CVE WatchAug 4, 2026

CVE-2022-49001

In the Linux kernel, the following vulnerability has been resolved: riscv: fix race when vmap stack overflow Currently, when detecting vma

CVSS

7.0

High

EPSS

0.2%

KEV

—

Exploit Today

0-100

Published: Oct 21, 2024 · Last modified: Aug 4, 2026 · CWE-362

EPSS · 30d

0.2%EPSS · 30 days0.2%

2026-07-112026-08-08

Technical 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.]

Official references

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