Linux Kernel up to 6.18.9 IRQ tegra_qspi_combined_seq_xfer curr_xfer null pointer dereference

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CTI Interest Score
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5.0$0-$5k0.00

Summaryinfo

A vulnerability was found in Linux Kernel up to 5.15.199/6.1.162/6.6.123/6.12.69/6.18.9. It has been classified as critical. This vulnerability affects the function tegra_qspi_combined_seq_xfer of the component IRQ Handler. The manipulation of the argument curr_xfer leads to null pointer dereference. This vulnerability is referenced as CVE-2026-23202. No exploit is available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.15.199/6.1.162/6.6.123/6.12.69/6.18.9. It has been rated as critical. This issue affects the function tegra_qspi_combined_seq_xfer of the component IRQ Handler. The manipulation of the argument curr_xfer with an unknown input leads to a null pointer dereference vulnerability. Using CWE to declare the problem leads to 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. Impacted is availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: spi: tegra210-quad: Protect curr_xfer in tegra_qspi_combined_seq_xfer The curr_xfer field is read by the IRQ handler without holding the lock to check if a transfer is in progress. When clearing curr_xfer in the combined sequence transfer loop, protect it with the spinlock to prevent a race with the interrupt handler. Protect the curr_xfer clearing at the exit path of tegra_qspi_combined_seq_xfer() with the spinlock to prevent a race with the interrupt handler that reads this field. Without this protection, the IRQ handler could read a partially updated curr_xfer value, leading to NULL pointer dereference or use-after-free.

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2026-23202 since 01/13/2026. The exploitation is known to be difficult. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 299091 (Linux Distros Unpatched Vulnerability : CVE-2026-23202), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.15.200, 6.1.163, 6.6.124, 6.12.70 or 6.18.10 eliminates this vulnerability. Applying the patch 9fa4262a80f751d14a6a39d2c03f57db68da2618/762e2ce71c8f0238e9eaf05d14da803d9a24422f/712cde8d916889e282727cdf304a43683adf899e/6fd446178a610a48e80e5c5b487b0707cd01daac/3bc293d5b56502068481478842f57b3d96e432c7/bf4528ab28e2bf112c3a2cdef44fd13f007781cd 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 databases at Tenable (299091), EUVD (EUVD-2026-5842) and CERT Bund (WID-SEC-2026-0421). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Affected

  • Google Container-Optimized OS
  • Debian Linux
  • Google Cloud Platform
  • Amazon Linux 2
  • Red Hat Enterprise Linux
  • Ubuntu Linux
  • SUSE Linux
  • Oracle Linux
  • SUSE openSUSE
  • RESF Rocky Linux
  • Open Source Linux Kernel
  • IBM QRadar SIEM

Productinfo

Type

Vendor

Name

Version

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 5.0

VulDB Base Score: 4.8
VulDB Temp Score: 4.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔒

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: Partially
Local: Yes
Remote: Partially

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 299091
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2026-23202

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Kernel 5.15.200/6.1.163/6.6.124/6.12.70/6.18.10
Patch: 9fa4262a80f751d14a6a39d2c03f57db68da2618/762e2ce71c8f0238e9eaf05d14da803d9a24422f/712cde8d916889e282727cdf304a43683adf899e/6fd446178a610a48e80e5c5b487b0707cd01daac/3bc293d5b56502068481478842f57b3d96e432c7/bf4528ab28e2bf112c3a2cdef44fd13f007781cd

Timelineinfo

01/13/2026 CVE reserved
02/14/2026 +32 days Advisory disclosed
02/14/2026 +0 days VulDB entry created
05/24/2026 +99 days VulDB entry last update

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2026-23202 (🔒)
GCVE (CVE): GCVE-0-2026-23202
GCVE (VulDB): GCVE-100-346085
EUVD: 🔒
CERT Bund: WID-SEC-2026-0421 - Linux Kernel: Mehrere Schwachstellen

Entryinfo

Created: 02/14/2026 19:03
Updated: 05/24/2026 22:12
Changes: 02/14/2026 19:03 (60), 02/15/2026 15:01 (2), 02/19/2026 14:44 (1), 03/19/2026 18:26 (11), 05/06/2026 04:07 (7), 05/24/2026 22:12 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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