CVE-2024-46791
Linux MCP251X Interrupt Handler Deadlock in Mutex Acquisition
Description
In the Linux kernel, the following vulnerability has been resolved: can: mcp251x: fix deadlock if an interrupt occurs during mcp251x_open The mcp251x_hw_wake() 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 ---- ---- mcp251x_open() mutex_lock(&priv->mcp_lock) request_threaded_irq() <interrupt> mcp251x_can_ist() mutex_lock(&priv->mcp_lock) mcp251x_hw_wake() disable_irq() <-- deadlock Use disable_irq_nosync() instead because the interrupt handler does everything while holding the mutex so it doesn't matter if it's still running.
INFO
Published Date :
Sept. 18, 2024, 8:15 a.m.
Last Modified :
Sept. 20, 2024, 6:21 p.m.
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Remotely Exploitable :
No
Impact Score :
3.6
Exploitability Score :
1.8
References to Advisories, Solutions, and Tools
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CVE-2024-46791.
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The following list is the news that have been mention
CVE-2024-46791 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2024-46791 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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Initial Analysis by [email protected]
Sep. 20, 2024
Action Type Old Value New Value Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H Changed Reference Type https://git.kernel.org/stable/c/3a49b6b1caf5cefc05264d29079d52c99cb188e0 No Types Assigned https://git.kernel.org/stable/c/3a49b6b1caf5cefc05264d29079d52c99cb188e0 Patch Changed Reference Type https://git.kernel.org/stable/c/513c8fc189b52f7922e36bdca58997482b198f0e No Types Assigned https://git.kernel.org/stable/c/513c8fc189b52f7922e36bdca58997482b198f0e Patch Changed Reference Type https://git.kernel.org/stable/c/7dd9c26bd6cf679bcfdef01a8659791aa6487a29 No Types Assigned https://git.kernel.org/stable/c/7dd9c26bd6cf679bcfdef01a8659791aa6487a29 Patch Changed Reference Type https://git.kernel.org/stable/c/8fecde9c3f9a4b97b68bb97c9f47e5b662586ba7 No Types Assigned https://git.kernel.org/stable/c/8fecde9c3f9a4b97b68bb97c9f47e5b662586ba7 Patch Changed Reference Type https://git.kernel.org/stable/c/e554113a1cd2a9cfc6c7af7bdea2141c5757e188 No Types Assigned https://git.kernel.org/stable/c/e554113a1cd2a9cfc6c7af7bdea2141c5757e188 Patch Changed Reference Type https://git.kernel.org/stable/c/f7ab9e14b23a3eac6714bdc4dba244d8aa1ef646 No Types Assigned https://git.kernel.org/stable/c/f7ab9e14b23a3eac6714bdc4dba244d8aa1ef646 Patch Added CWE NIST CWE-667 Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.226 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.167 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.110 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.51 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.10.10 *cpe:2.3:o:linux:linux_kernel:6.11:rc1:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.11:rc2:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.11:rc3:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.11:rc4:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.11:rc5:*:*:*:*:*:* *cpe:2.3:o:linux:linux_kernel:6.11:rc6:*:*:*:*:*:* -
CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 18, 2024
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: can: mcp251x: fix deadlock if an interrupt occurs during mcp251x_open The mcp251x_hw_wake() 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 ---- ---- mcp251x_open() mutex_lock(&priv->mcp_lock) request_threaded_irq() <interrupt> mcp251x_can_ist() mutex_lock(&priv->mcp_lock) mcp251x_hw_wake() disable_irq() <-- deadlock Use disable_irq_nosync() instead because the interrupt handler does everything while holding the mutex so it doesn't matter if it's still running. Added Reference kernel.org https://git.kernel.org/stable/c/3a49b6b1caf5cefc05264d29079d52c99cb188e0 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/513c8fc189b52f7922e36bdca58997482b198f0e [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/f7ab9e14b23a3eac6714bdc4dba244d8aa1ef646 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/8fecde9c3f9a4b97b68bb97c9f47e5b662586ba7 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/e554113a1cd2a9cfc6c7af7bdea2141c5757e188 [No types assigned] Added Reference kernel.org https://git.kernel.org/stable/c/7dd9c26bd6cf679bcfdef01a8659791aa6487a29 [No types assigned]
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2024-46791 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2024-46791
weaknesses.