ubuntu-cve-2026-40355
Vulnerability from osv_ubuntu
Published
2026-04-28 06:16
Modified
2026-07-09 19:34
Summary
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.
Severity
5.9 (Medium)
7.5 (High)
N/A (UNKNOWN)
References
| URL | Type | |
|---|---|---|
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "krb5-admin-server",
"binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
},
{
"binary_name": "krb5-gss-samples",
"binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
},
{
"binary_name": "krb5-kdc",
"binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
},
{
"binary_name": "krb5-kdc-ldap",
"binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
},
{
"binary_name": "krb5-locales",
"binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
},
{
"binary_name": "krb5-multidev",
"binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
},
{
"binary_name": "krb5-otp",
"binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
},
{
"binary_name": "krb5-pkinit",
"binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
},
{
"binary_name": "krb5-user",
"binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
},
{
"binary_name": "libgssapi-krb5-2",
"binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
},
{
"binary_name": "libgssrpc4",
"binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
},
{
"binary_name": "libk5crypto3",
"binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
},
{
"binary_name": "libkadm5clnt-mit9",
"binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
},
{
"binary_name": "libkadm5srv-mit8",
"binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
},
{
"binary_name": "libkadm5srv-mit9",
"binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
},
{
"binary_name": "libkdb5-7",
"binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
},
{
"binary_name": "libkrad0",
"binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
},
{
"binary_name": "libkrb5-3",
"binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
},
{
"binary_name": "libkrb5support0",
"binary_version": "1.12+dfsg-2ubuntu5.4+esm7"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:14.04:LTS",
"name": "krb5",
"purl": "pkg:deb/ubuntu/krb5@1.12+dfsg-2ubuntu5.4+esm7?arch=source\u0026distro=esm-infra-legacy/trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.10.1+dfsg-6.1ubuntu1",
"1.11.3+dfsg-3ubuntu2",
"1.12+dfsg-2ubuntu1",
"1.12+dfsg-2ubuntu2",
"1.12+dfsg-2ubuntu3",
"1.12+dfsg-2ubuntu4",
"1.12+dfsg-2ubuntu4.2",
"1.12+dfsg-2ubuntu5",
"1.12+dfsg-2ubuntu5.1",
"1.12+dfsg-2ubuntu5.2",
"1.12+dfsg-2ubuntu5.3",
"1.12+dfsg-2ubuntu5.4",
"1.12+dfsg-2ubuntu5.4+esm1",
"1.12+dfsg-2ubuntu5.4+esm2",
"1.12+dfsg-2ubuntu5.4+esm3",
"1.12+dfsg-2ubuntu5.4+esm4",
"1.12+dfsg-2ubuntu5.4+esm5",
"1.12+dfsg-2ubuntu5.4+esm6",
"1.12+dfsg-2ubuntu5.4+esm7"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "krb5-admin-server",
"binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
},
{
"binary_name": "krb5-gss-samples",
"binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
},
{
"binary_name": "krb5-k5tls",
"binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
},
{
"binary_name": "krb5-kdc",
"binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
},
{
"binary_name": "krb5-kdc-ldap",
"binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
},
{
"binary_name": "krb5-locales",
"binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
