Vulnerability 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 Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Linux | Linux Kernel | >= 5.14, < 5.15.82 |
Related Weaknesses (CWE)
References
- https://git.kernel.org/stable/c/7e1864332fbc1b993659eab7974da9fe8bf8c128Patch
- https://git.kernel.org/stable/c/879fabc5a95401d9bce357e4b1d24ae4a360a81fPatch
- https://git.kernel.org/stable/c/ac00301adb19df54f2eae1efc4bad7447c0156cePatch
FAQ
What is CVE-2022-49001?
CVE-2022-49001 is a vulnerability with a CVSS score of 7.0 (HIGH). 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 sh...
How severe is CVE-2022-49001?
CVE-2022-49001 has been rated HIGH with a CVSS base score of 7.0/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2022-49001?
Check the references section above for vendor advisories and patch information. Affected products include: Linux Linux Kernel.