DEBIAN-CVE-2026-34877

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Source
https://security-tracker.debian.org/tracker/CVE-2026-34877
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34877.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-34877
Upstream
Published
2026-04-02T17:16:26Z
Modified
2026-09-14T17:03:28Z
Severity
  • 9.8 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
Summary
[none]
Details

An issue was discovered in Mbed TLS versions from 2.19.0 up to 3.6.5, Mbed TLS 4.0.0. Insufficient protection of serialized SSL context or session structures allows an attacker who can modify the serialized structures to induce memory corruption, leading to arbitrary code execution. This is caused by Incorrect Use of Privileged APIs.

References

Affected packages

Debian:12 / mbedtls

Package

Name
mbedtls
Purl
pkg:deb/debian/mbedtls?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

2.*
2.28.3-1
2.28.4-1
2.28.5-1
2.28.6-1
2.28.7-1
2.28.7-1.1~exp1
2.28.7-1.1
2.28.8-1
3.*
3.6.0-1
3.6.0-2
3.6.0-3
3.6.2-1
3.6.2-2
3.6.2-3
3.6.3-1
3.6.4-1
3.6.4-2
3.6.5-0.1~deb13u1
3.6.5-0.1
3.6.6-0.1~deb13u1
3.6.6-0.1
3.6.7-2
3.6.7-3

Ecosystem specific 

{
    "urgency": "unimportant"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34877.json"

Debian:13 / mbedtls

Package

Name
mbedtls
Purl
pkg:deb/debian/mbedtls?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

3.*
3.6.4-2
3.6.5-0.1~deb13u1
3.6.5-0.1
3.6.6-0.1~deb13u1
3.6.6-0.1
3.6.7-2
3.6.7-3

Ecosystem specific 

{
    "urgency": "unimportant"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34877.json"

Debian:14 / mbedtls

Package

Name
mbedtls
Purl
pkg:deb/debian/mbedtls?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.6.6-0.1

Affected versions

3.*
3.6.4-2
3.6.5-0.1~deb13u1
3.6.5-0.1
3.6.6-0.1~deb13u1

Ecosystem specific 

{
    "urgency": "unimportant"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-34877.json"