},
{
"binary_name": "krb5-multidev",
"binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
},
{
"binary_name": "krb5-otp",
"binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
},
{
"binary_name": "krb5-pkinit",
"binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
},
{
"binary_name": "krb5-user",
"binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
},
{
"binary_name": "libgssapi-krb5-2",
"binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
},
{
"binary_name": "libgssrpc4",
"binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
},
{
"binary_name": "libk5crypto3",
"binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
},
{
"binary_name": "libkadm5clnt-mit9",
"binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
},
{
"binary_name": "libkadm5srv-mit9",
"binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
},
{
"binary_name": "libkdb5-8",
"binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
},
{
"binary_name": "libkrad0",
"binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
},
{
"binary_name": "libkrb5-3",
"binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
},
{
"binary_name": "libkrb5support0",
"binary_version": "1.13.2+dfsg-5ubuntu2.2+esm7"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:16.04:LTS",
"name": "krb5",
"purl": "pkg:deb/ubuntu/krb5@1.13.2+dfsg-5ubuntu2.2+esm7?arch=source\u0026distro=esm-infra/xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.13.2+dfsg-2",
"1.13.2+dfsg-3",
"1.13.2+dfsg-4",
"1.13.2+dfsg-5",
"1.13.2+dfsg-5ubuntu1",
"1.13.2+dfsg-5ubuntu2",
"1.13.2+dfsg-5ubuntu2.1",
"1.13.2+dfsg-5ubuntu2.1+esm1",
"1.13.2+dfsg-5ubuntu2.2",
"1.13.2+dfsg-5ubuntu2.2+esm1",
"1.13.2+dfsg-5ubuntu2.2+esm2",
"1.13.2+dfsg-5ubuntu2.2+esm3",
"1.13.2+dfsg-5ubuntu2.2+esm4",
"1.13.2+dfsg-5ubuntu2.2+esm5",
"1.13.2+dfsg-5ubuntu2.2+esm6",
"1.13.2+dfsg-5ubuntu2.2+esm7"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "krb5-admin-server",
"binary_version": "1.16-2ubuntu0.4+esm5"
},
{
"binary_name": "krb5-gss-samples",
"binary_version": "1.16-2ubuntu0.4+esm5"
},
{
"binary_name": "krb5-k5tls",
"binary_version": "1.16-2ubuntu0.4+esm5"
},
{
"binary_name": "krb5-kdc",
"binary_version": "1.16-2ubuntu0.4+esm5"
},
{
"binary_name": "krb5-kdc-ldap",
"binary_version": "1.16-2ubuntu0.4+esm5"
},
{
"binary_name": "krb5-kpropd",
"binary_version": "1.16-2ubuntu0.4+esm5"
},
{
"binary_name": "krb5-locales",
"binary_version": "1.16-2ubuntu0.4+esm5"
},
{
"binary_name": "krb5-multidev",
"binary_version": "1.16-2ubuntu0.4+esm5"
},
{
"binary_name": "krb5-otp",
"binary_version": "1.16-2ubuntu0.4+esm5"
},
{
"binary_name": "krb5-pkinit",
"binary_version": "1.16-2ubuntu0.4+esm5"
},
{
"binary_name": "krb5-user",
"binary_version": "1.16-2ubuntu0.4+esm5"
},
{
"binary_name": "libgssapi-krb5-2",
"binary_version": "1.16-2ubuntu0.4+esm5"
},
{
"binary_name": "libgssrpc4",
"binary_version": "1.16-2ubuntu0.4+esm5"
},
{
"binary_name": "libk5crypto3",
"binary_version": "1.16-2ubuntu0.4+esm5"
},
{
"binary_name": "libkadm5clnt-mit11",
"binary_version": "1.16-2ubuntu0.4+esm5"
},
{
"binary_name": "libkadm5srv-mit11",
"binary_version": "1.16-2ubuntu0.4+esm5"
},
{
"binary_name": "libkdb5-9",
"binary_version": "1.16-2ubuntu0.4+esm5"
},
{
"binary_name": "libkrad0",
"binary_version": "1.16-2ubuntu0.4+esm5"
},
{
"binary_name": "libkrb5-3",
"binary_version": "1.16-2ubuntu0.4+esm5"
},
{
"binary_name": "libkrb5support0",
