CVE-2022-49001
HIGH EPSS 8.9%
Published Oct 21, 20241y ago · Modified Jun 17, 20262w ago
7.0 CVSS 3.1
Published Oct 21, 2024 1y ago
Last Modified Jun 17, 2026 2w ago
Description
In the Linux kernel, the following vulnerability has been resolved: riscv: fix race when vmap stack overflow Currently, when detecting vmap stack overflow, riscv firstly switches to the so called shadow stack, then use this shadow stack to call the get_overflow_stack() to get the overflow stack. However, there's a race here if two or more harts use the same shadow stack at the same time. To solve this race, we introduce spin_shadow_stack atomic var, which will be swap between its own address and 0 in atomic way, when the var is set, it means the shadow_stack is being used; when the var is cleared, it means the shadow_stack isn't being used. [Palmer: Add AQ to the swap, and also some comments.]
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector Local
Attack Complexity High
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High
Threat Intelligence
EPSS Exploit Probability
8.9% percentile
Exploit & Patch Status
No Known Exploit
Patch Available
Weaknesses 1
CWE-362
Affected Products 9
References 3
- git.kernel.org https://git.kernel.org/stable/c/7e1864332fbc1b993659eab7974da9fe8bf8c128
- git.kernel.org https://git.kernel.org/stable/c/879fabc5a95401d9bce357e4b1d24ae4a360a81f
- git.kernel.org https://git.kernel.org/stable/c/ac00301adb19df54f2eae1efc4bad7447c0156ce
Remediation
- git.kernel.org https://git.kernel.org/stable/c/7e1864332fbc1b993659eab7974da9fe8bf8c128
- git.kernel.org https://git.kernel.org/stable/c/879fabc5a95401d9bce357e4b1d24ae4a360a81f
- git.kernel.org https://git.kernel.org/stable/c/ac00301adb19df54f2eae1efc4bad7447c0156ce