Linux Kernel up to 6.19.11 array_index_nospec null pointer dereference

CVSS Meta Temp Score
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CTI Interest Score
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5.5$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Linux Kernel up to 6.19.11. This vulnerability affects the function array_index_nospec. Executing a manipulation can lead to null pointer dereference. This vulnerability is tracked as CVE-2026-31781. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability was found in Linux Kernel up to 6.19.11. It has been declared as critical. This vulnerability affects the function array_index_nospec. 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 availability. CVE summarizes:

In the Linux kernel, the following vulnerability has been resolved: drm/ioc32: stop speculation on the drm_compat_ioctl path The drm compat ioctl path takes a user controlled pointer, and then dereferences it into a table of function pointers, the signature method of spectre problems. Fix this up by calling array_index_nospec() on the index to the function pointer list.

The advisory is available at git.kernel.org. This vulnerability was named CVE-2026-31781 since 03/09/2026. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 316948 (Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-1746)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.10.253, 5.15.203, 6.1.168, 6.6.134, 6.12.81, 6.18.22 or 6.19.12 eliminates this vulnerability. Applying the patch 46a60ee8956ef1975f00455f614761c7ecedc09d/5bb398991f378ef74d90b14a6ea8b61ff96cc03a/d59c5d8539662d95887b4564f3f72ad38076a2d5/489f2ef2b908898d01df697dc4fe1476674be640/4a41c2b18fc05d30b718d2602cac339eae710b34/f0e441be08a2eab10b2d06fccfa267ee599dd6b3/27ef84bba9b9d7b03418c60fbc6069ea0e87b13c/f8995c2df519f382525ca4bc90553ad2ec611067 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (316948). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.7
VulDB Meta Temp Score: 5.5

VulDB Base Score: 5.7
VulDB Temp Score: 5.5
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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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: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 316948
Nessus Name: Amazon Linux 2023 : bpftool6.18, kernel6.18, kernel6.18-devel (ALAS2023-2026-1746)

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.10.253/5.15.203/6.1.168/6.6.134/6.12.81/6.18.22/6.19.12
Patch: 46a60ee8956ef1975f00455f614761c7ecedc09d/5bb398991f378ef74d90b14a6ea8b61ff96cc03a/d59c5d8539662d95887b4564f3f72ad38076a2d5/489f2ef2b908898d01df697dc4fe1476674be640/4a41c2b18fc05d30b718d2602cac339eae710b34/f0e441be08a2eab10b2d06fccfa267ee599dd6b3/27ef84bba9b9d7b03418c60fbc6069ea0e87b13c/f8995c2df519f382525ca4bc90553ad2ec611067

Timelineinfo

03/09/2026 CVE reserved
05/01/2026 +52 days Advisory disclosed
05/01/2026 +0 days VulDB entry created
05/28/2026 +27 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-31781 (🔒)
GCVE (CVE): GCVE-0-2026-31781
GCVE (VulDB): GCVE-100-360682

Entryinfo

Created: 05/01/2026 17:56
Updated: 05/28/2026 06:08
Changes: 05/01/2026 17:56 (58), 05/28/2026 06:08 (2)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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