The __get_user_asm_ex macro in arch/x86/include/asm/uaccess.h in the Linux kernel 4.4.22 through 4.4.28 contains extended asm statements that are incompatible with the exception table, which allows local users to obtain root access on non-SMEP platforms via a crafted application. NOTE: this vulnerability exists because of incorrect backporting of the CVE-2016-9178 patch to older kernels.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Linux_kernel | Linux | 4.4.22 (including) | 4.4.22 (including) |
| Linux_kernel | Linux | 4.4.23 (including) | 4.4.23 (including) |
| Linux_kernel | Linux | 4.4.24 (including) | 4.4.24 (including) |
| Linux_kernel | Linux | 4.4.25 (including) | 4.4.25 (including) |
| Linux_kernel | Linux | 4.4.26 (including) | 4.4.26 (including) |
| Linux_kernel | Linux | 4.4.27 (including) | 4.4.27 (including) |
| Linux_kernel | Linux | 4.4.28 (including) | 4.4.28 (including) |