UBUNTU-CVE-2026-93602

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Source
https://ubuntu.com/security/CVE-2026-93602
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93602.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-93602
Upstream
Published
2026-09-18T14:19:00Z
Modified
2026-09-23T23:40:09Z
Severity
  • 4.4 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
  • 5.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

rustls-webpki versions before 0.103.10 and 0.104.0-alpha.5 contain faulty CRL authority-matching logic that compares only the first distributionPoint against each CRL's IssuingDistributionPoint, ignoring additional distributionPoints. Attackers with a compromised trusted issuing authority can present revoked certificates that pass revocation checks under UnknownStatusPolicy::Allow, or cause incorrect errors under the default deny policy.

References

Affected packages

Ubuntu:24.04:LTS / rust-rustls-webpki

Package

Name
rust-rustls-webpki
Purl
pkg:deb/ubuntu/rust-rustls-webpki?arch=source&distro=noble

Affected ranges

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

Affected versions

0.*
0.101.4-4
0.101.7-2.1

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "librust-rustls-webpki-dev",
            "binary_version":  "0.101.7-2.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93602.json"

Ubuntu:26.04:LTS / rust-rustls-webpki

Package

Name
rust-rustls-webpki
Purl
pkg:deb/ubuntu/rust-rustls-webpki?arch=source&distro=resolute

Affected ranges

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

Affected versions

0.*
0.102.8-5
0.103.7-1
0.103.7-1build1
0.103.9+ds-1
0.103.9+ds-2

Ecosystem specific 

{
    "binaries":  [
        {
            "binary_name":  "librust-rustls-webpki-dev",
            "binary_version":  "0.103.9+ds-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-93602.json"