CVE-2022-49852
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.20%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.1 HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
- EPSS
- 0.20% probability · 10th percentile
- CISA KEV
- Not listed
- Affected
- linux/linux kernel
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/358a68f98304b40b201ba5afe94c20355aa3dc68Patch
- https://git.kernel.org/stable/c/6510c78490c490a6636e48b61eeaa6fb65981f4bPatch
- https://git.kernel.org/stable/c/c4601d30f7d989b4f354df899ab85b5f7a750d30Patch
- https://git.kernel.org/stable/c/c5c0b3167537793a7cf936fb240366eefd2fc7fbPatch
- https://git.kernel.org/stable/c/cc36c7fa5d9384602529ba3eea8c5daee7be4dbcPatch
- https://git.kernel.org/stable/c/e56d18a976dda653194218df6d40d8122c775712Patch
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.