CVE-2026-31483

Summary

In the Linux kernel, the following vulnerability has been resolved:

s390/syscalls: Add spectre boundary for syscall dispatch table

The s390 syscall number is directly controlled by userspace, but does not have an array_index_nospec() boundary to prevent access past the syscall function pointer tables.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux56e62a73702836017564eaacd5212e4d0fa1c01d < 3c3b97064764899c39a0abbd35a6caa031e70333affected
LinuxLinux56e62a73702836017564eaacd5212e4d0fa1c01d < 1cb9c7bc9025c637564fabc7fcc3c9343949e310affected
LinuxLinux56e62a73702836017564eaacd5212e4d0fa1c01d < 7a5260fbc6e79a1595328ec5c6aa3f937504a1f0affected
LinuxLinux56e62a73702836017564eaacd5212e4d0fa1c01d < f8c444b918d639e1f9a621ee20fe481c1d10dfc4affected
LinuxLinux56e62a73702836017564eaacd5212e4d0fa1c01d < 87776f02449e3bded95b2ccbd6b012e9ae64e6f3affected
LinuxLinux56e62a73702836017564eaacd5212e4d0fa1c01d < 4d05dd18d867d58c6952a3bc260d244899da7256affected
LinuxLinux56e62a73702836017564eaacd5212e4d0fa1c01d < 48b8814e25d073dd84daf990a879a820bad2bcbdaffected
LinuxLinux5.12affected
LinuxLinux0 < 5.12unaffected
LinuxLinux5.15.203 <= 5.15.*unaffected
LinuxLinux6.1.168 <= 6.1.*unaffected
LinuxLinux6.6.131 <= 6.6.*unaffected
LinuxLinux6.12.80 <= 6.12.*unaffected
LinuxLinux6.18.21 <= 6.18.*unaffected
LinuxLinux6.19.11 <= 6.19.*unaffected
LinuxLinux7.0 <= *unaffected

Weaknesses

References