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CVE-2022-49451

firmware: arm_scmi: Fix list protocols enumeration in the base protocol

CVSS 5.5 MEDIUMEPSS 0.3%CWE-190
In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Fix list protocols enumeration in the base protocol While enumerating protocols implemented by the SCMI platform using BASE_DISCOVER_LIST_PROTOCOLS, the number of returned protocols is currently validated in an improper way since the check employs a sum between unsigned integers that could overflow and cause the check itself to be silently bypassed if the returned value 'loop_num_ret' is big enough. Fix the validation avoiding the addition.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Affected products
Linux · Linux

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References
https://git.kernel.org/stable/c/1052f22e127d0c34c3387bb389424ba1c61491ffhttps://git.kernel.org/stable/c/2ccfcd7a09c826516edcfe464b05071961aada3fhttps://git.kernel.org/stable/c/444a2d27fe9867d0da4b28fc45b793f32e099ab8https://git.kernel.org/stable/c/6e7978695f4a6cbd83616b5a702b77fa2087b247https://git.kernel.org/stable/c/8009120e0354a67068e920eb10dce532391361d0https://git.kernel.org/stable/c/98342148a8cd242855d7e257f298c966c96dba9fhttps://git.kernel.org/stable/c/b0e4bafac8963c2d85ee18d3d01f393735acceec