CVE-2009-0846

CRITICAL

The asn1_decode_generaltime function in lib/krb5/asn.1/asn1_decode.c in the ASN.1 GeneralizedTime decoder in MIT Kerberos 5 (aka krb5) before 1.6.4 allows remote attackers to cause a denial of serv...

Affects 9 products across 5 vendors.

BCS7.96
CVSS 2.010.0
EPSS8.9%
Percentile95th
PatchPatched
CVSS Vector — Plain English Remotely exploitable over the network, low complexity.
CWE Weakness Definitions
CWE-824: CWE-824
◆ SAGE Intelligence — CITED Relevance Research Team

This vulnerability was disclosed in 2009. A critical vulnerability affects Apple systems (CVE-2009-0846). No public exploit code is currently available. Isolate affected systems if patching is not feasible.

BSID: BS-2009-GLOBAL-313490-C • Model: rule-based-v1 • Confidence: MEDIUM

Is this CVE in your environment?

BreachSpider monitors your ICS/OT environment for vulnerabilities like this one. No agents or network access required. Free to start.

Check My Environment →
Frequently Asked Questions
What is CVE-2009-0846?
This vulnerability was disclosed in 2009. A critical vulnerability affects Apple systems (CVE-2009-0846). No public exploit code is currently available. Isolate affected systems if patching is not feasible.
What is the CVSS score for CVE-2009-0846?
CVE-2009-0846 has CVSS 10.0 (Critical). Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C. EPSS: 8.9%.
Is CVE-2009-0846 actively exploited?
No confirmed active exploitation of CVE-2009-0846 as of 2026-05-30.
How do I remediate CVE-2009-0846?
Priority: MEDIUM. Advisory: http://web.mit.edu/kerberos/advisories/MITKRB5-SA-2009-002.txt PSIRT: [email protected]
What systems are affected by CVE-2009-0846?
CVE-2009-0846 affects: Apple, Canonical, Fedoraproject, Mit, Redhat, Redhat, Redhat, Redhat.
Vulnerability Details
CVE IDCVE-2009-0846
BSIDBS-2009-GLOBAL-313490-C BreachSpider Global ID
CVSS VectorAV:N/AC:L/Au:N/C:C/I:C/A:C
Published2009-04-09
Last Modified2026-04-23
ICS Relevance0%
Weakness (CWE)
CWE-824
SourceNVD
Official Description

The asn1_decode_generaltime function in lib/krb5/asn.1/asn1_decode.c in the ASN.1 GeneralizedTime decoder in MIT Kerberos 5 (aka krb5) before 1.6.4 allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code via vectors involving an invalid DER encoding that triggers a free of an uninitialized pointer.

Source: NIST NVD / MITRE CVE Database

Attack Vector Analysis — CITED Relevance

Vulnerability details: The asn1_decode_generaltime function in lib/krb5/asn.1/asn1_decode.c in the ASN.1 GeneralizedTime decoder in MIT Kerberos 5 (aka krb5) before 1.6.4 allows remote attackers to cause a denial of service (daemon crash) or possibly execute arbitrary code via vectors involving an invalid DER encoding that triggers a free of an uninitialized pointer. CVSS vector: AV:N/AC:L/Au:N/C:C/I:C/A:C.

Exploitation Likelihood: MEDIUM

Affected Products
VendorProductFixed Version
Apple Mac Os X —
Canonical Ubuntu Linux —
Fedoraproject Fedora —
Mit Kerberos 5 —
Redhat Enterprise Linux —
Redhat Enterprise Linux Eus —
Redhat Enterprise Linux Desktop —
Redhat Enterprise Linux Server —
Redhat Enterprise Linux Workstation —
Remediation
View Vendor Advisory →

Remediation Priority: MEDIUM

Vendor PSIRT: [email protected]
Threat Intelligence
● Threat Intelligence Validated: August 2026 | Threat Age: 6328 Days
CISA KEVNot in KEV catalog
Public ExploitNot confirmed
PoC CodeNot confirmed
SAGE Enrichment Record — provenance & audit hash
Modelrule-based-v1
ConfidenceMEDIUM
Enriched At2026-05-24
SHA-512 Audit Hashbab6cae3c0342ea354dab699a6e8e4c5ddd8e9cd44faf71aad50c6e5ff829fd9bf4e36e1ff14e22bb2d4626a8abf4d386b8a18a35674c8ca2ef4911a8165ec90
Related CVEs affecting Apple
CVE-2010-1386 10.0 page/Geolocation.cpp in WebCore in WebKit before r56188 and before 1.2.5 does... CVE-2013-3357 10.0 Integer overflow in Adobe Reader and Acrobat before 10.1.8 and 11.x before 11... CVE-2009-3956 10.0 The default configuration of Adobe Reader and Acrobat 9.x before 9.3, and 8.x... CVE-2013-3332 10.0 Adobe Flash Player before 10.3.183.86 and 11.x before 11.7.700.202 on Windows... CVE-2007-4689 10.0 Double free vulnerability in the Networking component in Apple Mac OS X 10.4 ...
View all Apple CVEs →

Critical Severity - Know Your Exposure

A CVSS 10.0 vulnerability in your ICS environment cannot wait. BreachSpider maps critical CVEs to your specific assets and tells you what to fix first.

Check Your Assets Free →