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CVE-2026-23207

N/A Unknown
Denial of Service

📋 TL;DR

This CVE describes a race condition vulnerability in the Linux kernel's Tegra210 Quad SPI driver that could lead to a NULL pointer dereference. The vulnerability occurs when the interrupt service routine (ISR) thread and timeout path simultaneously access the curr_xfer pointer without proper synchronization, potentially causing a kernel panic. This affects systems using the Tegra210 Quad SPI driver in the Linux kernel.

💻 Affected Systems

Products:
  • Linux kernel with Tegra210 Quad SPI driver
Versions: Linux kernel versions containing the vulnerable code prior to the fix commits
Operating Systems: Linux distributions using affected kernel versions
Default Config Vulnerable: ⚠️ Yes
Notes: Only affects systems using the tegra210-quad SPI driver, typically found on NVIDIA Tegra-based platforms.

⚠️ Manual Verification Required

This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.

Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).

🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.

Recommended Actions:
  1. Review the CVE details at NVD
  2. Check vendor security advisories for your specific version
  3. Test if the vulnerability is exploitable in your environment
  4. Consider updating to the latest version as a precaution

⚠️ Risk & Real-World Impact

🔴

Worst Case

Kernel panic leading to system crash and denial of service, potentially requiring physical access to restart the affected device.

🟠

Likely Case

System instability or crash when SPI operations timeout under specific timing conditions, causing temporary denial of service.

🟢

If Mitigated

No impact if the race condition doesn't occur or if the system isn't using the affected SPI driver.

🌐 Internet-Facing: LOW - This is a local kernel driver vulnerability requiring local access to the SPI subsystem.
🏢 Internal Only: MEDIUM - Could be exploited by local users or processes with access to SPI operations to cause system instability.

🎯 Exploit Status

Public PoC: ✅ No
Weaponized: UNKNOWN
Unauthenticated Exploit: ✅ No
Complexity: MEDIUM

Exploitation requires triggering specific race conditions in SPI operations, making timing critical and somewhat unpredictable.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Linux kernel with commits 2ac3a105e51496147c0e44e49466eecfcc532d57 and edf9088b6e1d6d88982db7eb5e736a0e4fbcc09e

Vendor Advisory: https://git.kernel.org/stable/c/2ac3a105e51496147c0e44e49466eecfcc532d57

Restart Required: Yes

Instructions:

1. Update Linux kernel to version containing the fix commits. 2. Reboot system to load patched kernel. 3. Verify the fix by checking kernel version and ensuring SPI operations function normally.

🔧 Temporary Workarounds

Disable Tegra210 Quad SPI driver

Linux

If SPI functionality is not required, disable the vulnerable driver module

echo 'blacklist spi-tegra210-quad' >> /etc/modprobe.d/blacklist.conf
rmmod spi_tegra210_quad

🧯 If You Can't Patch

  • Monitor system logs for kernel panics or SPI-related errors
  • Implement strict access controls to limit who can access SPI devices

🔍 How to Verify

Check if Vulnerable:

Check if the tegra210-quad SPI driver is loaded: lsmod | grep spi_tegra210_quad

Check Version:

uname -r

Verify Fix Applied:

Check kernel version includes fix commits: grep -q '2ac3a105e51496147c0e44e49466eecfcc532d57\|edf9088b6e1d6d88982db7eb5e736a0e4fbcc09e' /proc/version

📡 Detection & Monitoring

Log Indicators:

  • Kernel panic messages
  • NULL pointer dereference errors in dmesg
  • SPI timeout or error messages

Network Indicators:

  • None - this is a local kernel vulnerability

SIEM Query:

source="kernel" AND ("NULL pointer dereference" OR "kernel panic" OR "tegra_qspi")

📊 Metadata

CVE ID: CVE-2026-23207
CVSS v3 Score: N/A (Unknown)
Published: February 14, 2026
Last Updated: February 18, 2026

🔗 References

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