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PUBLISHED

CVE-2024-36896

USB: core: Fix access violation during port device removal

Reserved:2024-05-30
Published:2024-05-30
Updated:2024-06-06

Description

In the Linux kernel, the following vulnerability has been resolved: USB: core: Fix access violation during port device removal Testing with KASAN and syzkaller revealed a bug in port.c:disable_store(): usb_hub_to_struct_hub() can return NULL if the hub that the port belongs to is concurrently removed, but the function does not check for this possibility before dereferencing the returned value. It turns out that the first dereference is unnecessary, since hub->intfdev is the parent of the port device, so it can be changed easily. Adding a check for hub == NULL prevents further problems. The same bug exists in the disable_show() routine, and it can be fixed the same way.

Product status

Default status
unaffected

f061f43d7418 before 5f1d68ef5dda
affected

f061f43d7418 before 63533549ff53
affected

f061f43d7418 before 6119ef6517ce
affected

f061f43d7418 before a4b46d450c49
affected

Default status
affected

6.0
affected

Any version before 6.0
unaffected

6.1.91
unaffected

6.6.31
unaffected

6.8.10
unaffected

6.9
unaffected

References

https://git.kernel.org/stable/c/5f1d68ef5ddac27c6b997adccd1c339cef1e6848

https://git.kernel.org/stable/c/63533549ff53d24daf47c443dbd43c308afc3434

https://git.kernel.org/stable/c/6119ef6517ce501fc548154691abdaf1f954a277

https://git.kernel.org/stable/c/a4b46d450c49f32e9d4247b421e58083fde304ce

cve.org CVE-2024-36896

nvd.nist.gov CVE-2024-36896

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