CVE-2025-71203: riscv: Sanitize syscall table indexing under speculation
In the Linux kernel, the following vulnerability has been resolved:
riscv: Sanitize syscall table indexing under speculation
The syscall number is a user-controlled value used to index into the syscall table. Use arrayindexnospec() to clamp this value after the bounds check to prevent speculative out-of-bounds access and subsequent data leakage via cache side channels.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
debian/linuxto a version that resolves this vulnerability.Fixed in 6.1.176-1Fixed in 6.1.190-1Fixed in 6.12.107-1Fixed in 6.12.113-1Fixed in 7.2.12-1Fixed in 7.2.14-1
Event History
Frequently Asked Questions
What is the severity of CVE-2025-71203?
The severity of CVE-2025-71203 is classified as high, due to its potential impact on system integrity.
How do I fix CVE-2025-71203?
To fix CVE-2025-71203, ensure that your Linux kernel is updated to the latest version in which the vulnerability has been addressed.
What systems are affected by CVE-2025-71203?
CVE-2025-71203 affects the RISC-V architecture in the Linux kernel.
What type of vulnerability is CVE-2025-71203?
CVE-2025-71203 is a security vulnerability related to improper handling of syscall table indexing under speculation.
Can CVE-2025-71203 be exploited remotely?
CVE-2025-71203 may allow local attackers to exploit the vulnerability to gain elevated privileges.