The policy RPC stubs in kadmin/server/server_stubs.c in MIT Kerberos 5 (aka krb5) 1.5.3 and later do not reject a NULL policy name decoded by xdr_nullstring(), which allows remote authenticated users to cause a denial of service (kadmind crash via NULL pointer dereference) by sending a policy request with an empty policy name that reaches authorization checks or logging code.
CVE-2026-112318
“—” beside the score: it is equal to the CVSS score beside it.
Score 6.5 from GitHub Security Advisory (severity: MODERATE) published 2026-11-09. A secondary CVSS source baseline 6.5; sources differ by 0.0.
Also known asEUVD-2026-120234 (ENISA EUVD) · GHSA-rjfm-w5r7-r3rw (GitHub Security Advisories)Source: ENISA EUVD
- CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
A fix is available — apply it.
- CVSS v3
- 6.5
- EG Score
- 6.5MEDIUMhigh confidence
- EG Risk
- 45EG Risk 45/100
EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.
How it’s computed (value × EchelonGraph’s weight)Severity65% × 45%Impact severity (EG Severity): CVSS 6.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.Exploitation40% × 40%EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.Automatability0% × 15%CISA's SSVC Automatable value: no (Vulnrichment).SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.Action: A fix is available. Apply it within your standard update timelines. - EPSS PROB
- 0.8%
- EPSS %ILE
- 55th
- KEV
- Not listed
What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)
The EG score (6.5): severity, escalated by confirmed exploitation. This CVE's 6.5 is its impact severity (EG Severity), not escalated.
- EG Severity
- 6.5 MEDIUMCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
- EG Likelihood
- 0.8% within 30 daysSource: FIRST EPSS. FIRST's exploitation probability, not an EchelonGraph model.
- Confirmed exploitation
- None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
- EG Priority
- SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.
SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).
A fix is available. Apply it within your standard update timelines.
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table
BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.
The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it
Published
November 9, 2026
Last Modified
November 13, 2026
Advisory Details (2)
Auto-updated Nov 9, 20262478792 – (CVE-2026-112318) CVE-2026-112318 krb5: MIT krb5 kadmind authenticated DoS exploiting dereference of null policy name pointers
https://bugzilla.redhat.com/show_bug.cgi?id=2478792CVE-2026-112318 - Red Hat Customer Portal
Affected: Red Hat Enterprise Linux 8 or OpenShift Container Platform 4, is affected by this vulnerability and a fix may be released to a
https://access.redhat.com/security/cve/CVE-2026-112318Vendor Advisories for CVE-2026-112318(3)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
- RHSA-2026:99625Red Hat Product SecurityHigh
Red Hat Security Advisory: krb5 security, bug fix, and enhancement update
- RHSA-2026:99624Red Hat Product SecurityHigh
Red Hat Security Advisory: krb5 security, bug fix, and enhancement update
- GHSA-rjfm-w5r7-r3rwGitHub Security AdvisoriesMedium
The policy RPC stubs in kadmin/server/server_stubs.c in MIT Kerberos 5 (aka krb5) 1.5.3 and later...
Patch Availability(4)
| Vendor / Ecosystem | Fix (by version range) / Patch | Released | Source |
|---|---|---|---|
| redhat | krb5-0:1.21.3-11.el10_3.2 | 2026-11-12 | redhat |
| redhat | krb5-0:1.21.3-10.el10_2.2 | 2026-11-12 | redhat |
| redhat | krb5-0:1.21.1-10.el9_9.2 | 2026-11-12 | redhat |
| redhat | krb5-0:1.21.1-10.el9_8.3 | 2026-11-12 | redhat |
Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.
Affected Packages
(5 across 5 ecosystems)
Alpine:v3.23(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| krb5 | — |
| — |
Alpine:v3.24(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| krb5 | — |
| — |
Debian:12(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| krb5 | 1.20.1-2 ... 1.22.1-3 (23 versions) |
| — |
Debian:13(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| krb5 | 1.21.3-5 ... 1.22.1-3 (6 versions) |
| — |
Debian:14(1)
| Package | Vulnerable range | Fix by version range | Dependents |
|---|---|---|---|
| krb5 | 1.21.3-5, 1.22.1-1, 1.22.1-2, 1.22.1-2.1, 1.22.1-3 |
| — |
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Additional Vendor Advisories
(2)
Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.
