CVE-2022-50575

Summary

In the Linux kernel, the following vulnerability has been resolved:

xen/privcmd: Fix a possible warning in privcmd_ioctl_mmap_resource()

As 'kdata.num' is user-controlled data, if user tries to allocate memory larger than(>=) MAX_ORDER, then kcalloc() will fail, it creates a stack trace and messes up dmesg with a warning.

Call trace: -> privcmd_ioctl –> privcmd_ioctl_mmap_resource

Add __GFP_NOWARN in order to avoid too large allocation warning. This is detected by static analysis using smatch.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux3ad0876554cafa368f574d4d408468510543e9ff < 5d68ae32d132ea2af73bc223fd64c46f85302a8baffected
LinuxLinux3ad0876554cafa368f574d4d408468510543e9ff < 4f983ee5e5de924d93a7bbb4e6f68f38c6256cd5affected
LinuxLinux3ad0876554cafa368f574d4d408468510543e9ff < 46026bb057c35f5bb111bf95e00cd8366d2e34d4affected
LinuxLinux3ad0876554cafa368f574d4d408468510543e9ff < 0bf874183b32eae2cc20e3c5be38ec3d33e7e564affected
LinuxLinux3ad0876554cafa368f574d4d408468510543e9ff < e0c5f1058ed96f2b7487560c4c4cbd768d13d065affected
LinuxLinux3ad0876554cafa368f574d4d408468510543e9ff < 4da411086f5ab32f811a89ef804980ec106ebb65affected
LinuxLinux3ad0876554cafa368f574d4d408468510543e9ff < 8b997b2bb2c53b76a6db6c195930e9ab8e4b0c79affected
LinuxLinux4.18affected
LinuxLinux0 < 4.18unaffected
LinuxLinux4.19.270 <= 4.19.*unaffected
LinuxLinux5.4.229 <= 5.4.*unaffected
LinuxLinux5.10.163 <= 5.10.*unaffected
LinuxLinux5.15.86 <= 5.15.*unaffected
LinuxLinux6.0.16 <= 6.0.*unaffected
LinuxLinux6.1.2 <= 6.1.*unaffected
LinuxLinux6.2 <= *unaffected

Weaknesses

References