7.8
CWE
416
Advisory Published
CVE Published
Updated

CVE-2023-52445: media: pvrusb2: fix use after free on context disconnection

First published: Thu Feb 22 2024(Updated: )

In the Linux kernel, the following vulnerability has been resolved: media: pvrusb2: fix use after free on context disconnection Upon module load, a kthread is created targeting the pvr2_context_thread_func function, which may call pvr2_context_destroy and thus call kfree() on the context object. However, that might happen before the usb hub_event handler is able to notify the driver. This patch adds a sanity check before the invalid read reported by syzbot, within the context disconnection call stack.

Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67

Affected SoftwareAffected VersionHow to fix
Linux Linux kernel<4.19.306
Linux Linux kernel>=4.20<5.4.268
Linux Linux kernel>=5.5.0<5.10.209
Linux Linux kernel>=5.11.0<5.15.148
Linux Linux kernel>=5.16.0<6.1.75
Linux Linux kernel>=6.2.0<6.6.14
Linux Linux kernel>=6.7.0<6.7.2
debian/linux
5.10.223-1
5.10.226-1
6.1.115-1
6.1.119-1
6.11.10-1
<4.19.306
>=4.20<5.4.268
>=5.5.0<5.10.209
>=5.11.0<5.15.148
>=5.16.0<6.1.75
>=6.2.0<6.6.14
>=6.7.0<6.7.2

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