Medium 5.5Published Mar 25, 2026

CVE-2026-23357can: mcp251x: fix deadlock in error path of mcp251x_open

Updated under an hour ago (Oct 27, 2026, 8:00 PM ET)

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It affects Linux and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 14, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from bf66f3736a945dd4e92d86427276c6eeab0a6c1d before 739454057572cb0948658d1142f3fa2c6966465c; from bf66f3736a945dd4e92d86427276c6eeab0a6c1d before 416c18ecddafab0ed09be1e7b9d2f448f3d4db16; from bf66f3736a945dd4e92d86427276c6eeab0a6c1d before 256f0cff6e946c570392bda1d01a65e789a7afd0; from bf66f3736a945dd4e92d86427276c6eeab0a6c1d before b73832292cd914e87a55e863ba4413a907e7db6b; from bf66f3736a945dd4e92d86427276c6eeab0a6c1d before 38063cc435b69d56e76f947c10d336fcb2953508; from bf66f3736a945dd4e92d86427276c6eeab0a6c1d before d27f12c3f5e85efc479896af4a69eccb37f75e8e; from bf66f3736a945dd4e92d86427276c6eeab0a6c1d before e728f444c913a91d290d1824b4770780bbd6378e; from bf66f3736a945dd4e92d86427276c6eeab0a6c1d before ab3f894de216f4a62adc3b57e9191888cbf26885	CNA record
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name)	all versions	CISA ADP
linux linux_kernel linux:linux_kernel	from 2.6.34.1 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.167; from 6.2 before 6.6.130; from 6.7 before 6.12.77; from 6.13 before 6.18.17; from 6.19 before 6.19.7; 2.6.34; and 7 more ranges	NVD

References

References

https://git.kernel.org/stable/c/739454057572cb0948658d1142f3fa2c6966465c	patch
https://git.kernel.org/stable/c/416c18ecddafab0ed09be1e7b9d2f448f3d4db16	patch
https://git.kernel.org/stable/c/256f0cff6e946c570392bda1d01a65e789a7afd0	patch
https://git.kernel.org/stable/c/b73832292cd914e87a55e863ba4413a907e7db6b	patch
https://git.kernel.org/stable/c/38063cc435b69d56e76f947c10d336fcb2953508	patch
https://git.kernel.org/stable/c/d27f12c3f5e85efc479896af4a69eccb37f75e8e	patch
https://git.kernel.org/stable/c/e728f444c913a91d290d1824b4770780bbd6378e	patch
https://git.kernel.org/stable/c/ab3f894de216f4a62adc3b57e9191888cbf26885	patch
https://cert-portal.siemens.com/productcert/html/ssa-784472.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.