OESA-2026-2257

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Source
https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-2257
Import Source
https://repo.openeuler.org/security/data/osv/OESA-2026-2257.json
JSON Data
https://api.osv.dev/v1/vulns/OESA-2026-2257
Upstream
  • CVE-2026-40355
  • CVE-2026-40356
Published
2026-05-09T12:33:25Z
Modified
2026-05-09T12:48:29.474410Z
Summary
krb5 security update
Details

Kerberos is a network authentication protocol. It is designed to provide strong authentication for client/server applications by using secret-key cryptography.

Security Fix(es):

In MIT Kerberos 5 (aka krb5) before 1.22.3, there is a NULL pointer dereference if an application calls gssacceptseccontext() 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 parsenego_message.(CVE-2026-40355)

In MIT Kerberos 5 (aka krb5) before 1.22.3, there is an integer underflow and resultant out-of-bounds read if an application calls gssacceptseccontext() on a system with a NegoEx mechanism registered in /etc/gss/mech. An unauthenticated remote attacker can trigger this, possibly causing the process to terminate in parsemessage.(CVE-2026-40356)

Database specific 
{
    "severity": "Medium"
}
References

Affected packages

openEuler:20.03-LTS-SP4
krb5

Package

Name
krb5
Purl
pkg:rpm/openEuler/krb5&distro=openEuler-20.03-LTS-SP4

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.18.2-23.oe2003sp4

Ecosystem specific 

{
    "src": [
        "krb5-1.18.2-23.oe2003sp4.src.rpm"
    ],
    "aarch64": [
        "krb5-1.18.2-23.oe2003sp4.aarch64.rpm",
        "krb5-client-1.18.2-23.oe2003sp4.aarch64.rpm",
        "krb5-debuginfo-1.18.2-23.oe2003sp4.aarch64.rpm",
        "krb5-debugsource-1.18.2-23.oe2003sp4.aarch64.rpm",
        "krb5-devel-1.18.2-23.oe2003sp4.aarch64.rpm",
        "krb5-libs-1.18.2-23.oe2003sp4.aarch64.rpm",
        "krb5-server-1.18.2-23.oe2003sp4.aarch64.rpm"
    ],
    "x86_64": [
        "krb5-1.18.2-23.oe2003sp4.x86_64.rpm",
        "krb5-client-1.18.2-23.oe2003sp4.x86_64.rpm",
        "krb5-debuginfo-1.18.2-23.oe2003sp4.x86_64.rpm",
        "krb5-debugsource-1.18.2-23.oe2003sp4.x86_64.rpm",
        "krb5-devel-1.18.2-23.oe2003sp4.x86_64.rpm",
        "krb5-libs-1.18.2-23.oe2003sp4.x86_64.rpm",
        "krb5-server-1.18.2-23.oe2003sp4.x86_64.rpm"
    ],
    "noarch": [
        "krb5-help-1.18.2-23.oe2003sp4.noarch.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-2257.json"
openEuler:22.03-LTS-SP4
krb5

Package

Name
krb5
Purl
pkg:rpm/openEuler/krb5&distro=openEuler-22.03-LTS-SP4

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.19.2-30.oe2203sp4

Ecosystem specific 

{
    "src": [
        "krb5-1.19.2-30.oe2203sp4.src.rpm"
    ],
    "aarch64": [
        "krb5-1.19.2-30.oe2203sp4.aarch64.rpm",
        "krb5-client-1.19.2-30.oe2203sp4.aarch64.rpm",
        "krb5-debuginfo-1.19.2-30.oe2203sp4.aarch64.rpm",
        "krb5-debugsource-1.19.2-30.oe2203sp4.aarch64.rpm",
        "krb5-devel-1.19.2-30.oe2203sp4.aarch64.rpm",
        "krb5-libs-1.19.2-30.oe2203sp4.aarch64.rpm",
        "krb5-server-1.19.2-30.oe2203sp4.aarch64.rpm"
    ],
    "x86_64": [
        "krb5-1.19.2-30.oe2203sp4.x86_64.rpm",
        "krb5-client-1.19.2-30.oe2203sp4.x86_64.rpm",
        "krb5-debuginfo-1.19.2-30.oe2203sp4.x86_64.rpm",
        "krb5-debugsource-1.19.2-30.oe2203sp4.x86_64.rpm",
        "krb5-devel-1.19.2-30.oe2203sp4.x86_64.rpm",
        "krb5-libs-1.19.2-30.oe2203sp4.x86_64.rpm",
        "krb5-server-1.19.2-30.oe2203sp4.x86_64.rpm"
    ],
    "noarch": [
        "krb5-help-1.19.2-30.oe2203sp4.noarch.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-2257.json"
openEuler:24.03-LTS
krb5

