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Full vulnerability report · 2026
CVE-2025-24528High confidence

In MIT Kerberos 5 (aka krb5) before 1.22 (with incremental propagation), there is an integer overflow for a large update size to resize() in kdb_log.c

MIT · Kerberos 5

7.1HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:High, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • EPSS is 0.51% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict the affected network interface to trusted sources where business-safe.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs MIT Kerberos 5 and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  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: Within 30 daysRemediation target: Within 180 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.1.21.3-5Debian Security Tracker ↗Source updated 5 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 5 Oct 2026
Debian forkyforky · sourcekrb5Vendor fix publishedDebian records a fixed source-package version for this release.1.21.3-5Debian Security Tracker ↗Source updated 5 Oct 2026
Debian sidsid · sourcekrb5Vendor fix publishedDebian records a fixed source-package version for this release.1.21.3-5Debian Security Tracker ↗Source updated 5 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
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

2 current
CVE-2025-24528 · CSAF 2.0 · revision 62 · interimSUSE Product Security TeamCVE-2025-24528
369 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • krb5 as component of SLES-LTSS-TERADATA 15 SP2
  • krb5 as component of SUSE Linux Enterprise High Performance Computing 12 SP2
  • krb5-32bit as component of SUSE Linux Enterprise High Performance Computing 12 SP2
  • krb5-client as component of SUSE Linux Enterprise High Performance Computing 12 SP2
  • krb5-doc as component of SUSE Linux Enterprise High Performance Computing 12 SP2
  • krb5-plugin-kdb-ldap as component of SUSE Linux Enterprise High Performance Computing 12 SP2
  • krb5-plugin-preauth-otp as component of SUSE Linux Enterprise High Performance Computing 12 SP2
  • krb5-plugin-preauth-pkinit as component of SUSE Linux Enterprise High Performance Computing 12 SP2
  • krb5-server as component of SUSE Linux Enterprise High Performance Computing 12 SP2
  • krb5 as component of SUSE Linux Enterprise High Performance Computing 12 SP4
  • krb5-32bit as component of SUSE Linux Enterprise High Performance Computing 12 SP4
  • krb5-client as component of SUSE Linux Enterprise High Performance Computing 12 SP4
Summary
In MIT Kerberos 5 (aka krb5) before 1.22 (with incremental propagation), there is an integer overflow for a large update size to resize() in kdb_log.c. An authenticated attacker can cause an out-of-bounds write and kadmind daemon crash.
Remediation
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
CVE-2025-24528 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitykrb5: overflow when calculating ulog block size
9 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • krb5-devel as a component of Red Hat Enterprise Linux 6
  • krb5-libs as a component of Red Hat Enterprise Linux 6
  • krb5-pkinit-openssl as a component of Red Hat Enterprise Linux 6
  • krb5-server as a component of Red Hat Enterprise Linux 6
  • krb5-server-ldap as a component of Red Hat Enterprise Linux 6
  • krb5-workstation as a component of Red Hat Enterprise Linux 6
  • krb5.src as a component of Red Hat Enterprise Linux 6
  • libkadm5 as a component of Red Hat Enterprise Linux 6
  • rhcos as a component of Red Hat OpenShift Container Platform 4
Summary
A flaw was found in krb5. With incremental propagation enabled, an authenticated attacker can cause kadmind to write beyond the end of the mapped region for the iprop log file. This issue can trigger a process crash and lead to a denial of service.
Remediation
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
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-2026-2883

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

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

In MIT Kerberos 5 (aka krb5) before 1.22 (with incremental propagation), there is an integer overflow for a large update size to resize() in kdb_log.c. An authenticated attacker can cause an out-of-bounds write and kadmind daemon crash.

What

In MIT Kerberos 5 (aka krb5) before 1.22 (with incremental propagation), there is an integer overflow for a large update size to resize() in kdb_log.c. An authenticated attacker can cause an out-of-bounds write and kadmind daemon crash.

Why

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may disrupt the affected service.

What

In MIT Kerberos 5 (aka krb5) before 1.22 (with incremental propagation), there is an integer overflow for a large update size to resize() in kdb_log.c. An authenticated attacker can cause an out-of-bounds write and kadmind daemon crash.

