threat Intelligence