Vulnerability Details CVE-2024-43862
In the Linux kernel, the following vulnerability has been resolved:
net: wan: fsl_qmc_hdlc: Convert carrier_lock spinlock to a mutex
The carrier_lock spinlock protects the carrier detection. While it is
held, framer_get_status() is called which in turn takes a mutex.
This is not correct and can lead to a deadlock.
A run with PROVE_LOCKING enabled detected the issue:
[ BUG: Invalid wait context ]
...
c204ddbc (&framer->mutex){+.+.}-{3:3}, at: framer_get_status+0x40/0x78
other info that might help us debug this:
context-{4:4}
2 locks held by ifconfig/146:
#0: c0926a38 (rtnl_mutex){+.+.}-{3:3}, at: devinet_ioctl+0x12c/0x664
#1: c2006a40 (&qmc_hdlc->carrier_lock){....}-{2:2}, at: qmc_hdlc_framer_set_carrier+0x30/0x98
Avoid the spinlock usage and convert carrier_lock to a mutex.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 8.7%
CVSS Severity
CVSS v3 Score 5.5
References
Products affected by CVE-2024-43862
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cpe:2.3:o:linux:linux_kernel:6.10
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cpe:2.3:o:linux:linux_kernel:6.10.0
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cpe:2.3:o:linux:linux_kernel:6.10.1
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cpe:2.3:o:linux:linux_kernel:6.10.2
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cpe:2.3:o:linux:linux_kernel:6.10.3
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cpe:2.3:o:linux:linux_kernel:6.11
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cpe:2.3:o:linux:linux_kernel:6.9
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cpe:2.3:o:linux:linux_kernel:6.9.1
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cpe:2.3:o:linux:linux_kernel:6.9.10
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cpe:2.3:o:linux:linux_kernel:6.9.11
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cpe:2.3:o:linux:linux_kernel:6.9.12
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cpe:2.3:o:linux:linux_kernel:6.9.2
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cpe:2.3:o:linux:linux_kernel:6.9.3
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cpe:2.3:o:linux:linux_kernel:6.9.4
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cpe:2.3:o:linux:linux_kernel:6.9.5
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cpe:2.3:o:linux:linux_kernel:6.9.6
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cpe:2.3:o:linux:linux_kernel:6.9.7
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cpe:2.3:o:linux:linux_kernel:6.9.8
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cpe:2.3:o:linux:linux_kernel:6.9.9