Why

The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

How

An attacker operating through a network path may attempt exploitation with low privileges. If successful, the issue may disrupt the affected service.

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.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
a network path → Integer Overflow or Wraparound → disrupt the affected service
Attack surface
Network
Privileges required
Low: a basic authenticated account is required
User interaction
None
Attack complexity
High: exploitation depends on specific conditions
Security boundary
Changed: exploitation can affect a different security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-190 ↗

CWE-190: Integer Overflow or Wraparound. The product performs a calculation that can produce an integer overflow or wraparound when the logic assumes that the resulting value will always be larger than the original value. This occurs when an integer value is incremented to a value that is too large to store in the associated representation. When this occurs, the value may become a very small or negative number.

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

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

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACHighAttack complexity: Successful exploitation depends on specific conditions outside the attacker's direct control.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SChangedScope: The attack can affect a component governed by a different security authority.CNoneConfidentiality impact: No direct loss is represented by this metric.ILowIntegrity impact: A successful attack can cause a limited loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkDenial of serviceCWE-190
A

Official authority intelligence

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

BSI · German · WID-SEC-2025-1365IBM QRadar SIEM: Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in IBM QRadar SIEM ausnutzen, um Informationen offenzulegen, einen Denial of Service Zustand herbeizuführen, um beliebige Befehle auszuführen und um nicht näher spezifizierte Auswirkungen zu verursachen.

Official advisory ↗
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-2025-0218MIT Kerberos: Schwachstelle ermöglicht Denial of Service

Ein entfernter, authentisierter Angreifer kann eine Schwachstelle in MIT Kerberos ausnutzen, um einen Denial of Service Angriff durchzuführen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20260121Security Bulletin 21 Jan 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 21 Jan 2026, published on 21 January 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0864Multiples vulnérabilités dans VMware Tanzu

d?id=CVE-2025-21575 Référence CVE CVE-2025-21577 https://www.cve.org/CVERecord?id=CVE-2025-21577 Référence CVE CVE-2025-21579 https://www.cve.org/CVERecord?id=CVE-2025-21579 Référence CVE CVE-2025-21580 https://www.cve.org/CVERecord?id=CVE-2025-21580 Référence CVE CVE-2025-21581 https://www.cve.org/CVERecord?id=CVE-2025-21581 Référence CVE CVE-2025-21584 https://www.cve.org/CVERecord?id=CVE-2025-21584 Référence CVE CVE-2025-21585 https://www.cve.org/CVERecord?id=CVE-2025-21585 Référence CVE CVE-2025-22866 https://www.cve.org/CVERecord?id=CVE-2025-22866 Référence CVE CVE-2025-22871 https://www.cve.org/CVERecord?id=CVE-2025-22871 Référence CVE CVE-2025-24528 https://www.cve.org/CVERecord?id=CVE-2025-24528 Référence CVE CVE-2025-27587 https://www.cve.org/CVERecord?id=CVE-2025-27587 Référence CVE CVE-2025-29088 https://www.cve.org/CVERecord?id=CVE-2025-29088 Référence CVE CVE-2025-30681 https://www.cve.org/CVERecord?id=CVE-2025-30681 Référence CVE CVE-2025-30682 https://www.cve.org/CVERecord?id=CVE-2025-30682 Référence CVE CVE-2025-30683 https://www.cve.org/CVERecord?id=CVE-2025-30683 Référence CVE CVE-2025-30684 https://www.cve.org/CVERecord?id=CVE-2025-30684 Référence CVE CVE-2025-30685 https://www.cve.org/CVERecord?id=CVE-2025-30685 Référence CVE CVE-2025-30687 https://www.cve.org/CVERecord?id=

