CVE - CVE-2023-52765

CVE-ID
CVE-2023-52765	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
In the Linux kernel, the following vulnerability has been resolved: mfd: qcom-spmi-pmic: Fix revid implementation The Qualcomm SPMI PMIC revid implementation is broken in multiple ways. First, it assumes that just because the sibling base device has been registered that means that it is also bound to a driver, which may not be the case (e.g. due to probe deferral or asynchronous probe). This could trigger a NULL-pointer dereference when attempting to access the driver data of the unbound device. Second, it accesses driver data of a sibling device directly and without any locking, which means that the driver data may be freed while it is being accessed (e.g. on driver unbind). Third, it leaks a struct device reference to the sibling device which is looked up using the spmi_device_from_of() every time a function (child) device is calling the revid function (e.g. on probe). Fix this mess by reimplementing the revid lookup so that it is done only at probe of the PMIC device; the base device fetches the revid info from the hardware, while any secondary SPMI device fetches the information from the base device and caches it so that it can be accessed safely from its children. If the base device has not been probed yet then probe of a secondary device is deferred.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
MISC:https://git.kernel.org/stable/c/4ce77b023d42a9f1062eecf438df1af4b4072eb2 URL:https://git.kernel.org/stable/c/4ce77b023d42a9f1062eecf438df1af4b4072eb2 MISC:https://git.kernel.org/stable/c/7b439aaa62fee474a0d84d67a25f4984467e7b95 URL:https://git.kernel.org/stable/c/7b439aaa62fee474a0d84d67a25f4984467e7b95 MISC:https://git.kernel.org/stable/c/affae18838db5e6b463ee30c821385695af56dc2 URL:https://git.kernel.org/stable/c/affae18838db5e6b463ee30c821385695af56dc2 MISC:https://git.kernel.org/stable/c/db98de0809f12b0edb9cd1be78e1ec1bfeba8f40 URL:https://git.kernel.org/stable/c/db98de0809f12b0edb9cd1be78e1ec1bfeba8f40
Assigning CNA
kernel.org
Date Record Created
20240521	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20240521)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
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