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CVE-2023-54027

UnknownEPSS 0.15%

Last modified

CVE-2023-54027 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: iio: core: Prevent invalid memory access when there is no parent Commit 813665564b3d ("iio: core: Convert to use firmware node handle instead of OF node") switched the kind of nodes to use for label retrieval in device registration. Probably an unwanted change in that commit was that if the device has no parent then NULL pointer is accessed. EPSS estimates a 0.15% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: iio: core: Prevent invalid memory access when there is no parent Commit 813665564b3d ("iio: core: Convert to use firmware node handle instead of OF node") switched the kind of nodes to use for label retrieval in device registration. Probably an unwanted change in that commit was that if the device has no parent then NULL pointer is accessed. This is what happens in the stock IIO dummy driver when a new entry is created in configfs: # mkdir /sys/kernel/config/iio/devices/dummy/foo BUG: kernel NULL pointer dereference, address: ... ... Call Trace: __iio_device_register iio_dummy_probe Since there seems to be no reason to make a parent device of an IIO dummy device mandatory, let’s prevent the invalid memory access in __iio_device_register when the parent device is NULL. With this change, the IIO dummy driver works fine with configfs.

Metrics

EPSS Probability
0.15%

5.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

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

VendorProductVersions
LinuxLinux>= 813665564b3d7c74412fe2877520f1d254ce948a, < 312f04ede209f0a186799fe8e64a19b49700d5dc; >= 813665564b3d7c74412fe2877520f1d254ce948a, < a4b34cccff14ce74bb7d77fbfd56e7c9d7c28a97; >= 813665564b3d7c74412fe2877520f1d254ce948a, < b2a69969908fcaf68596dfc04369af0fe2e1d2f7
LinuxLinux5.19

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2023-54027?
In the Linux kernel, the following vulnerability has been resolved: iio: core: Prevent invalid memory access when there is no parent Commit 813665564b3d ("iio: core: Convert to use firmware node handle instead of OF node") switched the kind of nodes to use for label retrieval in device registration. Probably an unwanted change in that commit was that if the device has no parent then NULL pointer is accessed. This is what happens in the stock IIO dummy driver when a new entry is created in configfs: # mkdir /sys/kernel/config/iio/devices/dummy/foo BUG: kernel NULL pointer dereference, address: ... ... Call Trace: __iio_device_register iio_dummy_probe Since there seems to be no reason to make a parent device of an IIO dummy device mandatory, let’s prevent the invalid memory access in __iio_device_register when the parent device is NULL. With this change, the IIO dummy driver works fine with configfs.
How severe is CVE-2023-54027?
Severity scoring for CVE-2023-54027 is pending analysis. The EPSS model estimates a 0.15% probability of exploitation in the next 30 days.
How do I fix CVE-2023-54027?
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