Vulnerability-Lookup

GHSA-44V7-9MPR-QVFC

Vulnerability from github – Published: 2026-04-22 15:31 – Updated: 2026-04-22 15:31

Details

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.

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{
  "affected": [],
  "aliases": [
    "CVE-2026-31483"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-22T14:16:45Z",
    "severity": null
  },
  "details": "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.",
  "id": "GHSA-44v7-9mpr-qvfc",
  "modified": "2026-04-22T15:31:42Z",
  "published": "2026-04-22T15:31:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-31483"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1cb9c7bc9025c637564fabc7fcc3c9343949e310"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3c3b97064764899c39a0abbd35a6caa031e70333"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/48b8814e25d073dd84daf990a879a820bad2bcbd"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4d05dd18d867d58c6952a3bc260d244899da7256"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/7a5260fbc6e79a1595328ec5c6aa3f937504a1f0"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/87776f02449e3bded95b2ccbd6b012e9ae64e6f3"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f8c444b918d639e1f9a621ee20fe481c1d10dfc4"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

CVE-2026-31483 (GCVE-0-2026-31483)

Vulnerability from cvelistv5 – Published: 2026-04-22 13:54 – Updated: 2026-04-22 13:54

Title

s390/syscalls: Add spectre boundary for syscall dispatch table

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.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/3c3b97064764899c3…
	https://git.kernel.org/stable/c/1cb9c7bc9025c6375…
	https://git.kernel.org/stable/c/7a5260fbc6e79a159…
	https://git.kernel.org/stable/c/f8c444b918d639e1f…
	https://git.kernel.org/stable/c/87776f02449e3bded…
	https://git.kernel.org/stable/c/4d05dd18d867d58c6…
	https://git.kernel.org/stable/c/48b8814e25d073dd8…

Impacted products

Vendor

Product

Version

Linux

Affected: 56e62a73702836017564eaacd5212e4d0fa1c01d , < 3c3b97064764899c39a0abbd35a6caa031e70333 (git)
Affected: 56e62a73702836017564eaacd5212e4d0fa1c01d , < 1cb9c7bc9025c637564fabc7fcc3c9343949e310 (git)
Affected: 56e62a73702836017564eaacd5212e4d0fa1c01d , < 7a5260fbc6e79a1595328ec5c6aa3f937504a1f0 (git)
Affected: 56e62a73702836017564eaacd5212e4d0fa1c01d , < f8c444b918d639e1f9a621ee20fe481c1d10dfc4 (git)
Affected: 56e62a73702836017564eaacd5212e4d0fa1c01d , < 87776f02449e3bded95b2ccbd6b012e9ae64e6f3 (git)
Affected: 56e62a73702836017564eaacd5212e4d0fa1c01d , < 4d05dd18d867d58c6952a3bc260d244899da7256 (git)
Affected: 56e62a73702836017564eaacd5212e4d0fa1c01d , < 48b8814e25d073dd84daf990a879a820bad2bcbd (git)

Linux

Affected: 5.12
Unaffected: 0 , < 5.12 (semver)
Unaffected: 5.15.203 , ≤ 5.15.* (semver)
Unaffected: 6.1.168 , ≤ 6.1.* (semver)
Unaffected: 6.6.131 , ≤ 6.6.* (semver)
Unaffected: 6.12.80 , ≤ 6.12.* (semver)
Unaffected: 6.18.21 , ≤ 6.18.* (semver)
Unaffected: 6.19.11 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/s390/kernel/syscall.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3c3b97064764899c39a0abbd35a6caa031e70333",
              "status": "affected",
              "version": "56e62a73702836017564eaacd5212e4d0fa1c01d",
              "versionType": "git"
            },
            {
              "lessThan": "1cb9c7bc9025c637564fabc7fcc3c9343949e310",
              "status": "affected",
              "version": "56e62a73702836017564eaacd5212e4d0fa1c01d",
              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "56e62a73702836017564eaacd5212e4d0fa1c01d",
              "versionType": "git"
            },
            {
              "lessThan": "f8c444b918d639e1f9a621ee20fe481c1d10dfc4",
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              "versionType": "git"
            },
            {
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              "status": "affected",
              "version": "56e62a73702836017564eaacd5212e4d0fa1c01d",
              "versionType": "git"
            },
            {
              "lessThan": "4d05dd18d867d58c6952a3bc260d244899da7256",
              "status": "affected",
              "version": "56e62a73702836017564eaacd5212e4d0fa1c01d",
              "versionType": "git"
            },
            {
              "lessThan": "48b8814e25d073dd84daf990a879a820bad2bcbd",
              "status": "affected",
              "version": "56e62a73702836017564eaacd5212e4d0fa1c01d",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/s390/kernel/syscall.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.12"
            },
            {
              "lessThan": "5.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.203",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.168",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.131",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.80",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.21",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.203",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.168",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.131",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.80",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.21",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.11",
                  "versionStartIncluding": "5.12",
                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "5.12",
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                }
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              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-04-22T13:54:09.561Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "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"
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      "title": "s390/syscalls: Add spectre boundary for syscall dispatch table",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31483",
    "datePublished": "2026-04-22T13:54:09.561Z",
    "dateReserved": "2026-03-09T15:48:24.101Z",
    "dateUpdated": "2026-04-22T13:54:09.561Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-44V7-9MPR-QVFC

CVE-2026-31483 (GCVE-0-2026-31483)

Tags

Sightings

Nomenclature