What’s Vulnerable › Vulnerabilities

CVE-2026-45993: LoongArch: Add spectre boundry for syscall dispatch table

• Severity: medium (CVSS 5.5 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: 2026-05-27 · updated 2026-06-19

Description

In the Linux kernel, the following vulnerability has been resolved: LoongArch: Add spectre boundry for syscall dispatch table The LoongArch syscall number is directly controlled by userspace, but does not have a array_index_nospec() boundry to prevent access past the syscall function pointer tables.

Affected products

• Linux kernel: from 5.19 before 6.6.140; from 6.7 before 6.12.86; from 6.13 before 6.18.27; from 6.19 before 7.0.4 — fixed in 6.12.86, 6.18.27, 6.6.140, 7.0.4

How to fix

Upgrade to a fixed version: Linux kernel 6.12.86, 6.18.27, 6.6.140, 7.0.4. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/07040904ad217545be096d4280ed33c02f6a3750
• https://git.kernel.org/stable/c/0c965d2784fbbd7f8e3b96d875c9cfdf7c00da3d
• https://git.kernel.org/stable/c/108f2cd13577a410c0ad6ea00708596d9d0dfc90
• https://git.kernel.org/stable/c/85cbf7fb568af5358aae61925c4e66b8f5e1439d
• https://git.kernel.org/stable/c/bc84a109c2082dd0c4b38e8d923c046b41977533
• https://git.kernel.org/stable/c/c8a8e863928424046b8fd328f02c359baa0a0c3f

Get alerted when CVE-2026-45993 or the next vulnerability affects your stack