Data Freshness Timeline
(refreshed 22× in last 7d / 22× in last 30d)
Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.
- 2026-11-13 16:50 UTCEPSS rescoreEPSS 0.8% · 55th percentile
- 2026-11-13 14:43 UTCEchelonGraph re-scored
- 2026-11-13 14:43 UTCVendor advisory
- 2026-11-13 14:43 UTCGHSA enrichmentGHSA-rjfm-w5r7-r3rw · GitHub severity MODERATE · GitHub CVSS 6.5
- 2026-11-13 14:19 UTCEchelonGraph re-scored
- 2026-11-13 14:19 UTCVendor advisory
- 2026-11-13 14:19 UTCGHSA enrichmentGHSA-rjfm-w5r7-r3rw · GitHub severity MODERATE · GitHub CVSS 6.5
- 2026-11-13 13:29 UTCEchelonGraph re-scored
- 2026-11-13 13:29 UTCVendor advisory
- 2026-11-13 13:29 UTCGHSA enrichmentGHSA-rjfm-w5r7-r3rw · GitHub severity MODERATE · GitHub CVSS 6.5
- 2026-11-13 12:42 UTCEchelonGraph re-scored
- 2026-11-13 12:42 UTCVendor advisory
- 2026-11-13 12:42 UTCGHSA enrichmentGHSA-rjfm-w5r7-r3rw · GitHub severity MODERATE · GitHub CVSS 6.5
- 2026-11-13 00:28 UTCEchelonGraph re-scored
- 2026-11-13 00:28 UTCVendor advisory
- 2026-11-13 00:28 UTCGHSA enrichmentGHSA-rjfm-w5r7-r3rw · GitHub severity MODERATE · GitHub CVSS 6.5
- 2026-11-12 23:02 UTCEchelonGraph re-scored
- 2026-11-12 23:02 UTCGHSA enrichmentGHSA-rjfm-w5r7-r3rw · GitHub severity MODERATE · GitHub CVSS 6.5
- 2026-11-12 17:30 UTCEchelonGraph re-scored
- 2026-11-12 17:30 UTCGHSA enrichmentGHSA-rjfm-w5r7-r3rw · GitHub severity MODERATE · GitHub CVSS 6.5
- 2026-11-12 16:52 UTCEchelonGraph re-scored
- 2026-11-12 16:52 UTCGHSA enrichmentGHSA-rjfm-w5r7-r3rw · GitHub severity MODERATE · GitHub CVSS 6.5
- 2026-11-12 16:33 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-11-12 13:28 UTCEchelonGraph re-scored
- 2026-11-12 13:28 UTCGHSA enrichmentGHSA-rjfm-w5r7-r3rw · GitHub severity MODERATE · GitHub CVSS 6.5
Show 9 moreShow fewer
- 2026-11-12 13:02 UTCEchelonGraph re-scored
- 2026-11-12 13:02 UTCGHSA enrichmentGHSA-rjfm-w5r7-r3rw · GitHub severity MODERATE · GitHub CVSS 6.5
- 2026-11-11 16:38 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-11-10 16:42 UTCEPSS rescoreEPSS 0.6% · 47th percentile
- 2026-11-09 21:46 UTCEchelonGraph re-scored
- 2026-11-09 21:46 UTCGHSA enrichmentGHSA-rjfm-w5r7-r3rw · GitHub severity MODERATE · GitHub CVSS 6.5
- 2026-11-09 20:00 UTCENISA EUVD ID recordedEUVD-2026-120234 · Source: ENISA EUVD
- 2026-11-09 19:17 UTCEchelonGraph re-scoredFirst assessed: 6.5 MEDIUM
- 2026-11-09 19:14 UTCMITRE cvelistV5first tracked
Related CVEs(same product + same vendor + same CWE)
Same product
10 shownAlpine:v3.23:krb5
Same vendor
9 shownredhat:RHSA-2026:99624
Frequently asked(5)
What is CVE-2026-112318?
When was CVE-2026-112318 made public?
Is CVE-2026-112318 actively exploited?
What is the CVSS score of CVE-2026-112318?
How do I remediate CVE-2026-112318?
Dependency Blast Radius
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