Package

Name
krb5
Purl
pkg:rpm/openEuler/krb5&distro=openEuler-24.03-LTS

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.21.2-20.oe2403

Ecosystem specific 

{
    "src": [
        "krb5-1.21.2-20.oe2403sp1.src.rpm",
        "krb5-1.21.2-20.oe2403sp3.src.rpm",
        "krb5-1.21.2-20.oe2403.src.rpm"
    ],
    "aarch64": [
        "krb5-1.21.2-20.oe2403sp1.aarch64.rpm",
        "krb5-client-1.21.2-20.oe2403sp1.aarch64.rpm",
        "krb5-debuginfo-1.21.2-20.oe2403sp1.aarch64.rpm",
        "krb5-debugsource-1.21.2-20.oe2403sp1.aarch64.rpm",
        "krb5-devel-1.21.2-20.oe2403sp1.aarch64.rpm",
        "krb5-libs-1.21.2-20.oe2403sp1.aarch64.rpm",
        "krb5-server-1.21.2-20.oe2403sp1.aarch64.rpm",
        "krb5-1.21.2-20.oe2403sp3.aarch64.rpm",
        "krb5-client-1.21.2-20.oe2403sp3.aarch64.rpm",
        "krb5-debuginfo-1.21.2-20.oe2403sp3.aarch64.rpm",
        "krb5-debugsource-1.21.2-20.oe2403sp3.aarch64.rpm",
        "krb5-devel-1.21.2-20.oe2403sp3.aarch64.rpm",
        "krb5-libs-1.21.2-20.oe2403sp3.aarch64.rpm",
        "krb5-server-1.21.2-20.oe2403sp3.aarch64.rpm",
        "krb5-1.21.2-20.oe2403.aarch64.rpm",
        "krb5-client-1.21.2-20.oe2403.aarch64.rpm",
        "krb5-debuginfo-1.21.2-20.oe2403.aarch64.rpm",
        "krb5-debugsource-1.21.2-20.oe2403.aarch64.rpm",
        "krb5-devel-1.21.2-20.oe2403.aarch64.rpm",
        "krb5-libs-1.21.2-20.oe2403.aarch64.rpm",
        "krb5-server-1.21.2-20.oe2403.aarch64.rpm"
    ],
    "x86_64": [
        "krb5-1.21.2-20.oe2403sp1.x86_64.rpm",
        "krb5-client-1.21.2-20.oe2403sp1.x86_64.rpm",
        "krb5-debuginfo-1.21.2-20.oe2403sp1.x86_64.rpm",
        "krb5-debugsource-1.21.2-20.oe2403sp1.x86_64.rpm",
        "krb5-devel-1.21.2-20.oe2403sp1.x86_64.rpm",
        "krb5-libs-1.21.2-20.oe2403sp1.x86_64.rpm",
        "krb5-server-1.21.2-20.oe2403sp1.x86_64.rpm",
        "krb5-1.21.2-20.oe2403sp3.x86_64.rpm",
        "krb5-client-1.21.2-20.oe2403sp3.x86_64.rpm",
        "krb5-debuginfo-1.21.2-20.oe2403sp3.x86_64.rpm",
        "krb5-debugsource-1.21.2-20.oe2403sp3.x86_64.rpm",
        "krb5-devel-1.21.2-20.oe2403sp3.x86_64.rpm",
        "krb5-libs-1.21.2-20.oe2403sp3.x86_64.rpm",
        "krb5-server-1.21.2-20.oe2403sp3.x86_64.rpm",
        "krb5-1.21.2-20.oe2403.x86_64.rpm",
        "krb5-client-1.21.2-20.oe2403.x86_64.rpm",
        "krb5-debuginfo-1.21.2-20.oe2403.x86_64.rpm",
        "krb5-debugsource-1.21.2-20.oe2403.x86_64.rpm",
        "krb5-devel-1.21.2-20.oe2403.x86_64.rpm",
        "krb5-libs-1.21.2-20.oe2403.x86_64.rpm",
        "krb5-server-1.21.2-20.oe2403.x86_64.rpm"
    ],
    "noarch": [
        "krb5-help-1.21.2-20.oe2403sp1.noarch.rpm",
        "krb5-help-1.21.2-20.oe2403sp3.noarch.rpm",
        "krb5-help-1.21.2-20.oe2403.noarch.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-2257.json"
openEuler:24.03-LTS-SP1
krb5

