CVE-2022-49852

Summary

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

riscv: process: fix kernel info leakage

thread_struct's s[12] may contain random kernel memory content, which may be finally leaked to userspace. This is a security hole. Fix it by clearing the s[12] array in thread_struct when fork.

As for kthread case, it's better to clear the s[12] array as well.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux7db91e57a0acde126a162ababfb1e0ab190130cb < c4601d30f7d989b4f354df899ab85b5f7a750d30affected
LinuxLinux7db91e57a0acde126a162ababfb1e0ab190130cb < c5c0b3167537793a7cf936fb240366eefd2fc7fbaffected
LinuxLinux7db91e57a0acde126a162ababfb1e0ab190130cb < e56d18a976dda653194218df6d40d8122c775712affected
LinuxLinux7db91e57a0acde126a162ababfb1e0ab190130cb < cc36c7fa5d9384602529ba3eea8c5daee7be4dbcaffected
LinuxLinux7db91e57a0acde126a162ababfb1e0ab190130cb < 358a68f98304b40b201ba5afe94c20355aa3dc68affected
LinuxLinux7db91e57a0acde126a162ababfb1e0ab190130cb < 6510c78490c490a6636e48b61eeaa6fb65981f4baffected
LinuxLinux4.15affected
LinuxLinux0 < 4.15unaffected
LinuxLinux4.19.267 <= 4.19.*unaffected
LinuxLinux5.4.225 <= 5.4.*unaffected
LinuxLinux5.10.155 <= 5.10.*unaffected
LinuxLinux5.15.79 <= 5.15.*unaffected
LinuxLinux6.0.9 <= 6.0.*unaffected
LinuxLinux6.1 <= *unaffected

Weaknesses

References