What’s Vulnerable › Vulnerabilities

CVE-2025-71203: riscv: Sanitize syscall table indexing under speculation

• Severity: high (CVSS 7.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-02-14 · updated 2026-06-17
• Weakness: CWE-129

Description

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 array_index_nospec() to clamp this value after the bounds check to prevent speculative out-of-bounds access and subsequent data leakage via cache side channels.

Affected products

• Linux kernel: from 6.4 before 6.12.70; from 6.13 before 6.18.10; 6.19-rc1, 6.19-rc2, 6.19-rc3, 6.19-rc4 — fixed in 6.12.70, 6.18.10

How to fix

Upgrade to a fixed version: Linux kernel 6.12.70, 6.18.10. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/25fd7ee7bf58ac3ec7be3c9f82ceff153451946c
• https://git.kernel.org/stable/c/33743ec6679aa364ee19d1afbaa50593e9e6e443
• https://git.kernel.org/stable/c/8b44e753795107a22ba31495686e83f4aca48f36
• https://git.kernel.org/stable/c/c45848936ebdb4fcab92f8c39510db83c16d0239

Get alerted when CVE-2025-71203 or the next vulnerability affects your stack