Vulnerability-Lookup

CVE-2026-64432 (GCVE-0-2026-64432)

Vulnerability from cvelistv5 – Published: 2026-07-25 08:51 – Updated: 2026-07-25 08:51

Title

fs/ntfs3: validate Dirty Page Table capacity in log_replay copy_lcns

Summary

In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: validate Dirty Page Table capacity in log_replay copy_lcns In the analysis pass of $LogFile journal replay, log_replay() copies LCNs from each action log record into an existing Dirty Page Table (DPT) entry without bounding the destination index. A crafted NTFS image with DPT entry lcns_follow=1 and an action log record with lcns_follow=2 produces a kernel slab out-of-bounds write at mount time: BUG: KASAN: slab-out-of-bounds in log_replay+0x654c/0xdb60 Write of size 8 at addr ffff8880095e1040 by task mount Two attacker-controlled fields can drive j+i past the allocated page_lcns[] array: 1. dp->lcns_follow (capacity) can be smaller than lrh->lcns_follow. 2. lrh->target_vcn may be smaller than dp->vcn, making the u64 subtraction wrap to a huge size_t. Validate target VCN delta and per-record LCN count against the DPT entry capacity, bail via the existing out: cleanup label with -EINVAL. This mirrors the bounds-check pattern added in commit b2bc7c44ed17 ("fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot") and commit 0ca0485e4b2e ("fs/ntfs3: validate rec->used in journal-replay file record check").

Severity

No CVSS data available.

Assigner

Linux

References

7 references

URL	Tags
https://git.kernel.org/stable/c/964c3fae1dfc49dde…
https://git.kernel.org/stable/c/3aa96956ca2200674…
https://git.kernel.org/stable/c/946046841013ebac8…
https://git.kernel.org/stable/c/c6f9e804f73ef8095…
https://git.kernel.org/stable/c/cf28fc1658463d768…
https://git.kernel.org/stable/c/f433acc85b86f327d…
https://git.kernel.org/stable/c/57382ec6ac63b63dc…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: b46acd6a6a627d876898e1c84d3f84902264b445 , < 964c3fae1dfc49dde5468eace940f199cda234e9 (git) Affected: b46acd6a6a627d876898e1c84d3f84902264b445 , < 3aa96956ca2200674e2a8f9c23ec6ecd45e5010f (git) Affected: b46acd6a6a627d876898e1c84d3f84902264b445 , < 946046841013ebac8492ef49651c53638d7a9a6a (git) Affected: b46acd6a6a627d876898e1c84d3f84902264b445 , < c6f9e804f73ef809529865fbc7256dd189ff8c33 (git) Affected: b46acd6a6a627d876898e1c84d3f84902264b445 , < cf28fc1658463d768657cf1c27a83980d4ba7ef2 (git) Affected: b46acd6a6a627d876898e1c84d3f84902264b445 , < f433acc85b86f327d03ba8b03a33c105c51053de (git) Affected: b46acd6a6a627d876898e1c84d3f84902264b445 , < 57382ec6ac63b63dce2789e835fded28b698ae79 (git)
Linux	Linux	Affected: 5.15 Unaffected: 0 , < 5.15 (semver) Unaffected: 5.15.212 , ≤ 5.15.* (semver) Unaffected: 6.1.178 , ≤ 6.1.* (semver) Unaffected: 6.6.145 , ≤ 6.6.* (semver) Unaffected: 6.12.96 , ≤ 6.12.* (semver) Unaffected: 6.18.39 , ≤ 6.18.* (semver) Unaffected: 7.1.4 , ≤ 7.1.* (semver) Unaffected: 7.2-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

