DEBIAN-CVE-2026-77205

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Source
https://security-tracker.debian.org/tracker/CVE-2026-77205
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77205.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-77205
Upstream
  • CVE-2026-77205
Published
2026-10-13T22:18:24Z
Modified
2026-10-14T10:00:12Z
Severity
  • 3.7 (Low) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L CVSS Calculator
Summary
[none]
Details

Libreswan in FIPS mode has a vulnerability where badly formed received certificates are rejected, but not deleted from the NSS cache. As a result, any real certificates with the same serial number are rejected as well. This can be abused to lock out legitimate peers from connecting. The add_decoded_cert() function missed a call to CERT_DestroyCertificate() due to an incorrect fix for CVE-2026-14957. Sending bogus certificates with new serial numbers could prevent the real certificates with those serial numbers from connecting until the service has restarted.

References

Affected packages

Debian:12 / libreswan

Package

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

Affected ranges

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

Affected versions

4.*
4.10-2
4.10-2+deb12u1
4.11-1
4.12-1
4.12-2
4.12-3
4.14-1
4.14-1.1
4.15-1
5.*
5.0~rc2-1
5.0~rc2-2
5.2-1
5.2-2
5.2-2.1
5.2-2.2
5.2-2.3
5.2-2.4
5.2-2.5

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77205.json"

Debian:13 / libreswan

Package

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

Affected ranges

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

Affected versions

5.*
5.2-2.2
5.2-2.3
5.2-2.4
5.2-2.5

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77205.json"

Debian:14 / libreswan

Package

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

Affected ranges

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

Affected versions

5.*
5.2-2.2
5.2-2.3
5.2-2.4
5.2-2.5

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-77205.json"