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

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于mcp251x_open错误路径中持有锁时调用free_irq，可能导致死锁。

AI Predicted 5.0 Difficulty: Theoretical EPSS 0.10% · P1

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux bf66f3736a945dd4e92d86427276c6eeab0a6c1d< 739454057572cb0948658d1142f3fa2c6966465c affected
bf66f3736a945dd4e92d86427276c6eeab0a6c1d< 416c18ecddafab0ed09be1e7b9d2f448f3d4db16 affected
bf66f3736a945dd4e92d86427276c6eeab0a6c1d< 256f0cff6e946c570392bda1d01a65e789a7afd0 affected
bf66f3736a945dd4e92d86427276c6eeab0a6c1d< b73832292cd914e87a55e863ba4413a907e7db6b affected
bf66f3736a945dd4e92d86427276c6eeab0a6c1d< 38063cc435b69d56e76f947c10d336fcb2953508 affected
bf66f3736a945dd4e92d86427276c6eeab0a6c1d< d27f12c3f5e85efc479896af4a69eccb37f75e8e affected
bf66f3736a945dd4e92d86427276c6eeab0a6c1d< e728f444c913a91d290d1824b4770780bbd6378e affected
bf66f3736a945dd4e92d86427276c6eeab0a6c1d< ab3f894de216f4a62adc3b57e9191888cbf26885 affected
… +10 more rows
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I. Basic Information for CVE-2026-23357

Vulnerability Information
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Vulnerability Title
can: mcp251x: fix deadlock in error path of mcp251x_open
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于mcp251x_open错误路径中持有锁时调用free_irq，可能导致死锁。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux bf66f3736a945dd4e92d86427276c6eeab0a6c1d ~ 739454057572cb0948658d1142f3fa2c6966465c -
Linux Linux 2.6.34 -

II. Public POCs for CVE-2026-23357

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III. Intelligence Information for CVE-2026-23357

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Patches & Fixes for CVE-2026-23357 (6)

Same Patch Batch · Linux · 2026-03-25 · 116 CVEs total

CVE-2026-23395 8.8 HIGH Bluetooth: L2CAP: Fix accepting multiple L2CAP_ECRED_CONN_REQ
CVE-2026-31788 8.2 HIGH xen/privcmd: restrict usage in unprivileged domU
CVE-2026-23340 7.8 HIGH net: sched: avoid qdisc_reset_all_tx_gt() vs dequeue race for lockless qdiscs
CVE-2026-23336 7.8 HIGH wifi: cfg80211: cancel rfkill_block work in wiphy_unregister()
CVE-2026-23350 7.8 HIGH drm/xe/queue: Call fini on exec queue creation fail
CVE-2026-23351 7.8 HIGH netfilter: nft_set_pipapo: split gc into unlink and reclaim phase
CVE-2026-23317 7.8 HIGH drm/vmwgfx: Return the correct value in vmw_translate_ptr functions
CVE-2026-23306 7.8 HIGH scsi: pm8001: Fix use-after-free in pm8001_queue_command()
CVE-2026-23372 7.8 HIGH nfc: rawsock: cancel tx_work before socket teardown
CVE-2026-23378 7.8 HIGH net/sched: act_ife: Fix metalist update behavior
CVE-2026-23383 7.8 HIGH bpf, arm64: Force 8-byte alignment for JIT buffer to prevent atomic tearing
CVE-2026-23391 7.8 HIGH netfilter: xt_CT: drop pending enqueued packets on template removal
CVE-2026-23392 7.8 HIGH netfilter: nf_tables: release flowtable after rcu grace period on error
CVE-2026-23393 7.8 HIGH bridge: cfm: Fix race condition in peer_mep deletion
CVE-2026-23280 7.8 HIGH accel/amdxdna: Prevent ubuf size overflow
CVE-2026-23288 7.8 HIGH accel/amdxdna: Fix out-of-bounds memset in command slot handling
CVE-2026-23364 7.4 HIGH ksmbd: Compare MACs in constant time
CVE-2026-23294 7.0 HIGH bpf: Fix race in devmap on PREEMPT_RT
CVE-2026-23354 x86/fred: Correct speculative safety in fred_extint()
CVE-2026-23356 drbd: fix "LOGIC BUG" in drbd_al_begin_io_nonblock()

Showing top 20 of 116 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-23357

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