CVE-2026-31483

s390/syscalls: Add spectre boundary for syscall dispatch table

State: Published
Severity: Not scored
Published: Apr 22, 2026
Updated: May 11, 2026
Reserved: Mar 9, 2026

Description

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	56e62a73702836017564eaacd5212e4d0fa1c01d to before 3c3b97064764899c39a0abbd35a6caa031e70333Affected 56e62a73702836017564eaacd5212e4d0fa1c01d to before 1cb9c7bc9025c637564fabc7fcc3c9343949e310Affected 56e62a73702836017564eaacd5212e4d0fa1c01d to before 7a5260fbc6e79a1595328ec5c6aa3f937504a1f0Affected 56e62a73702836017564eaacd5212e4d0fa1c01d to before f8c444b918d639e1f9a621ee20fe481c1d10dfc4Affected 56e62a73702836017564eaacd5212e4d0fa1c01d to before 87776f02449e3bded95b2ccbd6b012e9ae64e6f3Affected 56e62a73702836017564eaacd5212e4d0fa1c01d to before 4d05dd18d867d58c6952a3bc260d244899da7256Affected 56e62a73702836017564eaacd5212e4d0fa1c01d to before 48b8814e25d073dd84daf990a879a820bad2bcbdAffected
LinuxLinux	5.12Affected before 5.12Not affected 5.15.203 through 5.15.Not affected 6.1.168 through 6.1.Not affected 6.6.131 through 6.6.Not affected 6.12.80 through 6.12.Not affected 6.18.21 through 6.18.Not affected 6.19.11 through 6.19.Not affected 7.0 and laterNot affected

Product

Versions

LinuxLinux

56e62a73702836017564eaacd5212e4d0fa1c01d to before 3c3b97064764899c39a0abbd35a6caa031e70333Affected
56e62a73702836017564eaacd5212e4d0fa1c01d to before 1cb9c7bc9025c637564fabc7fcc3c9343949e310Affected
56e62a73702836017564eaacd5212e4d0fa1c01d to before 7a5260fbc6e79a1595328ec5c6aa3f937504a1f0Affected
56e62a73702836017564eaacd5212e4d0fa1c01d to before f8c444b918d639e1f9a621ee20fe481c1d10dfc4Affected
56e62a73702836017564eaacd5212e4d0fa1c01d to before 87776f02449e3bded95b2ccbd6b012e9ae64e6f3Affected
56e62a73702836017564eaacd5212e4d0fa1c01d to before 4d05dd18d867d58c6952a3bc260d244899da7256Affected
56e62a73702836017564eaacd5212e4d0fa1c01d to before 48b8814e25d073dd84daf990a879a820bad2bcbdAffected

LinuxLinux

5.12Affected
before 5.12Not affected
5.15.203 through 5.15.*Not affected
6.1.168 through 6.1.*Not affected
6.6.131 through 6.6.*Not affected
6.12.80 through 6.12.*Not affected
6.18.21 through 6.18.*Not affected
6.19.11 through 6.19.*Not affected
7.0 and laterNot affected

References

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