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fs/ntfs3: bound page_lcns[] index by the log record

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: bound page_lcns[] index by the log record The copy_lcns loop and the redo shorten loop index page_lcns[] at j + i, where i runs up to the log record's lcns_follow. That count is checked only against the record's own length, not the target entry, so check_dp_table() (which validates the entry's lcns_follow) does not cover it: the copy_lcns entry may even be freshly allocated after that check, and find_dp() bounds j but not i. A crafted record thus overflows page_lcns[] of an otherwise valid entry. Add dp_range_ok() and reject, before each loop, any record whose run does not fit the entry. These are the only two page_lcns[] accesses indexed by the record rather than the entry, so together with the entry validation every access is now bounded. [almaz.alexandrovich@paragon-software.com: original patch contained changes to the problem already handled, applied partly]

Announced Source revision 1
Original source ↗

CVE-2026-89615

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-89615

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
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Prerequisites
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Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "b46acd6a6a627d876898e1c84d3f84902264b445",
        "lessThan": "31fdd11f75da9823500168cecb07aa45130915a3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b46acd6a6a627d876898e1c84d3f84902264b445",
        "lessThan": "bb742d1030864c0fe140666f639428ba4e90b2ca",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b46acd6a6a627d876898e1c84d3f84902264b445",
        "lessThan": "61ca8cbbf68f77f25b699ed4358bd232f94ed43b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b46acd6a6a627d876898e1c84d3f84902264b445",
        "lessThan": "f4c1bc6d7331f344ffcea93c2a37badcbe15baa6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b46acd6a6a627d876898e1c84d3f84902264b445",
        "lessThan": "7ccb94901f38a062034b56b43c774050b113758f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "b46acd6a6a627d876898e1c84d3f84902264b445",
        "lessThan": "1135ebc225996b3ac1a295652b19a0a706737a6c",
        "versionType": "git"
      },
      {
        "status": "affected",
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        "lessThan": "6f7b9dbdc1b7520206abce0049bdd143eb536e75",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "fs/ntfs3/fslog.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.15"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.15",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.109",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.50",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.4",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "fs/ntfs3/fslog.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-89615

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#35122 · Revision 1
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Publisher date
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