CVE-2026-23357

Description

In the Linux kernel, the following vulnerability has been resolved: can: mcp251x: fix deadlock in error path of mcp251x_open The mcp251x_open() function call free_irq() in its error path with the mpc_lock mutex held. But if an interrupt already occurred the interrupt handler will be waiting for the mpc_lock and free_irq() will deadlock waiting for the handler to finish. This issue is similar to the one fixed in commit 7dd9c26bd6cf ("can: mcp251x: fix deadlock if an interrupt occurs during mcp251x_open") but for the error path. To solve this issue move the call to free_irq() after the lock is released. Setting `priv->force_quit = 1` beforehand ensure that the IRQ handler will exit right away once it acquired the lock.

PUBLISHED Reserved 2026-01-13 | Published 2026-03-25 | Updated 2026-05-11 | Assigner Linux

Product status

References

git.kernel.org/...c/739454057572cb0948658d1142f3fa2c6966465c

git.kernel.org/...c/416c18ecddafab0ed09be1e7b9d2f448f3d4db16

git.kernel.org/...c/256f0cff6e946c570392bda1d01a65e789a7afd0

git.kernel.org/...c/b73832292cd914e87a55e863ba4413a907e7db6b

git.kernel.org/...c/38063cc435b69d56e76f947c10d336fcb2953508

git.kernel.org/...c/d27f12c3f5e85efc479896af4a69eccb37f75e8e

git.kernel.org/...c/e728f444c913a91d290d1824b4770780bbd6378e

git.kernel.org/...c/ab3f894de216f4a62adc3b57e9191888cbf26885

cve.org (CVE-2026-23357)

nvd.nist.gov (CVE-2026-23357)

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