DEBIAN-CVE-2026-40355

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Source
https://security-tracker.debian.org/tracker/CVE-2026-40355
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40355.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-40355
Upstream
Published
2026-04-28T06:16:03Z
Modified
2026-09-14T17:03:11Z
Severity
  • 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

In MIT Kerberos 5 (aka krb5) before 1.22.3, there is a NULL pointer dereference if an application calls gss_accept_sec_context() on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger this, causing the process to terminate in parse_nego_message.

References

Affected packages

Debian:12 / krb5

Package

Name
krb5
Purl
pkg:deb/debian/krb5?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.20.1-2+deb12u5

Affected versions

1.*
1.20.1-2
1.20.1-2+deb12u1
1.20.1-2+deb12u2
1.20.1-2+deb12u3
1.20.1-2+deb12u4

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40355.json"

Debian:13 / krb5

Package

Name
krb5
Purl
pkg:deb/debian/krb5?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.21.3-5+deb13u1

Affected versions

1.*
1.21.3-5

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40355.json"

Debian:14 / krb5

Package

Name
krb5
Purl
pkg:deb/debian/krb5?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
1.22.1-2.1

Affected versions

1.*
1.21.3-5
1.22.1-1
1.22.1-2

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-40355.json"