Red Hat Enterprise Linux/Hardened Images 1.5.3 Policy RPC Stubs server_stubs.c xdr_nullstring null pointer dereference

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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6.5$0-$5k0.00+

Summaryinfo

A vulnerability identified as critical has been detected in Red Hat Enterprise Linux and Hardened Images 1.5.3. This issue affects the function xdr_nullstring of the file kadmin/server/server_stubs.c of the component Policy RPC Stubs. Performing a manipulation results in null pointer dereference. This vulnerability is cataloged as CVE-2026-112318. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in Red Hat Enterprise Linux and Hardened Images 1.5.3. It has been classified as critical. This affects the function xdr_nullstring of the file kadmin/server/server_stubs.c of the component Policy RPC Stubs. The manipulation with an unknown input leads to a null pointer dereference vulnerability. CWE is classifying the issue as CWE-476. The product dereferences a pointer that it expects to be valid but is NULL. This is going to have an impact on availability. The summary by CVE is:

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.

It is possible to read the advisory at access.redhat.com. This vulnerability is uniquely identified as CVE-2026-112318 since 10/19/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 11/09/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 6.5
VulDB Temp Score: 6.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 6.5
CNA Vector (redhat): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

10/19/2026 CVE reserved
11/09/2026 +21 days Advisory disclosed
11/09/2026 +0 days VulDB entry created
11/09/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: redhat.com

Advisory: access.redhat.com
Status: Not defined

CNA: redhat
CVE: CVE-2026-112318 (🔒)

GCVE (CVE): GCVE-0-2026-112318
GCVE (VulDB): GCVE-100-433239

Entryinfo

Created: 11/09/2026 20:19
Changes: 11/09/2026 20:19 (64)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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