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Fencer Intel
critical 9.1

CVE-2022-35409 json

An issue was discovered in Mbed TLS before 2.28.1 and 3.x before 3.2.0

published 4y ago modified 3mo ago also EUVD-2022-38299 , JLSEC-2025-218

cvss
9.1
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
2.3%
EPSS 2.3% chance of exploitation in 30 days, percentile 83%
public exploits
0
none known

Summary

An issue was discovered in Mbed TLS before 2.28.1 and 3.x before 3.2.0. In some configurations, an unauthenticated attacker can send an invalid ClientHello message to a DTLS server that causes a heap-based buffer over-read of up to 255 bytes. This can cause a server crash or possibly information disclosure based on error responses. Affected configurations have MBEDTLS_SSL_DTLS_CLIENT_PORT_REUSE enabled and MBEDTLS_SSL_IN_CONTENT_LEN less than a threshold that depends on the configuration: 258 bytes if using mbedtls_ssl_cookie_check, and possibly up to 571 bytes with a custom cookie check function.

Patch / fix

  • julia MbedTLS_jll 2.28.2+0
  • arm mbed_tls 2.28.1
  • trustedfirmware mbed_tls 3.2.0
  • mbedtls Debian 14, Debian 13, Debian 12 2.28.1-1

debian advisories DEBIAN-CVE-2022-35409

  • mbedtls-3 openSUSE Tumbleweed 3.6.6-1.1
  • mbedtls-2 openSUSE Tumbleweed 2.28.1-1.1
  • mbedtls Package Hub 15 SP3, openSUSE Leap 15.3 2.16.9-bp153.2.8.1

opensuse advisories openSUSE-SU-2026:11119-1openSUSE-SU-2024:12478-1openSUSE-SU-2022:10247-1

  • mbedtls Alpine 3.24, Alpine 3.23, Alpine 3.22 +6 more 2.28.1-r0
  • mbedtls2 Alpine 3.24, Alpine 3.23, Alpine 3.22 +2 more 2.28.1-r0
  • mbedtls3 Alpine 3.24 2.28.1-r0

alpine advisories ALPINE-CVE-2022-35409

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

Is CVE-2022-35409 in your dependencies? Fencer shows which of your repositories are affected as soon as an advisory lands, and opens the fix as a pull request.

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2022-35409 updated cvss 6.5

mbedtls: unauthenticated attacker can send invalid ClientHello leads to heap-based buffer over-read

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

2.30% chance of exploitation in the next 30 days, higher than 83% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • mbed-tls.readthedocs.io https://mbed-tls.readthedocs.io/en/latest/security-advisories/advisories/mbedtls-security-advisory-2022-07.html referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
OSV 3.1 9.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Affected packages

ecosystem package affected fixed in
julia MbedTLS_jll
<2.28.2+0
2.28.2+0

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.