CVE-2026-90383

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: misc: sgi-gru: remove interrupt-context page-table walks The GRU TLB miss handler walks a process's page tables without holding page-table locks or a reference to the mapped page. It also uses a kernel page-table accessor on user page tables and supports only PMD-level large mappings on x86-64. Remove the direct walker. Send interrupt faults directly to user polling mode so the existing call-OS fallback retries them in process context. Remove the mmap-lock failure statistic that can no longer be incremented.

Severity

HIGH

CVSS score

7.8 (v3.1)

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-09-17 17:17:37.660000

Last modified

2026-10-30 13:20:51.780000

View original CVE JSON

{
  "id": "CVE-2026-90383",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-17T17:17:37.660",
  "lastModified": "2026-10-30T13:20:51.780",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmisc: sgi-gru: remove interrupt-context page-table walks\n\nThe GRU TLB miss handler walks a process's page tables without holding\npage-table locks or a reference to the mapped page. It also uses a kernel\npage-table accessor on user page tables and supports only PMD-level large\nmappings on x86-64.\n\nRemove the direct walker. Send interrupt faults directly to user polling\nmode so the existing call-OS fallback retries them in process context.\n\nRemove the mmap-lock failure statistic that can no longer be incremented."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "drivers/misc/sgi-gru/grufault.c",
            "drivers/misc/sgi-gru/gruprocfs.c",
            "drivers/misc/sgi-gru/grutables.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "142586409c8be7dc071bb94d7cd2d69ccfd99b6b",
              "lessThan": "0ca505b973aa1a5e3fcca7bd04774e794ff5e662",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "142586409c8be7dc071bb94d7cd2d69ccfd99b6b",
              "lessThan": "5a540ced720b4397306337cab34af1af4b30827c",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "142586409c8be7dc071bb94d7cd2d69ccfd99b6b",
              "lessThan": "877423f595b60f8fe7c18b64a5d283d9e1732a13",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "142586409c8be7dc071bb94d7cd2d69ccfd99b6b",
              "lessThan": "6248eb1833ff0adfdbbadd5f846c2f22e02a01b0",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "142586409c8be7dc071bb94d7cd2d69ccfd99b6b",
              "lessThan": "ef81e4a1628ecfb9cfc442de10883f383faf17a1",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "142586409c8be7dc071bb94d7cd2d69ccfd99b6b",
              "lessThan": "928a8e9f523df845fc496bcb9811013b67aabec5",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "drivers/misc/sgi-gru/grufault.c",
            "drivers/misc/sgi-gru/gruprocfs.c",
            "drivers/misc/sgi-gru/grutables.h"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "2.6.27",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "2.6.27",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.1.191",
              "lessThanOrEqual": "6.1.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.6.160",
              "lessThanOrEqual": "6.6.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.110",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.52",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.6",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 7.8,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.9
      }
    ]
  },
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0ca505b973aa1a5e3fcca7bd04774e794ff5e662",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/5a540ced720b4397306337cab34af1af4b30827c",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/6248eb1833ff0adfdbbadd5f846c2f22e02a01b0",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/877423f595b60f8fe7c18b64a5d283d9e1732a13",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/928a8e9f523df845fc496bcb9811013b67aabec5",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ef81e4a1628ecfb9cfc442de10883f383faf17a1",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}