"binary_version": "1.16-2ubuntu0.4+esm5"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:18.04:LTS",
"name": "krb5",
"purl": "pkg:deb/ubuntu/krb5@1.16-2ubuntu0.4+esm5?arch=source\u0026distro=esm-infra/bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.15.1-2",
"1.16-2",
"1.16-2build1",
"1.16-2ubuntu0.1",
"1.16-2ubuntu0.1+esm1",
"1.16-2ubuntu0.2",
"1.16-2ubuntu0.3",
"1.16-2ubuntu0.4",
"1.16-2ubuntu0.4+esm1",
"1.16-2ubuntu0.4+esm2",
"1.16-2ubuntu0.4+esm3",
"1.16-2ubuntu0.4+esm5"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "krb5-admin-server",
"binary_version": "1.17-6ubuntu4.11"
},
{
"binary_name": "krb5-gss-samples",
"binary_version": "1.17-6ubuntu4.11"
},
{
"binary_name": "krb5-k5tls",
"binary_version": "1.17-6ubuntu4.11"
},
{
"binary_name": "krb5-kdc",
"binary_version": "1.17-6ubuntu4.11"
},
{
"binary_name": "krb5-kdc-ldap",
"binary_version": "1.17-6ubuntu4.11"
},
{
"binary_name": "krb5-kpropd",
"binary_version": "1.17-6ubuntu4.11"
},
{
"binary_name": "krb5-locales",
"binary_version": "1.17-6ubuntu4.11"
},
{
"binary_name": "krb5-multidev",
"binary_version": "1.17-6ubuntu4.11"
},
{
"binary_name": "krb5-otp",
"binary_version": "1.17-6ubuntu4.11"
},
{
"binary_name": "krb5-pkinit",
"binary_version": "1.17-6ubuntu4.11"
},
{
"binary_name": "krb5-user",
"binary_version": "1.17-6ubuntu4.11"
},
{
"binary_name": "libgssapi-krb5-2",
"binary_version": "1.17-6ubuntu4.11"
},
{
"binary_name": "libgssrpc4",
"binary_version": "1.17-6ubuntu4.11"
},
{
"binary_name": "libk5crypto3",
"binary_version": "1.17-6ubuntu4.11"
},
{
"binary_name": "libkadm5clnt-mit11",
"binary_version": "1.17-6ubuntu4.11"
},
{
"binary_name": "libkadm5srv-mit11",
"binary_version": "1.17-6ubuntu4.11"
},
{
"binary_name": "libkdb5-9",
"binary_version": "1.17-6ubuntu4.11"
},
{
"binary_name": "libkrad0",
"binary_version": "1.17-6ubuntu4.11"
},
{
"binary_name": "libkrb5-3",
"binary_version": "1.17-6ubuntu4.11"
},
{
"binary_name": "libkrb5support0",
"binary_version": "1.17-6ubuntu4.11"
}
]
},
"package": {
"ecosystem": "Ubuntu:20.04:LTS",
"name": "krb5",
"purl": "pkg:deb/ubuntu/krb5@1.17-6ubuntu4.11?arch=source\u0026distro=focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.17-6",
"1.17-6ubuntu3",
"1.17-6ubuntu4",
"1.17-6ubuntu4.1",
"1.17-6ubuntu4.2",
"1.17-6ubuntu4.3",
"1.17-6ubuntu4.4",
"1.17-6ubuntu4.6",
"1.17-6ubuntu4.7",
"1.17-6ubuntu4.8",
"1.17-6ubuntu4.9",
"1.17-6ubuntu4.11"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "krb5-admin-server",
"binary_version": "1.19.2-2ubuntu0.7"
},
{
"binary_name": "krb5-gss-samples",
"binary_version": "1.19.2-2ubuntu0.7"
},
{
"binary_name": "krb5-k5tls",
"binary_version": "1.19.2-2ubuntu0.7"
},
{
"binary_name": "krb5-kdc",
"binary_version": "1.19.2-2ubuntu0.7"
},
{
"binary_name": "krb5-kdc-ldap",
"binary_version": "1.19.2-2ubuntu0.7"
},
{
"binary_name": "krb5-kpropd",
"binary_version": "1.19.2-2ubuntu0.7"
},
{
"binary_name": "krb5-locales",
"binary_version": "1.19.2-2ubuntu0.7"
},
{
"binary_name": "krb5-multidev",
"binary_version": "1.19.2-2ubuntu0.7"
},
{
"binary_name": "krb5-otp",
"binary_version": "1.19.2-2ubuntu0.7"
},
{
"binary_name": "krb5-pkinit",
"binary_version": "1.19.2-2ubuntu0.7"
},
{
"binary_name": "krb5-user",
"binary_version": "1.19.2-2ubuntu0.7"
},
{
"binary_name": "libgssapi-krb5-2",
"binary_version": "1.19.2-2ubuntu0.7"
},
{
"binary_name": "libgssrpc4",
"binary_version": "1.19.2-2ubuntu0.7"
