Bug 2363701 (CVE-2023-53059)

Summary: CVE-2023-53059 kernel: platform/chrome: cros_ec_chardev: fix kernel data leak from ioctl
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedCC: dfreiber, drow, jburrell, vkumar
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Hardware: All   
OS: Linux   
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Description OSIDB Bzimport 2025-05-02 16:02:21 UTC 
In the Linux kernel, the following vulnerability has been resolved:

platform/chrome: cros_ec_chardev: fix kernel data leak from ioctl

It is possible to peep kernel page's data by providing larger `insize`
in struct cros_ec_command[1] when invoking EC host commands.

Fix it by using zeroed memory.

[1]: https://elixir.bootlin.com/linux/v6.2/source/include/linux/platform_data/cros_ec_proto.h#L74
Comment 1 Avinash Hanwate 2025-05-05 05:36:13 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025050209-CVE-2023-53059-47f3@gregkh/T