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vulnerabilityCVE-2026-3549
Name
CVE-2026-3549
Source
NVD ( link)Debian ( link)
Description
Heap Overflow in TLS 1.3 ECH parsing. An integer underflow existed in ECH extension parsing logic when calculating a buffer length, which resulted in writing beyond the bounds of an allocated buffer. Note that in wolfSSL, ECH is off by default, and the ECH standard is still evolving.
Published Date
Updated Date
Workaround
-

Analysis#


Affected Component
Analysis
wolfssl
Exploitable

Vulnerability Ratings#


8.3
CVSSv4
9.8
CVSSv31
NaN
other

Others affected components#


Name
Project
Project Version
Version
Status
buildroot
2025.02.x
5.9.1
Not Affected
buildroot
master
5.9.1
Not Affected
openwrt
master
5.9.1-r1
Not Affected
openwrt
openwrt-25.12
5.9.1-r1
Not Affected
yocto
kirkstone
5.2.0
Exploitable
yocto
master
5.9.1
Not Affected