CVE-2024-46791

Source
https://nvd.nist.gov/vuln/detail/CVE-2024-46791
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2024-46791.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2024-46791
Downstream
Related
Published
2024-09-18T08:15:06Z
Modified
2025-08-09T20:01:27Z
Severity
  • 5.5 (Medium) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

can: mcp251x: fix deadlock if an interrupt occurs during mcp251x_open

The mcp251xhwwake() function is called with the mpc_lock mutex held and disables the interrupt handler so that no interrupts can be processed while waking the device. If an interrupt has already occurred then waiting for the interrupt handler to complete will deadlock because it will be trying to acquire the same mutex.

CPU0 CPU1 ---- ---- mcp251xopen() mutexlock(&priv->mcplock) requestthreadedirq() <interrupt> mcp251xcanist() mutexlock(&priv->mcplock) mcp251xhwwake() disableirq() <-- deadlock

Use disableirqnosync() instead because the interrupt handler does everything while holding the mutex so it doesn't matter if it's still running.

References

Affected packages