CVE-2022-49001: riscv: fix race when vmap stack overflow
First published: Mon Oct 21 2024(Updated: )
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.]
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=5.14<5.15.82 | |
| Linux Kernel | >=5.16<6.0.12 | |
| Linux Kernel | =6.1-rc1 | |
| Linux Kernel | =6.1-rc2 | |
| Linux Kernel | =6.1-rc3 | |
| Linux Kernel | =6.1-rc4 | |
| Linux Kernel | =6.1-rc5 | |
| Linux Kernel | =6.1-rc6 | |
| Linux Kernel | =6.1-rc7 |
Never miss a vulnerability like this again
Sign up to SecAlerts for real-time vulnerability data matched to your software, aggregated from hundreds of sources.
Reference Links
Frequently Asked Questions
What is the severity of CVE-2022-49001?
CVE-2022-49001 is classified as a medium severity vulnerability in the Linux kernel.
How do I fix CVE-2022-49001?
To fix CVE-2022-49001, update your Linux kernel to the latest version recommended by your distribution.
Which versions of the Linux kernel are affected by CVE-2022-49001?
CVE-2022-49001 affects Linux kernel versions from 5.14 to 5.15.82 and also includes multiple release candidates of version 6.1.
What are the risks associated with CVE-2022-49001?
Exploitation of CVE-2022-49001 could lead to potential information leaks or unauthorized access due to stack overflow issues.
Is CVE-2022-49001 already patched?
Yes, CVE-2022-49001 has been resolved in the Linux kernel with updates available from the official repositories.
- agent/title
- agent/references
- agent/type
- agent/description
- agent/first-publish-date
- agent/author
- agent/event
- agent/remedy
- agent/weakness
- agent/severity
- agent/softwarecombine
- collector/mitre-cve
- source/MITRE
- agent/last-modified-date
- agent/source
- agent/tags
- collector/nvd-api
- source/NVD
- agent/software-canonical-lookup
- agent/software-canonical-lookup-request
- vendor/linux
- canonical/linux kernel
- version/linux kernel/5.14
- version/linux kernel/5.16
- version/linux kernel/6.1-rc1
- version/linux kernel/6.1-rc2
- version/linux kernel/6.1-rc3
- version/linux kernel/6.1-rc4
- version/linux kernel/6.1-rc5
- version/linux kernel/6.1-rc6
- version/linux kernel/6.1-rc7