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Full vulnerability report · 2024
CVE-2024-26462High confidence

Kerberos 5 (aka krb5) 1.21.2 contains a memory leak vulnerability in /krb5/src/kdc/ndr.c

Unknown · Unknown

5.5MediumCVSS 3.1
Recommended action
Within 7 days

Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityMediumOperational priority:Medium, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • A structured source references public exploit or proof-of-concept material.
  • Exploitation requires an existing local or physical foothold with privileges.
  • EPSS is 0.44% for the current model date.

Compensating controls

  • Restrict local access and enforce least privilege on affected hosts.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs Unknown Unknown and falls inside the recorded affected range.
  2. Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: As exposure requiresRemediation target: Within 365 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Distribution package intelligence

Release-specific package status

Debian, ubuntu findings are scoped to the named distribution, release and source package. An absent finding does not mean a package is unaffected.

5 package states
Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Distribution releaseSource packageVendor stateFixed versionEvidence
Debian trixietrixie · sourcekrb5Vendor fix publishedDebian records a fixed source-package version for this release.1.21.3-1Debian Security Tracker ↗Source updated 6 Oct 2026
Debian bookwormbookworm · sourcekrb5Vendor fix publishedDebian records a fixed source-package version for this release.1.20.1-2+deb12u3Debian Security Tracker ↗Source updated 6 Oct 2026
Debian forkyforky · sourcekrb5Vendor fix publishedDebian records a fixed source-package version for this release.1.21.3-1Debian Security Tracker ↗Source updated 6 Oct 2026
Debian sidsid · sourcekrb5Vendor fix publishedDebian records a fixed source-package version for this release.1.21.3-1Debian Security Tracker ↗Source updated 6 Oct 2026
Ubuntu 24.04 LTSnoble · standard archivekrb5Vendor fix publishedCanonical reports that a fixed source package version has been published. Repository candidate availability is not checked by BlackTree.1.20.1-6ubuntu2.5Canonical Ubuntu Security ↗Source updated 5 Oct 2026
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2024-23731

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

Medium technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
01

What, why and how

Kerberos 5 (aka krb5) 1.21.2 contains a memory leak vulnerability in /krb5/src/kdc/ndr.c.

What

Kerberos 5 (aka krb5) 1.21.2 contains a memory leak vulnerability in /krb5/src/kdc/ndr.c.

Why

The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

Kerberos 5 (aka krb5) 1.21.2 contains a memory leak vulnerability in /krb5/src/kdc/ndr.c.

Why

The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
Reference recorded

A structured CVE source labels at least one public reference as exploit material. BlackTree has not independently validated that it is safe, reliable or weaponised.

Likely attack path
local access → Missing Release of Memory after Effective Lifetime → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface
Local
Privileges required
Low: a basic authenticated account is required
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-401 ↗

CWE-401: Missing Release of Memory after Effective Lifetime. The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
CWE-401Public exploit reference
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-2026-1730Xerox FreeFlow Print Server: Mehrere Schwachstellen ermöglichen nicht spezifizierten Angriff

Ein Angreifer kann mehrere Schwachstellen in Xerox FreeFlow Print Server ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen.

Official advisory ↗
BSI · German · WID-SEC-2024-0485MIT Kerberos: Mehrere Schwachstellen ermöglichen Denial of Service

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in MIT Kerberos ausnutzen, um einen Denial of Service Angriff durchzuführen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20240306Security Bulletin 06 Mar 2024

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 06 Mar 2024, published on 6 March 2024. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-1057Multiples vulnérabilités dans les produits VMware

ord?id=CVE-2024-24855 Référence CVE CVE-2024-24857 https://www.cve.org/CVERecord?id=CVE-2024-24857 Référence CVE CVE-2024-24858 https://www.cve.org/CVERecord?id=CVE-2024-24858 Référence CVE CVE-2024-24859 https://www.cve.org/CVERecord?id=CVE-2024-24859 Référence CVE CVE-2024-25062 https://www.cve.org/CVERecord?id=CVE-2024-25062 Référence CVE CVE-2024-2511 https://www.cve.org/CVERecord?id=CVE-2024-2511 Référence CVE CVE-2024-25260 https://www.cve.org/CVERecord?id=CVE-2024-25260 Référence CVE CVE-2024-26458 https://www.cve.org/CVERecord?id=CVE-2024-26458 Référence CVE CVE-2024-26461 https://www.cve.org/CVERecord?id=CVE-2024-26461 Référence CVE CVE-2024-26462 https://www.cve.org/CVERecord?id=CVE-2024-26462 Référence CVE CVE-2024-26598 https://www.cve.org/CVERecord?id=CVE-2024-26598 Référence CVE CVE-2024-26603 https://www.cve.org/CVERecord?id=CVE-2024-26603 Référence CVE CVE-2024-26605 https://www.cve.org/CVERecord?id=CVE-2024-26605 Référence CVE CVE-2024-26611 https://www.cve.org/CVERecord?id=CVE-2024-26611 Référence CVE CVE-2024-26618 https://www.cve.org/CVERecord?id=CVE-2024-26618 Référence CVE CVE-2024-26621 https://www.cve.org/CVERecord?id=CVE-2024-26621 Référence CVE CVE-2024-26631 https://www.cve.org/CVERecord?id=CVE-2024-26631 Référence CVE CVE-2024-26637 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0969Multiples vulnérabilités dans les produits VMware