Package

Name
krb5
Purl
pkg:rpm/openEuler/krb5&distro=openEuler-24.03-LTS-SP1

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.21.2-20.oe2403sp1

Ecosystem specific 

{
    "src": [
        "krb5-1.21.2-20.oe2403sp1.src.rpm"
    ],
    "aarch64": [
        "krb5-1.21.2-20.oe2403sp1.aarch64.rpm",
        "krb5-client-1.21.2-20.oe2403sp1.aarch64.rpm",
        "krb5-debuginfo-1.21.2-20.oe2403sp1.aarch64.rpm",
        "krb5-debugsource-1.21.2-20.oe2403sp1.aarch64.rpm",
        "krb5-devel-1.21.2-20.oe2403sp1.aarch64.rpm",
        "krb5-libs-1.21.2-20.oe2403sp1.aarch64.rpm",
        "krb5-server-1.21.2-20.oe2403sp1.aarch64.rpm"
    ],
    "x86_64": [
        "krb5-1.21.2-20.oe2403sp1.x86_64.rpm",
        "krb5-client-1.21.2-20.oe2403sp1.x86_64.rpm",
        "krb5-debuginfo-1.21.2-20.oe2403sp1.x86_64.rpm",
        "krb5-debugsource-1.21.2-20.oe2403sp1.x86_64.rpm",
        "krb5-devel-1.21.2-20.oe2403sp1.x86_64.rpm",
        "krb5-libs-1.21.2-20.oe2403sp1.x86_64.rpm",
        "krb5-server-1.21.2-20.oe2403sp1.x86_64.rpm"
    ],
    "noarch": [
        "krb5-help-1.21.2-20.oe2403sp1.noarch.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-2257.json"
openEuler:24.03-LTS-SP3
krb5

Package

Name
krb5
Purl
pkg:rpm/openEuler/krb5&distro=openEuler-24.03-LTS-SP3

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
1.21.2-20.oe2403sp3

Ecosystem specific 

{
    "src": [
        "krb5-1.21.2-20.oe2403sp3.src.rpm"
    ],
    "aarch64": [
        "krb5-1.21.2-20.oe2403sp3.aarch64.rpm",
        "krb5-client-1.21.2-20.oe2403sp3.aarch64.rpm",
        "krb5-debuginfo-1.21.2-20.oe2403sp3.aarch64.rpm",
        "krb5-debugsource-1.21.2-20.oe2403sp3.aarch64.rpm",
        "krb5-devel-1.21.2-20.oe2403sp3.aarch64.rpm",
        "krb5-libs-1.21.2-20.oe2403sp3.aarch64.rpm",
        "krb5-server-1.21.2-20.oe2403sp3.aarch64.rpm"
    ],
    "x86_64": [
        "krb5-1.21.2-20.oe2403sp3.x86_64.rpm",
        "krb5-client-1.21.2-20.oe2403sp3.x86_64.rpm",
        "krb5-debuginfo-1.21.2-20.oe2403sp3.x86_64.rpm",
        "krb5-debugsource-1.21.2-20.oe2403sp3.x86_64.rpm",
        "krb5-devel-1.21.2-20.oe2403sp3.x86_64.rpm",
        "krb5-libs-1.21.2-20.oe2403sp3.x86_64.rpm",
        "krb5-server-1.21.2-20.oe2403sp3.x86_64.rpm"
    ],
    "noarch": [
        "krb5-help-1.21.2-20.oe2403sp3.noarch.rpm"
    ]
}

Database specific

source 
"https://repo.openeuler.org/security/data/osv/OESA-2026-2257.json"