TLS 1.3 client ticket store crashed by NewSessionTicket with empty early_data extension in ssl (Erlang OTP)

CVE-2026-94200
HIGH 8.2

At a glance

Source
NVD
EPSS
EPSS 0.46 % · percentile 40 ()
State
PUBLISHED
Published
Updated
Assigner
EEF
NVD status
Deferred

Description

Improper Validation of Consistency within Input vulnerability in Erlang OTP ssl (tls_handshake_1_3, ssl_handshake and tls_client_ticket_store modules) allows a malicious TLS 1.3 server to cause a denial of service of the ssl application on the client node. The TLS 1.3 client decodes the extensions of a NewSessionTicket message as if they came from EncryptedExtensions. It therefore accepts a 0-length early_data extension, a form that is only valid in ClientHello and EncryptedExtensions. With {session_tickets, auto}, the client stores the ticket in the node-global tls_client_ticket_store. On the next automatic resumption, tls_handshake_1_3:get_max_early_data/1 crashes the store with a case_clause. Repeated crashes can exceed the restart intensity of the ssl supervisors, which use the rest_for_one strategy, and take down ssl for all connections on the node. This issue affects OTP from OTP 23.3 before OTP 27.3.4.19, OTP 28.5.0.8, and OTP 29.1.2, corresponding to ssl from 10.3 before 11.2.12.14, 11.6.0.7, and 11.7.8.

Weaknesses (CWE)

  • CWE-1288 — Improper Validation of Consistency within Input

References

Scores

VersionScoreVectorScored by
CVSS 4.0HIGH 8.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NEEF
CVSS 4.0HIGH 8.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XNVD · 6b3ad84c-e1a6-4bf7-a703-f496b71e49db (Secondary)

European references

Affected products

ProductVersions
Erlang · OTPaffected 23.3 < *
Erlang · OTPaffected 10.3 < *
Erlang · OTPaffected 0abe6f66db0d295cd06b0efab3bdb3caa2803930 < *

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD