CVE-2026-107708

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Source

https://cve.org/CVERecord?id=CVE-2026-107708

Import Source

https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107708.json

JSON Data

https://api.osv.dev/v1/vulns/CVE-2026-107708

Downstream

Published

2026-10-08T20:15:53Z

Modified

2026-10-10T02:47:26Z

Severity

6.9 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N CVSS Calculator

Summary

MIT krb5 through 1.22.2 KDC NULL Pointer Dereference via S4U2Proxy PAC

Details

MIT krb5 through 1.22.2 contains a NULL pointer dereference vulnerability in the KDC's get_pac_princ_with_realm() that returns success while leaving the client principal NULL on malformed names. A malicious or compromised cross-realm trusted KDC can send an S4U2Proxy request with a PAC carrying a malformed client name to crash krb5kdc and deny authentication.

Database specific

{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-476"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/107xxx/CVE-2026-107708.json"
}

References

Affected packages

Git / github.com/krb5/krb5

Affected ranges

Type

GIT

Repo

https://github.com/krb5/krb5

Events

Introduced

Fixed

8570e77819563e036027e1da789d08ec9333ed4d

Fixed

a88a18cafa1040a0c4f9c8d08288fc98831ec86d

Fixed

f6e2c397ceda6467ebbaab8ed66d4895c9f1d6a7

Database specific

Show details

{
    "extracted_events": [
        {
            "introduced": "krb5"
        },
        {
            "fixed": "1.22.2"
        }
    ],
    "source": [
        "DESCRIPTION",
        "REFERENCES"
    ]
}

Affected versions

krb5-1.*

krb5-1.22-beta1

krb5-1.22-final

krb5-1.22.1-final

Database specific

source

"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-107708.json"