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.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/c4d6a347ba7babdf9d90a0eb24048c266cae0532	Patch
https://git.kernel.org/stable/c/f223d2b4acb7a45a6e0581cb380e1af1a6dc7ab9	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:6.11:rc1::::::

History

03 Sep 2024, 13:44

Type	Values Removed	Values Added
CPE		cpe:2.3:o:linux:linux_kernel:::::::: cpe:2.3:o:linux:linux_kernel:6.11:rc1::::::
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 5.5
References	~~() https://git.kernel.org/stable/c/c4d6a347ba7babdf9d90a0eb24048c266cae0532 -~~	() https://git.kernel.org/stable/c/c4d6a347ba7babdf9d90a0eb24048c266cae0532 - Patch
References	~~() https://git.kernel.org/stable/c/f223d2b4acb7a45a6e0581cb380e1af1a6dc7ab9 -~~	() https://git.kernel.org/stable/c/f223d2b4acb7a45a6e0581cb380e1af1a6dc7ab9 - Patch
CWE		CWE-667
First Time		Linux Linux linux Kernel

21 Aug 2024, 12:30

Type	Values Removed	Values Added
New CVE

Information

Published : 2024-08-21 00:15

Updated : 2024-09-03 13:44

NVD link : CVE-2024-43862

Mitre link : CVE-2024-43862

CVE.ORG link : CVE-2024-43862

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-667

Improper Locking

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