{"id":"CVE-2026-31483","state":"PUBLISHED","title":"s390/syscalls: Add spectre boundary for syscall dispatch table","description":"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() boundary to prevent access past the\nsyscall function pointer tables.","publishedAt":"2026-04-22T13:54:09.561Z","updatedAt":"2026-05-11T22:09:36.271Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"56e62a73702836017564eaacd5212e4d0fa1c01d","status":"affected","lessThan":"3c3b97064764899c39a0abbd35a6caa031e70333","versionType":"git"},{"version":"56e62a73702836017564eaacd5212e4d0fa1c01d","status":"affected","lessThan":"1cb9c7bc9025c637564fabc7fcc3c9343949e310","versionType":"git"},{"version":"56e62a73702836017564eaacd5212e4d0fa1c01d","status":"affected","lessThan":"7a5260fbc6e79a1595328ec5c6aa3f937504a1f0","versionType":"git"},{"version":"56e62a73702836017564eaacd5212e4d0fa1c01d","status":"affected","lessThan":"f8c444b918d639e1f9a621ee20fe481c1d10dfc4","versionType":"git"},{"version":"56e62a73702836017564eaacd5212e4d0fa1c01d","status":"affected","lessThan":"87776f02449e3bded95b2ccbd6b012e9ae64e6f3","versionType":"git"},{"version":"56e62a73702836017564eaacd5212e4d0fa1c01d","status":"affected","lessThan":"4d05dd18d867d58c6952a3bc260d244899da7256","versionType":"git"},{"version":"56e62a73702836017564eaacd5212e4d0fa1c01d","status":"affected","lessThan":"48b8814e25d073dd84daf990a879a820bad2bcbd","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/s390/kernel/syscall.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.12","versionType":"semver"},{"version":"5.15.203","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.168","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.131","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.80","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.21","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.11","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/s390/kernel/syscall.c"]}],"references":["https://git.kernel.org/stable/c/3c3b97064764899c39a0abbd35a6caa031e70333","https://git.kernel.org/stable/c/1cb9c7bc9025c637564fabc7fcc3c9343949e310","https://git.kernel.org/stable/c/7a5260fbc6e79a1595328ec5c6aa3f937504a1f0","https://git.kernel.org/stable/c/f8c444b918d639e1f9a621ee20fe481c1d10dfc4","https://git.kernel.org/stable/c/87776f02449e3bded95b2ccbd6b012e9ae64e6f3","https://git.kernel.org/stable/c/4d05dd18d867d58c6952a3bc260d244899da7256","https://git.kernel.org/stable/c/48b8814e25d073dd84daf990a879a820bad2bcbd"],"weaknesses":[],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/31xxx/CVE-2026-31483.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-31483","state":"PUBLISHED","datePublished":"2026-04-22T13:54:09.561Z","dateUpdated":"2026-05-11T22:09:36.271Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-03-09T15:48:24.101Z"},"containers":{"cna":{"title":"s390/syscalls: Add spectre boundary for syscall dispatch table","descriptions":[{"lang":"en","value":"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() boundary to prevent access past the\nsyscall function pointer tables."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"56e62a73702836017564eaacd5212e4d0fa1c01d","status":"affected","lessThan":"3c3b97064764899c39a0abbd35a6caa031e70333","versionType":"git"},{"version":"56e62a73702836017564eaacd5212e4d0fa1c01d","status":"affected","lessThan":"1cb9c7bc9025c637564fabc7fcc3c9343949e310","versionType":"git"},{"version":"56e62a73702836017564eaacd5212e4d0fa1c01d","status":"affected","lessThan":"7a5260fbc6e79a1595328ec5c6aa3f937504a1f0","versionType":"git"},{"version":"56e62a73702836017564eaacd5212e4d0fa1c01d","status":"affected","lessThan":"f8c444b918d639e1f9a621ee20fe481c1d10dfc4","versionType":"git"},{"version":"56e62a73702836017564eaacd5212e4d0fa1c01d","status":"affected","lessThan":"87776f02449e3bded95b2ccbd6b012e9ae64e6f3","versionType":"git"},{"version":"56e62a73702836017564eaacd5212e4d0fa1c01d","status":"affected","lessThan":"4d05dd18d867d58c6952a3bc260d244899da7256","versionType":"git"},{"version":"56e62a73702836017564eaacd5212e4d0fa1c01d","status":"affected","lessThan":"48b8814e25d073dd84daf990a879a820bad2bcbd","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/s390/kernel/syscall.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.12","versionType":"semver"},{"version":"5.15.203","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.168","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.131","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.80","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.21","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"6.19.11","status":"unaffected","lessThanOrEqual":"6.19.*","versionType":"semver"},{"version":"7.0","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["arch/s390/kernel/syscall.c"]}],"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"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T22:09:36.271Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"5.15.203"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.1.168"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.6.131"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.12.80"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.18.21"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"6.19.11"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.12","versionEndExcluding":"7.0"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}