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0760Multiples vulnérabilités dans les produits IBM

cord?id=CVE-2025-0755 Référence CVE CVE-2025-1647 https://www.cve.org/CVERecord?id=CVE-2025-1647 Référence CVE CVE-2025-21756 https://www.cve.org/CVERecord?id=CVE-2025-21756 Référence CVE CVE-2025-21759 https://www.cve.org/CVERecord?id=CVE-2025-21759 Référence CVE CVE-2025-21887 https://www.cve.org/CVERecord?id=CVE-2025-21887 Référence CVE CVE-2025-21966 https://www.cve.org/CVERecord?id=CVE-2025-21966 Référence CVE CVE-2025-22004 https://www.cve.org/CVERecord?id=CVE-2025-22004 Référence CVE CVE-2025-22868 https://www.cve.org/CVERecord?id=CVE-2025-22868 Référence CVE CVE-2025-22870 https://www.cve.org/CVERecord?id=CVE-2025-22870 Référence CVE CVE-2025-24528 https://www.cve.org/CVERecord?id=CVE-2025-24528 Référence CVE CVE-2025-24855 https://www.cve.org/CVERecord?id=CVE-2025-24855 Référence CVE CVE-2025-24970 https://www.cve.org/CVERecord?id=CVE-2025-24970 Référence CVE CVE-2025-2533 https://www.cve.org/CVERecord?id=CVE-2025-2533 Référence CVE CVE-2025-25724 https://www.cve.org/CVERecord?id=CVE-2025-25724 Référence CVE CVE-2025-26791 https://www.cve.org/CVERecord?id=CVE-2025-26791 Référence CVE CVE-2025-27152 https://www.cve.org/CVERecord?id=CVE-2025-27152 Référence CVE CVE-2025-27516 https://www.cve.org/CVERecord?id=CVE-2025-27516 Référence CVE CVE-2025-27789 https://www.cve.org/CVERecord?id=CV

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0693Multiples vulnérabilités dans VMware Tanzu

rg/CVERecord?id=CVE-2025-1153 Référence CVE CVE-2025-1215 https://www.cve.org/CVERecord?id=CVE-2025-1215 Référence CVE CVE-2025-1371 https://www.cve.org/CVERecord?id=CVE-2025-1371 Référence CVE CVE-2025-1376 https://www.cve.org/CVERecord?id=CVE-2025-1376 Référence CVE CVE-2025-1377 https://www.cve.org/CVERecord?id=CVE-2025-1377 Référence CVE CVE-2025-1795 https://www.cve.org/CVERecord?id=CVE-2025-1795 Référence CVE CVE-2025-22134 https://www.cve.org/CVERecord?id=CVE-2025-22134 Référence CVE CVE-2025-22874 https://www.cve.org/CVERecord?id=CVE-2025-22874 Référence CVE CVE-2025-24014 https://www.cve.org/CVERecord?id=CVE-2025-24014 Référence CVE CVE-2025-24528 https://www.cve.org/CVERecord?id=CVE-2025-24528 Référence CVE CVE-2025-24928 https://www.cve.org/CVERecord?id=CVE-2025-24928 Référence CVE CVE-2025-25724 https://www.cve.org/CVERecord?id=CVE-2025-25724 Référence CVE CVE-2025-26603 https://www.cve.org/CVERecord?id=CVE-2025-26603 Référence CVE CVE-2025-29768 https://www.cve.org/CVERecord?id=CVE-2025-29768 Référence CVE CVE-2025-3198 https://www.cve.org/CVERecord?id=CVE-2025-3198 Référence CVE CVE-2025-3576 https://www.cve.org/CVERecord?id=CVE-2025-3576 Référence CVE CVE-2025-4138 https://www.cve.org/CVERecord?id=CVE-2025-4138 Référence CVE CVE-2025-4330 https://www.cve.org/CVERecord?id=CVE-202

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0530Multiples vulnérabilités dans les produits IBM