},
{
"binary_name": "libk5crypto3",
"binary_version": "1.19.2-2ubuntu0.7"
},
{
"binary_name": "libkadm5clnt-mit12",
"binary_version": "1.19.2-2ubuntu0.7"
},
{
"binary_name": "libkadm5srv-mit12",
"binary_version": "1.19.2-2ubuntu0.7"
},
{
"binary_name": "libkdb5-10",
"binary_version": "1.19.2-2ubuntu0.7"
},
{
"binary_name": "libkrad0",
"binary_version": "1.19.2-2ubuntu0.7"
},
{
"binary_name": "libkrb5-3",
"binary_version": "1.19.2-2ubuntu0.7"
},
{
"binary_name": "libkrb5support0",
"binary_version": "1.19.2-2ubuntu0.7"
}
]
},
"package": {
"ecosystem": "Ubuntu:22.04:LTS",
"name": "krb5",
"purl": "pkg:deb/ubuntu/krb5@1.19.2-2ubuntu0.7?arch=source\u0026distro=jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.18.3-6",
"1.18.3-7",
"1.19.2-0ubuntu1",
"1.19.2-1",
"1.19.2-2",
"1.19.2-2ubuntu0.1",
"1.19.2-2ubuntu0.2",
"1.19.2-2ubuntu0.3",
"1.19.2-2ubuntu0.4",
"1.19.2-2ubuntu0.5",
"1.19.2-2ubuntu0.6",
"1.19.2-2ubuntu0.7"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "krb5-admin-server",
"binary_version": "1.20.1-6ubuntu2.6"
},
{
"binary_name": "krb5-gss-samples",
"binary_version": "1.20.1-6ubuntu2.6"
},
{
"binary_name": "krb5-k5tls",
"binary_version": "1.20.1-6ubuntu2.6"
},
{
"binary_name": "krb5-kdc",
"binary_version": "1.20.1-6ubuntu2.6"
},
{
"binary_name": "krb5-kdc-ldap",
"binary_version": "1.20.1-6ubuntu2.6"
},
{
"binary_name": "krb5-kpropd",
"binary_version": "1.20.1-6ubuntu2.6"
},
{
"binary_name": "krb5-locales",
"binary_version": "1.20.1-6ubuntu2.6"
},
{
"binary_name": "krb5-multidev",
"binary_version": "1.20.1-6ubuntu2.6"
},
{
"binary_name": "krb5-otp",
"binary_version": "1.20.1-6ubuntu2.6"
},
{
"binary_name": "krb5-pkinit",
"binary_version": "1.20.1-6ubuntu2.6"
},
{
"binary_name": "krb5-user",
"binary_version": "1.20.1-6ubuntu2.6"
},
{
"binary_name": "libgssapi-krb5-2",
"binary_version": "1.20.1-6ubuntu2.6"
},
{
"binary_name": "libgssrpc4t64",
"binary_version": "1.20.1-6ubuntu2.6"
},
{
"binary_name": "libk5crypto3",
"binary_version": "1.20.1-6ubuntu2.6"
},
{
"binary_name": "libkadm5clnt-mit12",
"binary_version": "1.20.1-6ubuntu2.6"
},
{
"binary_name": "libkadm5srv-mit12",
"binary_version": "1.20.1-6ubuntu2.6"
},
{
"binary_name": "libkdb5-10t64",
"binary_version": "1.20.1-6ubuntu2.6"
},
{
"binary_name": "libkrad0",
"binary_version": "1.20.1-6ubuntu2.6"
},
{
"binary_name": "libkrb5-3",
"binary_version": "1.20.1-6ubuntu2.6"
},
{
"binary_name": "libkrb5support0",
"binary_version": "1.20.1-6ubuntu2.6"
}
]
},
"package": {
"ecosystem": "Ubuntu:24.04:LTS",
"name": "krb5",
"purl": "pkg:deb/ubuntu/krb5@1.20.1-6ubuntu2.6?arch=source\u0026distro=noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.20.1-3ubuntu1",
"1.20.1-5build1",
"1.20.1-6ubuntu1",
"1.20.1-6ubuntu2",
"1.20.1-6ubuntu2.1",
"1.20.1-6ubuntu2.2",
"1.20.1-6ubuntu2.3",
"1.20.1-6ubuntu2.4",
"1.20.1-6ubuntu2.5",
"1.20.1-6ubuntu2.6"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "krb5-admin-server",
"binary_version": "1.21.3-5ubuntu2"
},
{
"binary_name": "krb5-gss-samples",
"binary_version": "1.21.3-5ubuntu2"
},
{
"binary_name": "krb5-k5tls",
"binary_version": "1.21.3-5ubuntu2"
},
{
"binary_name": "krb5-kdc",
"binary_version": "1.21.3-5ubuntu2"
},
{
"binary_name": "krb5-kdc-ldap",
"binary_version": "1.21.3-5ubuntu2"
},
{
"binary_name": "krb5-kpropd",
"binary_version": "1.21.3-5ubuntu2"
},
{
"binary_name": "krb5-locales",
"binary_version": "1.21.3-5ubuntu2"
