CVE-2023-54087

Description

In the Linux kernel, the following vulnerability has been resolved: ubi: Fix possible null-ptr-deref in ubi_free_volume() It willl cause null-ptr-deref in the following case: uif_init() ubi_add_volume() cdev_add() -> if it fails, call kill_volumes() device_register() kill_volumes() -> if ubi_add_volume() fails call this function ubi_free_volume() cdev_del() device_unregister() -> trying to delete a not added device, it causes null-ptr-deref So in ubi_free_volume(), it delete devices whether they are added or not, it will causes null-ptr-deref. Handle the error case whlie calling ubi_add_volume() to fix this problem. If add volume fails, set the corresponding vol to null, so it can not be accessed in kill_volumes() and release the resource in ubi_add_volume() error path.

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References

Other References

https://git.kernel.org/stable/c/234c53e57424992e657e6f4acc00d3df0983176f https://git.kernel.org/stable/c/2ea7195b195009ecf0046e55361f393ba96d02db https://git.kernel.org/stable/c/45b2c5ca4d2edae70f19fdb086bd927840c4c309 https://git.kernel.org/stable/c/5558bcf1c58720ca6e9d6198d921cb3aa337f038 https://git.kernel.org/stable/c/5ec4c8aca5a221756a9007deadfea92795319fee https://git.kernel.org/stable/c/9eccdb0760cbcb4427b5303a83a3007de998af51 https://git.kernel.org/stable/c/c15859bfd326c10230f09cb48a17f8a35f190342 https://git.kernel.org/stable/c/fcbc795abe7897da4b5d2a6ab5010e36774b00c2

Frequently Asked Questions

What is CVE-2023-54087? +

In the Linux kernel, the following vulnerability has been resolved: ubi: Fix possible null-ptr-deref in ubi_free_volume() It willl cause null-ptr-deref in the following case: uif_init() ubi_add_volume() cdev_add() -> if it fails, call kill_volumes() device_register() kill_volumes() -> if ubi_add_volume() fails call this function ubi_free_volume() cdev_del() device_unregister() -> trying to delete a not added device, it causes null-ptr-deref So in ubi_free_volume(), it delete devices whether they are added or not, it will causes null-ptr-deref. Handle the error case whlie calling ubi_add_volume() to fix this problem. If add volume fails, set the corresponding vol to null, so it can not be accessed in kill_volumes() and release the resource in ubi_add_volume() error path.

How do I check if I'm vulnerable to CVE-2023-54087? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

CVE-2023-54087

Description

References

Other References

Frequently Asked Questions

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