CVE-2026-52979

In the Linux kernel, the following vulnerability has been resolved: net: psp: check for device unregister when creating assoc psp_assoc_device_get_locked() obtains a psp_dev reference via psp_dev_get_for_sock() (which uses psp_dev_tryget() under RCU); it then acquires psd->lock and drops the reference. Before the lock is taken, psp_dev_unregister() can run to completion: take psd->lock, clear out state, unlock, drop the registration reference. The expectation is that the lock prevents device unregistration, but much like with netdevs special care has to be taken when "upgrading" a reference to a locked device. Add the missing check if device is still alive. psp_dev_is_registered() exists already but had no callers, which makes me wonder if I either forgot to add this or lost the check during refactoring...

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/b89769f936a8fa9e66de72ddc1b71a9745a488e6	Patch
https://git.kernel.org/stable/c/d90df5ce6deb2424de3ad89bcc693ac1b67accc9	Patch
https://git.kernel.org/stable/c/e201c57073e624dd2ba5beaf9eda31e19b77b332	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:7.1:rc1::::::

History

No history.

Information

Published : 2026-06-24 17:17

Updated : 2026-07-14 16:51

NVD link : CVE-2026-52979

Mitre link : CVE-2026-52979

CVE.ORG link : CVE-2026-52979

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-667

Improper Locking

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