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CVE-2022-50568

UnknownEPSS 0.20%

Last modified

CVE-2022-50568 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_hid: fix f_hidg lifetime vs cdev The embedded struct cdev does not have its lifetime correctly tied to the enclosing struct f_hidg, so there is a use-after-free if /dev/hidgN is held open while the gadget is deleted. This can readily be replicated with libusbgx's example programs (for conciseness - operating directly via configfs is equivalent): gadget-hid exec 3<> /dev/hidg0 gadget-vid-pid-remove exec 3<&- Pull the existing device up in to struct f_hidg and make use of the cdev_device_{add,del}() helpers. This changes the lifetime of the device object to match struct f_hidg, but note that it is still added and deleted at the same time.. EPSS estimates a 0.20% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_hid: fix f_hidg lifetime vs cdev The embedded struct cdev does not have its lifetime correctly tied to the enclosing struct f_hidg, so there is a use-after-free if /dev/hidgN is held open while the gadget is deleted. This can readily be replicated with libusbgx's example programs (for conciseness - operating directly via configfs is equivalent): gadget-hid exec 3<> /dev/hidg0 gadget-vid-pid-remove exec 3<&- Pull the existing device up in to struct f_hidg and make use of the cdev_device_{add,del}() helpers. This changes the lifetime of the device object to match struct f_hidg, but note that it is still added and deleted at the same time.

Metrics

EPSS Probability
0.20%

10.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 71adf118946957839a13aa4d1094183e05c6c094, < 1cd7f156f6389918f760687fbbf133c86da93162; >= 71adf118946957839a13aa4d1094183e05c6c094, < c78c87c4e389b62f8892af7f59857447aa6d9797; >= 71adf118946957839a13aa4d1094183e05c6c094, < 1b6a53e447ec3d81623610c8c7ec5082b47dfdce; >= 71adf118946957839a13aa4d1094183e05c6c094, < d3136b79705c2e3bba9c76adc5628af0215d798e; >= 71adf118946957839a13aa4d1094183e05c6c094, < 9e4b85d815b14bd4db2deea2a54264a23de8b896; >= 71adf118946957839a13aa4d1094183e05c6c094, < 9e08b7f5fa00e9d550851352bd0d1ba74ccffef2; >= 71adf118946957839a13aa4d1094183e05c6c094, < 89ff3dfac604614287ad5aad9370c3f984ea3f4b
LinuxLinux2.6.35

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2022-50568?
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_hid: fix f_hidg lifetime vs cdev The embedded struct cdev does not have its lifetime correctly tied to the enclosing struct f_hidg, so there is a use-after-free if /dev/hidgN is held open while the gadget is deleted. This can readily be replicated with libusbgx's example programs (for conciseness - operating directly via configfs is equivalent): gadget-hid exec 3<> /dev/hidg0 gadget-vid-pid-remove exec 3<&- Pull the existing device up in to struct f_hidg and make use of the cdev_device_{add,del}() helpers. This changes the lifetime of the device object to match struct f_hidg, but note that it is still added and deleted at the same time.
How severe is CVE-2022-50568?
Severity scoring for CVE-2022-50568 is pending analysis. The EPSS model estimates a 0.20% probability of exploitation in the next 30 days.
How do I fix CVE-2022-50568?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST