CVE-2017-18187

9.8 criticalEPSS 3.1%

Critical (9.8). EPSS 3.1% chance of exploitation in the next 30 days.

In ARM mbed TLS before 2.7.0, there is a bounds-check bypass through an integer overflow in PSK identity parsing in the ssl_parse_client_psk_identity() function in library/ssl_srv.c.

Severity

CVSS 3.0

9.8 critical

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 3.1% chance of exploitation in the next 30 days; higher than 87% of CVEs (scores of 2026-10-31)
CWE: CWE-190
Published: 2018-02-14
Modified: 2026-06-17
Record from: the NVD, synced 2026-10-19

Affected

arm:mbed_tls
debian:debian_linux

References

http://www.securityfocus.com/bid/103055
https://github.com/ARMmbed/mbedtls/blob/master/ChangeLog
https://github.com/ARMmbed/mbedtls/commit/83c9f495ffe70c7dd280b41fdfd4881485a3bc28
https://security.gentoo.org/glsa/201804-19
https://usn.ubuntu.com/4267-1/

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