CVE-2026-45993 LoongArch: Add spectre boundry for syscall dispatch table
Missing Spectre mitigation in LoongArch syscall dispatch allows speculative execution attacks to leak kernel memory.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-45993?
CVE-2026-45993 is a medium-severity vulnerability in Linux kernel, published on 27 May 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-45993?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-45993?
Apply the vendor's patch.
Is CVE-2026-45993 being exploited?
There is no known exploitation of CVE-2026-45993 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-88590, BELL-CVE-2026-45993, DEBIAN-CVE-2026-45993, GHSA-r2fv-v53q-68f3, ROOT-OS-DEBIAN-11-CVE-2026-45993, ROOT-OS-DEBIAN-12-CVE-2026-45993 and 3 more.