CVE-2026-90161

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: erofs: fix interlaced ztailpacking pclusters On-disk sizes of interlaced pclusters should be block-aligned, and ztailpacking interlaced pclusters should be invalid at all. Currently, mkfs.erofs won't generate any interlaced pcluster with ztailpacking enabled, so this doesn't affect any existing valid filesystems. However, crafted images can contain invalid interlaced ztailpacking pclusters, resulting in an out-of-bounds read from a kmap'd page and copying irrelevant kernel memory into userspace-visible page cache.

Severity

HIGH

CVSS score

7.1 (v3.1)

Vulnerability status

Received

Source identifier

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

Published

2026-09-17 17:17:09.387000

Last modified

2026-10-30 13:20:44.337000

View original CVE JSON

{
  "id": "CVE-2026-90161",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-17T17:17:09.387",
  "lastModified": "2026-10-30T13:20:44.337",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nerofs: fix interlaced ztailpacking pclusters\n\nOn-disk sizes of interlaced pclusters should be block-aligned, and\nztailpacking interlaced pclusters should be invalid at all.\n\nCurrently, mkfs.erofs won't generate any interlaced pcluster with\nztailpacking enabled, so this doesn't affect any existing valid\nfilesystems.\n\nHowever, crafted images can contain invalid interlaced ztailpacking\npclusters, resulting in an out-of-bounds read from a kmap'd page and\ncopying irrelevant kernel memory into userspace-visible page cache."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "fs/erofs/decompressor.c",
            "fs/erofs/zmap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "fdffc091e6f94602558bba712b51bc16f79fd6d5",
              "lessThan": "b634286a8628155557a4f473a9dbab18bb439a7b",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "fdffc091e6f94602558bba712b51bc16f79fd6d5",
              "lessThan": "795dca34a41545d377d19bc492b10bc789772410",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "fdffc091e6f94602558bba712b51bc16f79fd6d5",
              "lessThan": "cd59f91cbc1e715cb5dc65773ee22123d70cb8f2",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "fdffc091e6f94602558bba712b51bc16f79fd6d5",
              "lessThan": "ddb7ea4fd99bf6c4314d1dfca18aec6945ce8054",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "fdffc091e6f94602558bba712b51bc16f79fd6d5",
              "lessThan": "451027c642e752420e1a04237db9ce7b35cee595",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "fdffc091e6f94602558bba712b51bc16f79fd6d5",
              "lessThan": "862427ebb81d1f6abbf74d799790e1694b37b187",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "7d6ef8277e44c22f894d54d26ddb36c22d60712d",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "6.0.16",
              "lessThan": "6.1",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "fs/erofs/decompressor.c",
            "fs/erofs/zmap.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.1",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.1",
              "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": "6.12.114",
              "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:N/UI:R/S:U/C:H/I:N/A:H",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "attackVector": "LOCAL",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "REQUIRED",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.8,
        "impactScore": 5.2
      }
    ]
  },
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/451027c642e752420e1a04237db9ce7b35cee595",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/795dca34a41545d377d19bc492b10bc789772410",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/862427ebb81d1f6abbf74d799790e1694b37b187",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/b634286a8628155557a4f473a9dbab18bb439a7b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/cd59f91cbc1e715cb5dc65773ee22123d70cb8f2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/ddb7ea4fd99bf6c4314d1dfca18aec6945ce8054",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}