ord?id=CVE-2024-25062 Référence CVE CVE-2024-2511 https://www.cve.org/CVERecord?id=CVE-2024-2511 Référence CVE CVE-2024-25126 https://www.cve.org/CVERecord?id=CVE-2024-25126 Référence CVE CVE-2024-25260 https://www.cve.org/CVERecord?id=CVE-2024-25260 Référence CVE CVE-2024-26141 https://www.cve.org/CVERecord?id=CVE-2024-26141 Référence CVE CVE-2024-26146 https://www.cve.org/CVERecord?id=CVE-2024-26146 Référence CVE CVE-2024-26256 https://www.cve.org/CVERecord?id=CVE-2024-26256 Référence CVE CVE-2024-26458 https://www.cve.org/CVERecord?id=CVE-2024-26458 Référence CVE CVE-2024-26461 https://www.cve.org/CVERecord?id=CVE-2024-26461 Référence CVE CVE-2024-26462 https://www.cve.org/CVERecord?id=CVE-2024-26462 Référence CVE CVE-2024-26700 https://www.cve.org/CVERecord?id=CVE-2024-26700 Référence CVE CVE-2024-26726 https://www.cve.org/CVERecord?id=CVE-2024-26726 Référence CVE CVE-2024-26775 https://www.cve.org/CVERecord?id=CVE-2024-26775 Référence CVE CVE-2024-26896 https://www.cve.org/CVERecord?id=CVE-2024-26896 Référence CVE CVE-2024-27280 https://www.cve.org/CVERecord?id=CVE-2024-27280 Référence CVE CVE-2024-27281 https://www.cve.org/CVERecord?id=CVE-2024-27281 Référence CVE CVE-2024-27407 https://www.cve.org/CVERecord?id=CVE-2024-27407 Référence CVE CVE-2024-27766 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0756Multiples vulnérabilités dans les produits VMware

ERecord?id=CVE-2024-22365 Référence CVE CVE-2024-23337 https://www.cve.org/CVERecord?id=CVE-2024-23337 Référence CVE CVE-2024-2397 https://www.cve.org/CVERecord?id=CVE-2024-2397 Référence CVE CVE-2024-2398 https://www.cve.org/CVERecord?id=CVE-2024-2398 Référence CVE CVE-2024-25062 https://www.cve.org/CVERecord?id=CVE-2024-25062 Référence CVE CVE-2024-2511 https://www.cve.org/CVERecord?id=CVE-2024-2511 Référence CVE CVE-2024-25260 https://www.cve.org/CVERecord?id=CVE-2024-25260 Référence CVE CVE-2024-26458 https://www.cve.org/CVERecord?id=CVE-2024-26458 Référence CVE CVE-2024-26461 https://www.cve.org/CVERecord?id=CVE-2024-26461 Référence CVE CVE-2024-26462 https://www.cve.org/CVERecord?id=CVE-2024-26462 Référence CVE CVE-2024-26686 https://www.cve.org/CVERecord?id=CVE-2024-26686 Référence CVE CVE-2024-26739 https://www.cve.org/CVERecord?id=CVE-2024-26739 Référence CVE CVE-2024-27402 https://www.cve.org/CVERecord?id=CVE-2024-27402 Référence CVE CVE-2024-28085 https://www.cve.org/CVERecord?id=CVE-2024-28085 Référence CVE CVE-2024-28180 https://www.cve.org/CVERecord?id=CVE-2024-28180 Référence CVE CVE-2024-28182 https://www.cve.org/CVERecord?id=CVE-2024-28182 Référence CVE CVE-2024-28834 https://www.cve.org/CVERecord?id=CVE-2024-28834 Référence CVE CVE-2024-28835 https://www.cve.org/CVERecord?id=

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2024-019031MIT の kerberos 5 等複数ベンダの製品における有効期限後のメモリの解放の欠如に関する脆弱性

MIT の kerberos 5 等複数ベンダの製品には、有効期限後のメモリの解放の欠如に関する脆弱性が存在します。

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Fix not verified
Affected
n/a
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 26 Feb 2024 · Last source change 25 Mar 2025, 20:05 UTC · CWE-401 · Missing Release of Memory after Effective Lifetime

CVE recordCVE.org · 5.1
CVSS sourceNIST NVD
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2024-23731
Product sourceUnavailable
Remediation sourceCVE/CNA references
CWE sourceCISA ADP
NVD statusNVD modified after enrichment

Missing structured fields: affected product. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2024-23731↗CISA Vulnrichment SSVC evidence↗Public exploit reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2024-26462 · cve.blacktree.nl