{
  "cveId": "CVE-2026-31568",
  "url": "https://patchblox.com/security/cve/CVE-2026-31568",
  "summary": "CVE-2026-31568 is fixed in 14 products on 1 platform, first by DEBIAN-CVE-2026-31568, released May 15, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "s390/mm: Add missing secure storage access fixups for donated memory",
  "description": "In the Linux kernel, the following vulnerability has been resolved:  s390/mm: Add missing secure storage access fixups for donated memory  There are special cases where secure storage access exceptions happen in a kernel context for pages that don\u0027t have the PG_arch_1 bit set. That bit is set for non-exported guest secure storage (memory) but is absent on storage donated to the Ultravisor since the kernel isn\u0027t allowed to export donated pages.  Prior to this patch we would try to export the page by calling arch_make_folio_accessible() which would instantly return since the arch bit is absent signifying that the page was already exported and no further action is necessary. This leads to secure storage access exception loops which can never be resolved.  With this patch we unconditionally try to export and if that fails we fixup.",
  "published": "2026-04-24T15:16:31Z",
  "severity": "Moderate",
  "cvss": 7.1,
  "cvssVector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
  "epss": 0.00159,
  "epssPercentile": 0.05056,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-31568",
  "fixes": [
    {
      "platform": "linux",
      "product": "kernel-64kb",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.73.2",
      "fix": "SUSE-SU-2026:3166-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-3166-1",
      "released": "2026-07-21T17:09:27Z"
    },
    {
      "platform": "linux",
      "product": "kernel-64kb",
      "release": "sles 16.0",
      "fixedVersion": "6.12.0-160000.34.1",
      "fix": "SUSE-SU-2026:22087-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-22087-1",
      "released": "2026-06-05T17:10:52Z"
    },
    {
      "platform": "linux",
      "product": "kernel-azure",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.73.2",
      "fix": "SUSE-SU-2026:3166-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-3166-1",
      "released": "2026-07-21T17:09:27Z"
    },
    {
      "platform": "linux",
      "product": "kernel-azure",
      "release": "sles 16.0",
      "fixedVersion": "6.12.0-160000.34.1",
      "fix": "SUSE-SU-2026:22087-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-22087-1",
      "released": "2026-06-05T17:10:52Z"
    },
    {
      "platform": "linux",
      "product": "kernel-default",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.73.2",
      "fix": "SUSE-SU-2026:3166-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-3166-1",
      "released": "2026-07-21T17:09:27Z"
    },
    {
      "platform": "linux",
      "product": "kernel-default",
      "release": "sles 16.0",
      "fixedVersion": "6.12.0-160000.34.1",
      "fix": "SUSE-SU-2026:22087-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-22087-1",
      "released": "2026-06-05T17:10:52Z"
    },
    {
      "platform": "linux",
      "product": "kernel-default-base",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.73.2.150700.17.41.4",
      "fix": "SUSE-SU-2026:3166-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-3166-1",
      "released": "2026-07-21T17:09:27Z"
    },
    {
      "platform": "linux",
      "product": "kernel-default-base",
      "release": "sles 16.0",
      "fixedVersion": "6.12.0-160000.34.1.160000.2.15",
      "fix": "SUSE-SU-2026:22087-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-22087-1",
      "released": "2026-06-05T17:10:52Z"
    },
    {
      "platform": "linux",
      "product": "kernel-docs",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.73.1",
      "fix": "SUSE-SU-2026:3166-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-3166-1",
      "released": "2026-07-21T17:09:27Z"
    },
    {
      "platform": "linux",
      "product": "kernel-docs",
      "release": "sles 16.0",
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      "fix": "SUSE-SU-2026:22087-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-22087-1",
      "released": "2026-06-05T17:10:52Z"
    },
    {
      "platform": "linux",
      "product": "kernel-kvmsmall",
      "release": "sles 16.0",
      "fixedVersion": "6.12.0-160000.34.1",
      "fix": "SUSE-SU-2026:22087-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-22087-1",
      "released": "2026-06-05T17:10:52Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-SLE15-SP7-RT_Update_18",
      "release": "sles 15.7",
      "fixedVersion": "1-150700.1.5.1",
      "fix": "SUSE-SU-2026:3130-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-3130-1",
      "released": "2026-07-20T12:25:31Z"
    },
    {
      "platform": "linux",
      "product": "kernel-livepatch-SLE15-SP7_Update_19",
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      "fix": "SUSE-SU-2026:3166-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-3166-1",
      "released": "2026-07-21T17:09:27Z"
    },
    {
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      "fix": "SUSE-SU-2026:3166-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-3166-1",
      "released": "2026-07-21T17:09:27Z"
    },
    {
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      "fixedVersion": "6.12.0-160000.34.1",
      "fix": "SUSE-SU-2026:22087-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-22087-1",
      "released": "2026-06-05T17:10:52Z"
    },
    {
      "platform": "linux",
      "product": "kernel-source",
      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.73.1",
      "fix": "SUSE-SU-2026:3166-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-3166-1",
      "released": "2026-07-21T17:09:27Z"
    },
    {
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      "fix": "SUSE-SU-2026:22087-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-22087-1",
      "released": "2026-06-05T17:10:52Z"
    },
    {
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      "release": "sles 15.7",
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      "fix": "SUSE-SU-2026:3166-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-3166-1",
      "released": "2026-07-21T17:09:27Z"
    },
    {
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      "fix": "SUSE-SU-2026:22087-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-22087-1",
      "released": "2026-06-05T17:10:52Z"
    },
    {
      "platform": "linux",
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      "release": "sles 15.7",
      "fixedVersion": "6.4.0-150700.53.73.2",
      "fix": "SUSE-SU-2026:3166-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-3166-1",
      "released": "2026-07-21T17:09:27Z"
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      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-22087-1",
      "released": "2026-06-05T17:10:52Z"
    },
    {
      "platform": "linux",
      "product": "linux",
      "release": "Debian 14",
      "fixedVersion": "6.19.11-1",
      "fix": "DEBIAN-CVE-2026-31568",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-31568",
      "released": "2026-05-15T16:01:09Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}