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CVE-2026-90262

Status: ReceivedUnscored—

In the Linux kernel, the following vulnerability has been resolved:

btrfs: retry verity reads for not-uptodate Merkle folios

btrfs_read_merkle_tree_page() can find a folio in the mapping that is not uptodate. After taking the folio lock, the current code treats that state as a read error and returns -EIO.

That can make a previous transient read failure sticky. If the failed read left a not-uptodate folio in the mapping, later callers find that folio and fail instead of retrying the read.

Keep the existing page-cache insertion and locking order, but retry the Merkle item read when a not-uptodate folio is found in the mapping. Also unlock the folio when read_key_bytes() fails so that a later caller can lock it and retry the read.

CVSS

NVD hasn't assigned a CVSS score to this CVE (common since the April 2026 policy change).

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Linux — Linux KernelAI

References

Raw JSON (NVD)

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{
  "id": "CVE-2026-90262",
  "cveTags": [],
  "metrics": {},
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "06ed09351b67eb1114ae106a87a0ee3ea9adb3db",
              "lessThan": "90e9eae1b5907fa36620ffb7f4f1a4afa9333427",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "06ed09351b67eb1114ae106a87a0ee3ea9adb3db",
              "lessThan": "c1fa005cdf3b7ff14cdfd7d512830088a3fc256b",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "06ed09351b67eb1114ae106a87a0ee3ea9adb3db",
              "lessThan": "12b6d1a1715cbced2e445ca353f9c9987b8636e2",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "06ed09351b67eb1114ae106a87a0ee3ea9adb3db",
              "lessThan": "81241f734f0f662378f5ffc53882b012923e6fe5",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "06ed09351b67eb1114ae106a87a0ee3ea9adb3db",
              "lessThan": "8cc569696dac51fc62bb39b3b8f530582b916d29",
              "versionType": "git"
            }
          ],
          "programFiles": [
            "fs/btrfs/verity.c"
          ],
          "defaultStatus": "unaffected"
        },
        {
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "product": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.6"
            },
            {
              "status": "unaffected",
              "version": "0",
              "lessThan": "6.6",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver",
              "lessThanOrEqual": "6.6.*"
            },
            {
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver",
              "lessThanOrEqual": "6.12.*"
            },
            {
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver",
              "lessThanOrEqual": "6.18.*"
            },
            {
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver",
              "lessThanOrEqual": "7.2.*"
            },
            {
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix",
              "lessThanOrEqual": "*"
            }
          ],
          "programFiles": [
            "fs/btrfs/verity.c"
          ],
          "defaultStatus": "affected"
        }
      ]
    }
  ],
  "published": "2026-09-17T17:17:22.640",
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/12b6d1a1715cbced2e445ca353f9c9987b8636e2",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/81241f734f0f662378f5ffc53882b012923e6fe5",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/8cc569696dac51fc62bb39b3b8f530582b916d29",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/90e9eae1b5907fa36620ffb7f4f1a4afa9333427",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c1fa005cdf3b7ff14cdfd7d512830088a3fc256b",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ],
  "vulnStatus": "Received",
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: retry verity reads for not-uptodate Merkle folios\n\nbtrfs_read_merkle_tree_page() can find a folio in the mapping that is not\nuptodate.  After taking the folio lock, the current code treats that state\nas a read error and returns -EIO.\n\nThat can make a previous transient read failure sticky.  If the failed read\nleft a not-uptodate folio in the mapping, later callers find that folio and\nfail instead of retrying the read.\n\nKeep the existing page-cache insertion and locking order, but retry the\nMerkle item read when a not-uptodate folio is found in the mapping.  Also\nunlock the folio when read_key_bytes() fails so that a later caller can\nlock it and retry the read."
    }
  ],
  "lastModified": "2026-09-17T17:17:22.640",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}