ERecord?id=CVE-2024-40906 Référence CVE CVE-2024-43842 https://www.cve.org/CVERecord?id=CVE-2024-43842 Référence CVE CVE-2024-53141 https://www.cve.org/CVERecord?id=CVE-2024-53141 Référence CVE CVE-2024-53150 https://www.cve.org/CVERecord?id=CVE-2024-53150 Référence CVE CVE-2024-53241 https://www.cve.org/CVERecord?id=CVE-2024-53241 Référence CVE CVE-2024-7254 https://www.cve.org/CVERecord?id=CVE-2024-7254 Référence CVE CVE-2024-8176 https://www.cve.org/CVERecord?id=CVE-2024-8176 Référence CVE CVE-2025-0395 https://www.cve.org/CVERecord?id=CVE-2025-0395 Référence CVE CVE-2025-22869 https://www.cve.org/CVERecord?id=CVE-2025-22869 Référence CVE CVE-2025-24528 https://www.cve.org/CVERecord?id=CVE-2025-24528 Référence CVE CVE-2025-31650 https://www.cve.org/CVERecord?id=CVE-2025-31650 Référence CVE CVE-2025-31651 https://www.cve.org/CVERecord?id=CVE-2025-31651 Référence CVE CVE-2025-33117 https://www.cve.org/CVERecord?id=CVE-2025-33117 Référence CVE CVE-2025-33121 https://www.cve.org/CVERecord?id=CVE-2025-33121 Référence CVE CVE-2025-36050 https://www.cve.org/CVERecord?id=CVE-2025-36050 Référence CVE CVE-2025-46701 https://www.cve.org/CVERecord?id=CVE-2025-46701 Gestion détaillée du document le 20 juin 2025 Version initiale Alertes Avis Bulletins d’actualités Mentions légales Conditions générales À

Official advisory ↗
CERT-FR · French · CERTFR-2025-AVI-0524Multiples vulnérabilités dans VMware Tanzu

d?id=CVE-2025-21559 Référence CVE CVE-2025-22233 https://www.cve.org/CVERecord?id=CVE-2025-22233 Référence CVE CVE-2025-22235 https://www.cve.org/CVERecord?id=CVE-2025-22235 Référence CVE CVE-2025-22866 https://www.cve.org/CVERecord?id=CVE-2025-22866 Référence CVE CVE-2025-22869 https://www.cve.org/CVERecord?id=CVE-2025-22869 Référence CVE CVE-2025-22870 https://www.cve.org/CVERecord?id=CVE-2025-22870 Référence CVE CVE-2025-22871 https://www.cve.org/CVERecord?id=CVE-2025-22871 Référence CVE CVE-2025-22872 https://www.cve.org/CVERecord?id=CVE-2025-22872 Référence CVE CVE-2025-23022 https://www.cve.org/CVERecord?id=CVE-2025-23022 Référence CVE CVE-2025-24528 https://www.cve.org/CVERecord?id=CVE-2025-24528 Référence CVE CVE-2025-24928 https://www.cve.org/CVERecord?id=CVE-2025-24928 Référence CVE CVE-2025-27363 https://www.cve.org/CVERecord?id=CVE-2025-27363 Référence CVE CVE-2025-30204 https://www.cve.org/CVERecord?id=CVE-2025-30204 Référence CVE CVE-2025-31115 https://www.cve.org/CVERecord?id=CVE-2025-31115 Référence CVE CVE-2025-31650 https://www.cve.org/CVERecord?id=CVE-2025-31650 Référence CVE CVE-2025-31651 https://www.cve.org/CVERecord?id=CVE-2025-31651 Référence CVE CVE-2025-46701 https://www.cve.org/CVERecord?id=CVE-2025-46701 Référence CVE CVE-2025-4802 https://www.cve.org/CVERecord?id=C

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.
Patch available
Affected
Fixed
For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
Action
To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 16 Jan 2026 · Last source change 16 Jan 2026, 18:06 UTC · CWE-190 · Integer Overflow or Wraparound

CVE recordCVE.org · 5.2
CVSS sourceCNA
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-2026-2883
Product sourceVendor CSAF · SUSE Product Security Team
Remediation sourceVendor CSAF · SUSE Product Security Team
CWE sourceCNA
NVD statusNVD not scheduled

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗
  1. Affected versionsThe structured affected or fixed version information changed.
    Before
    1.7 < 1.22 · Fixed: No fixed version is explicitly recorded in the structured CVE data.
    After
    1.7 < 1.22 · Fixed: For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258
    Red Hat Product Security ↗
  2. Remediation statusRemediation status changed from Awaiting fix to Patch available.
    Before
    Awaiting fix
    After
    Patch available
    Red Hat Product Security ↗
Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release recorded from official guidance
ENISA EUVD · EUVD-2026-2883↗Vendor CSAF · SUSE Product Security Team↗Red Hat Product Security security advisory↗CVE authority or vendor 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-2025-24528 · cve.blacktree.nl