{"id":"CVE-2026-31483","title":"s390/syscalls: Add spectre boundary for syscall dispatch table","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ns390/syscalls: Add spectre boundary for syscall dispatch table\n\nThe s390 syscall number is directly controlled by userspace, but does\nnot have an array_index_nospec() b…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 56e62a73702836017564eaacd5212e4d0fa1c01d < 3c3b97064764899c39a0abbd35a6caa031e70333","Linux >= 56e62a73702836017564eaacd5212e4d0fa1c01d < 1cb9c7bc9025c637564fabc7fcc3c9343949e310","Linux >= 56e62a73702836017564eaacd5212e4d0fa1c01d < 7a5260fbc6e79a1595328ec5c6aa3f937504a1f0","Linux >= 56e62a73702836017564eaacd5212e4d0fa1c01d < f8c444b918d639e1f9a621ee20fe481c1d10dfc4","Linux >= 56e62a73702836017564eaacd5212e4d0fa1c01d < 87776f02449e3bded95b2ccbd6b012e9ae64e6f3","Linux >= 56e62a73702836017564eaacd5212e4d0fa1c01d < 4d05dd18d867d58c6952a3bc260d244899da7256","Linux >= 56e62a73702836017564eaacd5212e4d0fa1c01d < 48b8814e25d073dd84daf990a879a820bad2bcbd","Linux 5.12"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T21:34:44.578683Z"},"published":"2026-04-22","updated":"2026-11-05","sourceUpdated":"2026-11-05T21:45:01.265Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-31483","references":[{"url":"https://git.kernel.org/stable/c/3c3b97064764899c39a0abbd35a6caa031e70333"},{"url":"https://git.kernel.org/stable/c/1cb9c7bc9025c637564fabc7fcc3c9343949e310"},{"url":"https://git.kernel.org/stable/c/7a5260fbc6e79a1595328ec5c6aa3f937504a1f0"},{"url":"https://git.kernel.org/stable/c/f8c444b918d639e1f9a621ee20fe481c1d10dfc4"},{"url":"https://git.kernel.org/stable/c/87776f02449e3bded95b2ccbd6b012e9ae64e6f3"},{"url":"https://git.kernel.org/stable/c/4d05dd18d867d58c6952a3bc260d244899da7256"},{"url":"https://git.kernel.org/stable/c/48b8814e25d073dd84daf990a879a820bad2bcbd"}],"tags":["cve.org"],"epss":0.00123,"epssPercentile":0.02031,"ingestedAt":"2026-11-05T22:38:32.150Z","slug":"CVE-2026-31483","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ns390/syscalls: Add spectre boundary for syscall dispatch table\n\nThe s390 syscall number is directly controlled by userspace, but does\nnot have an array_index_nospec() boundary to prevent access past the\nsyscall function pointer tables.\n\n## Affected\n\n- `Linux >= 56e62a73702836017564eaacd5212e4d0fa1c01d < 3c3b97064764899c39a0abbd35a6caa031e70333`\n- `Linux >= 56e62a73702836017564eaacd5212e4d0fa1c01d < 1cb9c7bc9025c637564fabc7fcc3c9343949e310`\n- `Linux >= 56e62a73702836017564eaacd5212e4d0fa1c01d < 7a5260fbc6e79a1595328ec5c6aa3f937504a1f0`\n- `Linux >= 56e62a73702836017564eaacd5212e4d0fa1c01d < f8c444b918d639e1f9a621ee20fe481c1d10dfc4`\n- `Linux >= 56e62a73702836017564eaacd5212e4d0fa1c01d < 87776f02449e3bded95b2ccbd6b012e9ae64e6f3`\n- `Linux >= 56e62a73702836017564eaacd5212e4d0fa1c01d < 4d05dd18d867d58c6952a3bc260d244899da7256`\n- `Linux >= 56e62a73702836017564eaacd5212e4d0fa1c01d < 48b8814e25d073dd84daf990a879a820bad2bcbd`\n- `Linux 5.12`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}