DEBIAN-CVE-2026-25833: mbedtls security update

DEBIAN-CVE-2026-25833, released April 1, 2026, fixes 1 CVE in mbedtls (version 3.6.6-0.1). None of them is reported as exploited. Patch Radar priority: High.

High

CVEs closed

None rated Critical

Exploited

None reported

Highest CVSS

7.5

Base score, 0 to 10

Highest EPSS

0.0032

25th percentile

Fixed package versions

Product	Release	Fixed in
mbedtls	Debian 14	3.6.6-0.1

CVEs this fix closes

Priority	CVE	Title	CVSS	EPSS	Exploitation
High	CVE-2026-25833	mbedtls: Mbed TLS 3.5.0 to 3.6.5 fixed in 3.6.6 and 4.1.0 has a buffer overflow in the x509_inet_pton_ipv6() function	7.5	0.0032	None reported

Also fixes CVE-2026-25833

OPENSUSE-SU-2026:21144-1
mbedtls on opensuse-leap 16.0
SUSE-SU-2026:22016-1
ovmf on sles 16.0

Vendor advisory

https://security-tracker.debian.org/tracker/CVE-2026-25833

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