UBUNTU-CVE-2026-94417

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Source

https://ubuntu.com/security/CVE-2026-94417

Import Source

https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-94417.json

JSON Data

https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-94417

Upstream

CVE-2026-94417

Published

2026-09-27T10:16:00Z

Modified

2026-10-01T00:22:42Z

Severity

2.3 (Low) CVSS_V4 - CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N CVSS Calculator
5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:N CVSS Calculator
Ubuntu - medium

Summary

[none]

Details

When an application enables both OCSP and CRL revocation checking on one WOLFSSL_CTX or certificate manager, wolfSSL skips the CRL check for any peer certificate that carries no Authority Information Access OCSP URL, and accepts a certificate the loaded CRL lists as revoked. The soft-fail policy for a missing responder collapses the OCSP result onto success before the code decides whether the CRL fallback is still needed, so "no responder exists" becomes indistinguishable from "the responder answered good". Affected builds define both HAVE_OCSP and HAVE_CRL: --enable-ocsp --enable-crl directly, and implicitly --enable-all, --enable-distro, --enable-curl, --enable-nginx, --enable-haproxy, --enable-stunnel, --enable-lighty, --enable-wpas, --enable-strongswan, --enable-mosquitto, --enable-jni, --enable-openvpn and --enable-krb. An application is affected only if it calls both wolfSSL_CTX_EnableOCSP() (or wolfSSL_EnableOCSP() / wolfSSL_CertManagerEnableOCSP()) and wolfSSL_CTX_EnableCRL() (or the equivalents) with a CRL loaded; an application that uses OCSP stapling alone through wolfSSL_CTX_EnableOCSPStapling() is not affected, because that sets up a separate OCSP instance. The defect sits in ProcessPeerCerts() and is reachable over TLS 1.0 through TLS 1.3 and DTLS, both on a client verifying a server certificate and on a server verifying a client certificate under mutual or post-handshake authentication. When the skipped check falls on a chain certificate rather than the leaf, the unchecked intermediate is promoted into the certificate manager and stays a trusted signer for every later connection on that context, so an affected long-running process needs its WOLFSSL_CTX torn down and not only its library replaced. All wolfSSL versions from 5.9.2 and earlier are affected; on versions 5.9.1 and 5.9.2 the WOLFSSL_OCSP_CHECKALL configuration fails closed with OCSP_NEED_URL, which leaves wolfSSL_CTX_EnableOCSP() without CHECKALL as the exposed configuration on 5.9.2.

References

Affected packages

Ubuntu:16.04:LTS

wolfssl

Package

Name: wolfssl
Purl: pkg:deb/ubuntu/wolfssl?arch=source&distro=xenial

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.4.8+dfsg-1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libcyassl5",
            "binary_version":  "3.4.8+dfsg-1"
        },
        {
            "binary_name":  "libwolfssl0",
            "binary_version":  "3.4.8+dfsg-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-94417.json"

Ubuntu:18.04:LTS

wolfssl

Package

Name: wolfssl
Purl: pkg:deb/ubuntu/wolfssl?arch=source&distro=bionic

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

3.*

3.10.2+dfsg-2

3.12.0+dfsg-1

3.12.2+dfsg-1

3.13.0+dfsg-1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libwolfssl15",
            "binary_version":  "3.13.0+dfsg-1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-94417.json"

Ubuntu:20.04:LTS

wolfssl

Package

Name: wolfssl
Purl: pkg:deb/ubuntu/wolfssl?arch=source&distro=focal

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.1.0+dfsg-2

4.2.0+dfsg-1

4.2.0+dfsg-2

4.2.0+dfsg-3

4.3.0+dfsg-2

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libwolfssl24",
            "binary_version":  "4.3.0+dfsg-2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-94417.json"

Ubuntu:22.04:LTS

wolfssl

Package

Name: wolfssl
Purl: pkg:deb/ubuntu/wolfssl?arch=source&distro=jammy

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

4.*

4.6.0-3

5.*

5.0.0-1

5.1.1-1

5.2.0-1

5.2.0-2

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libwolfssl32",
            "binary_version":  "5.2.0-2"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-94417.json"

Ubuntu:24.04:LTS

wolfssl

Package

Name: wolfssl
Purl: pkg:deb/ubuntu/wolfssl?arch=source&distro=noble

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.5.4-2

5.5.4-2.1

5.6.4-2

5.6.6-1.2

5.6.6-1.3

5.6.6-1.3build1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libwolfssl42t64",
            "binary_version":  "5.6.6-1.3build1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-94417.json"

Ubuntu:26.04:LTS

wolfssl

Package

Name: wolfssl
Purl: pkg:deb/ubuntu/wolfssl?arch=source&distro=resolute

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.7.2-0.1

5.8.2-1.2

5.8.4-1

5.9.1-0.1

Ecosystem specific

{
    "binaries":  [
        {
            "binary_name":  "libwolfssl44",
            "binary_version":  "5.9.1-0.1"
        }
    ]
}

Database specific

source

"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-94417.json"