Linux Kernel up to 6.6.152/6.12.104/6.18.45/7.1.9 selinux security_get_classes 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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9.5$0-$5k0.82

Summaryinfo

A vulnerability described as very critical has been identified in Linux Kernel up to 6.6.152/6.12.104/6.18.45/7.1.9. Affected by this vulnerability is the function security_get_classes of the component selinux. Executing a manipulation can lead to null pointer dereference. The identification of this vulnerability is CVE-2026-80912. The attack may be launched remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as very critical was found in Linux Kernel up to 6.6.152/6.12.104/6.18.45/7.1.9. This vulnerability affects the function security_get_classes of the component selinux. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: selinux: reject an unclaimed class value in security_get_classes() security_get_classes() sizes an array by p_classes.nprim and fills it at value - 1, so a class value the policy never defines leaves a NULL. sel_make_classes() passes every entry to sel_make_dir(), reaching the same d_alloc_name() dereference as the permission array. The class symbol table is allowed to be sparse (policydb_class_isvalid() exists to absorb that), but this getter builds its own array straight from the hash table and has no such predicate. Fail the lookup when a value went unclaimed instead of handing out the NULL. Conforming policies define every class they declare and are unaffected.

The advisory is shared for download at git.kernel.org. This vulnerability was named CVE-2026-80912 since 08/26/2026. The exploitation appears to be easy. The attack can be initiated remotely. There are known technical details, but no exploit is available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 09/04/2026).

Upgrading to version 6.6.153, 6.12.105, 6.18.46 or 7.1.10 eliminates this vulnerability. Applying the patch e0285bb152211c00900136b66d4b420c14a59094/099869e9343a5f8c22b58497f074b34f63cbf856/841aea4d5a25e16273d04cd07a74142b4687e03b/d8a10899ea3c84b80de72ca8ee9039e9a5156c9a/22b05fec62c0fe9864cfceb52f7d0f3a34d9b1dd is able to eliminate this problem.

Once again VulDB remains the best source for vulnerability data.

Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 9.9
VulDB Meta Temp Score: 9.5

VulDB Base Score: 9.9
VulDB Temp Score: 9.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
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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: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 6.6.153/6.12.105/6.18.46/7.1.10
Patch: e0285bb152211c00900136b66d4b420c14a59094/099869e9343a5f8c22b58497f074b34f63cbf856/841aea4d5a25e16273d04cd07a74142b4687e03b/d8a10899ea3c84b80de72ca8ee9039e9a5156c9a/22b05fec62c0fe9864cfceb52f7d0f3a34d9b1dd

Timelineinfo

08/26/2026 CVE reserved
09/04/2026 +9 days Advisory disclosed
09/04/2026 +0 days VulDB entry created
09/04/2026 +0 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-80912 (🔒)
GCVE (CVE): GCVE-0-2026-80912
GCVE (VulDB): GCVE-100-399124

Entryinfo

Created: 09/04/2026 19:51
Changes: 09/04/2026 19:51 (59)
Complete: 🔍
Cache ID: 216::103

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