},
{
"binary_name": "krb5-multidev",
"binary_version": "1.21.3-5ubuntu2"
},
{
"binary_name": "krb5-otp",
"binary_version": "1.21.3-5ubuntu2"
},
{
"binary_name": "krb5-pkinit",
"binary_version": "1.21.3-5ubuntu2"
},
{
"binary_name": "krb5-user",
"binary_version": "1.21.3-5ubuntu2"
},
{
"binary_name": "libgssapi-krb5-2",
"binary_version": "1.21.3-5ubuntu2"
},
{
"binary_name": "libgssrpc4t64",
"binary_version": "1.21.3-5ubuntu2"
},
{
"binary_name": "libk5crypto3",
"binary_version": "1.21.3-5ubuntu2"
},
{
"binary_name": "libkadm5clnt-mit12",
"binary_version": "1.21.3-5ubuntu2"
},
{
"binary_name": "libkadm5srv-mit12",
"binary_version": "1.21.3-5ubuntu2"
},
{
"binary_name": "libkdb5-10t64",
"binary_version": "1.21.3-5ubuntu2"
},
{
"binary_name": "libkrad0",
"binary_version": "1.21.3-5ubuntu2"
},
{
"binary_name": "libkrb5-3",
"binary_version": "1.21.3-5ubuntu2"
},
{
"binary_name": "libkrb5support0",
"binary_version": "1.21.3-5ubuntu2"
}
]
},
"package": {
"ecosystem": "Ubuntu:25.10",
"name": "krb5",
"purl": "pkg:deb/ubuntu/krb5@1.21.3-5ubuntu2?arch=source\u0026distro=questing"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.21.3-4ubuntu2",
"1.21.3-5ubuntu1",
"1.21.3-5ubuntu2"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "krb5-admin-server",
"binary_version": "1.22.1-2ubuntu4"
},
{
"binary_name": "krb5-gss-samples",
"binary_version": "1.22.1-2ubuntu4"
},
{
"binary_name": "krb5-k5tls",
"binary_version": "1.22.1-2ubuntu4"
},
{
"binary_name": "krb5-kdc",
"binary_version": "1.22.1-2ubuntu4"
},
{
"binary_name": "krb5-kdc-ldap",
"binary_version": "1.22.1-2ubuntu4"
},
{
"binary_name": "krb5-kpropd",
"binary_version": "1.22.1-2ubuntu4"
},
{
"binary_name": "krb5-locales",
"binary_version": "1.22.1-2ubuntu4"
},
{
"binary_name": "krb5-multidev",
"binary_version": "1.22.1-2ubuntu4"
},
{
"binary_name": "krb5-otp",
"binary_version": "1.22.1-2ubuntu4"
},
{
"binary_name": "krb5-pkinit",
"binary_version": "1.22.1-2ubuntu4"
},
{
"binary_name": "krb5-user",
"binary_version": "1.22.1-2ubuntu4"
},
{
"binary_name": "libgssapi-krb5-2",
"binary_version": "1.22.1-2ubuntu4"
},
{
"binary_name": "libgssrpc4t64",
"binary_version": "1.22.1-2ubuntu4"
},
{
"binary_name": "libk5crypto3",
"binary_version": "1.22.1-2ubuntu4"
},
{
"binary_name": "libkadm5clnt-mit12",
"binary_version": "1.22.1-2ubuntu4"
},
{
"binary_name": "libkadm5srv-mit12",
"binary_version": "1.22.1-2ubuntu4"
},
{
"binary_name": "libkdb5-10t64",
"binary_version": "1.22.1-2ubuntu4"
},
{
"binary_name": "libkrad0",
"binary_version": "1.22.1-2ubuntu4"
},
{
"binary_name": "libkrb5-3",
"binary_version": "1.22.1-2ubuntu4"
},
{
"binary_name": "libkrb5support0",
"binary_version": "1.22.1-2ubuntu4"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "krb5",
"purl": "pkg:deb/ubuntu/krb5@1.22.1-2ubuntu4?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.21.3-5ubuntu2",
"1.22.1-2",
"1.22.1-2ubuntu2",
"1.22.1-2ubuntu3",
"1.22.1-2ubuntu4"
]
}
],
"aliases": [],
"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.",
"id": "UBUNTU-CVE-2026-40355",
"modified": "2026-07-09T19:34:23Z",
"published": "2026-04-28T06:16:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-40355"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-40355"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-40355"
]
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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