CVE-2026-64217 (GCVE-0-2026-64217)

Vulnerability from cvelistv5 – Published: 2026-07-24 15:23 – Updated: 2026-07-27 04:58
VLAI
Title
netfs: Fix overrun check in netfs_extract_user_iter()
Summary
In the Linux kernel, the following vulnerability has been resolved: netfs: Fix overrun check in netfs_extract_user_iter() Fix netfs_extract_user_iter() so that if iov_iter_extract_pages() overfills pages[], then those pages don't get included in the iterator constructed at the end of the function. If there was an overfill, memory corruption has already happened.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 85dd2c8ff368b1446be9febde84afe1d7aec4261 , < 00efe58bbdcc93272d579ca24bfc912563f4a204 (git)
Affected: 85dd2c8ff368b1446be9febde84afe1d7aec4261 , < 96cc3beb2390ba9f9c128c5733c0ccfe450dd4f9 (git)
Affected: 85dd2c8ff368b1446be9febde84afe1d7aec4261 , < afeb32d9bf9aaeea51d0f723a19f14afb73bd94d (git)
Affected: 85dd2c8ff368b1446be9febde84afe1d7aec4261 , < f48b9157f0f611fa436c360648603d5ded719b12 (git)
Affected: 85dd2c8ff368b1446be9febde84afe1d7aec4261 , < 0ef37eef83fad3542ee06db2940433ae1a92b39d (git)
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Linux Linux Affected: 6.3
Unaffected: 0 , < 6.3 (semver)
Unaffected: 6.6.142 , ≤ 6.6.* (semver)
Unaffected: 6.12.92 , ≤ 6.12.* (semver)
Unaffected: 6.18.34 , ≤ 6.18.* (semver)
Unaffected: 7.0.11 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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{
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          "programFiles": [
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    "datePublished": "2026-07-24T15:23:05.261Z",
    "dateReserved": "2026-07-19T15:36:31.770Z",
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    "redhat_vex": {
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      "cve": "CVE-2026-64217",
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      "product_status:known_affected": "76",
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      "cve": "CVE-2026-64217",
      "id": "CVE-2026-64217",
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      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64217",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64217.json",
      "version": "5"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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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.