CVE-2026-23357
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.
Does this matter?
Lower severity and a low EPSS score (0.10%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 3.1
- 5.5 MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.10% probability · 1th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-667
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/256f0cff6e946c570392bda1d01a65e789a7afd0Patch
- https://git.kernel.org/stable/c/38063cc435b69d56e76f947c10d336fcb2953508Patch
- https://git.kernel.org/stable/c/416c18ecddafab0ed09be1e7b9d2f448f3d4db16Patch
- https://git.kernel.org/stable/c/739454057572cb0948658d1142f3fa2c6966465cPatch
- https://git.kernel.org/stable/c/ab3f894de216f4a62adc3b57e9191888cbf26885Patch
- https://git.kernel.org/stable/c/b73832292cd914e87a55e863ba4413a907e7db6bPatch
- https://git.kernel.org/stable/c/d27f12c3f5e85efc479896af4a69eccb37f75e8ePatch
- https://git.kernel.org/stable/c/e728f444c913a91d290d1824b4770780bbd6378ePatch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.