CVE-2026-23202: spi: tegra210-quad: Protect curr_xfer in tegra_qspi_combined_seq_xfer

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-02-14 · updated 2026-10-19
Weakness: CWE-476

Description

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.

Affected products

Linux kernel: from 5.15.198 before 5.15.200; from 6.1.160 before 6.1.163; from 6.6.120 before 6.6.124; from 6.12.63 before 6.12.70; from 6.17.13 before 6.18; from 6.18.2 before 6.18.10 — fixed in 5.15.200, 6.1.163, 6.12.70, 6.18, 6.18.10, 6.6.124

How to fix

Upgrade to a fixed version: Linux kernel 5.15.200, 6.1.163, 6.12.70, 6.18. Check the vendor advisory for mitigations.

References

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