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    "datePublished": "2026-07-25T08:51:07.791Z",
    "dateReserved": "2026-07-19T15:36:31.787Z",
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A crafted NTFS\\nimage with DPT entry lcns_follow=1 and an action log record with\\nlcns_follow=2 produces a kernel slab out-of-bounds write at mount\\ntime:\\n\\n  BUG: KASAN: slab-out-of-bounds in log_replay+0x654c/0xdb60\\n  Write of size 8 at addr ffff8880095e1040 by task mount\\n\\nTwo attacker-controlled fields can drive j+i past the allocated\\npage_lcns[] array:\\n\\n  1. dp-\u003elcns_follow (capacity) can be smaller than lrh-\u003elcns_follow.\\n  2. lrh-\u003etarget_vcn may be smaller than dp-\u003evcn, making the u64\\n     subtraction wrap to a huge size_t.\\n\\nValidate target VCN delta and per-record LCN count against the\\nDPT entry capacity, bail via the existing out: cleanup label with\\n-EINVAL.\\n\\nThis mirrors the bounds-check pattern added in commit b2bc7c44ed17\\n(\\\"fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot\\\")\\nand commit 0ca0485e4b2e (\\\"fs/ntfs3: validate rec-\u003eused in\\njournal-replay file record check\\\").\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"fs/ntfs3/fslog.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"b46acd6a6a627d876898e1c84d3f84902264b445\",\"lessThan\":\"964c3fae1dfc49dde5468eace940f199cda234e9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b46acd6a6a627d876898e1c84d3f84902264b445\",\"lessThan\":\"3aa96956ca2200674e2a8f9c23ec6ecd45e5010f\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b46acd6a6a627d876898e1c84d3f84902264b445\",\"lessThan\":\"946046841013ebac8492ef49651c53638d7a9a6a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b46acd6a6a627d876898e1c84d3f84902264b445\",\"lessThan\":\"c6f9e804f73ef809529865fbc7256dd189ff8c33\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b46acd6a6a627d876898e1c84d3f84902264b445\",\"lessThan\":\"cf28fc1658463d768657cf1c27a83980d4ba7ef2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b46acd6a6a627d876898e1c84d3f84902264b445\",\"lessThan\":\"f433acc85b86f327d03ba8b03a33c105c51053de\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b46acd6a6a627d876898e1c84d3f84902264b445\",\"lessThan\":\"57382ec6ac63b63dce2789e835fded28b698ae79\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"fs/ntfs3/fslog.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.15\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.15\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.212\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.178\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.96\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.39\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.4\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/3aa96956ca2200674e2a8f9c23ec6ecd45e5010f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/57382ec6ac63b63dce2789e835fded28b698ae79\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/946046841013ebac8492ef49651c53638d7a9a6a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/964c3fae1dfc49dde5468eace940f199cda234e9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c6f9e804f73ef809529865fbc7256dd189ff8c33\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cf28fc1658463d768657cf1c27a83980d4ba7ef2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f433acc85b86f327d03ba8b03a33c105c51053de\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-07-25T15:59:27Z",
      "cve": "CVE-2026-64432",
      "id": "CVE-2026-64432",
      "initial_release_date": "2026-07-25T15:59:27Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64432",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64432.json",
      "version": "2"
    }
  }
}

GHSA-4XG7-26QR-MCCF

Vulnerability from github – Published: 2026-07-25 12:31 – Updated: 2026-07-25 12:31

Details

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

fs/ntfs3: validate Dirty Page Table capacity in log_replay copy_lcns

In the analysis pass of $LogFile journal replay, log_replay() copies LCNs from each action log record into an existing Dirty Page Table (DPT) entry without bounding the destination index. A crafted NTFS image with DPT entry lcns_follow=1 and an action log record with lcns_follow=2 produces a kernel slab out-of-bounds write at mount time:

BUG: KASAN: slab-out-of-bounds in log_replay+0x654c/0xdb60 Write of size 8 at addr ffff8880095e1040 by task mount

Two attacker-controlled fields can drive j+i past the allocated page_lcns[] array:

dp->lcns_follow (capacity) can be smaller than lrh->lcns_follow.
lrh->target_vcn may be smaller than dp->vcn, making the u64 subtraction wrap to a huge size_t.

Validate target VCN delta and per-record LCN count against the DPT entry capacity, bail via the existing out: cleanup label with -EINVAL.

This mirrors the bounds-check pattern added in commit b2bc7c44ed17 ("fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot") and commit 0ca0485e4b2e ("fs/ntfs3: validate rec->used in journal-replay file record check").

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-64432"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-07-25T10:17:27Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nfs/ntfs3: validate Dirty Page Table capacity in log_replay copy_lcns\n\nIn the analysis pass of $LogFile journal replay, log_replay() copies\nLCNs from each action log record into an existing Dirty Page Table\n(DPT) entry without bounding the destination index. A crafted NTFS\nimage with DPT entry lcns_follow=1 and an action log record with\nlcns_follow=2 produces a kernel slab out-of-bounds write at mount\ntime:\n\n  BUG: KASAN: slab-out-of-bounds in log_replay+0x654c/0xdb60\n  Write of size 8 at addr ffff8880095e1040 by task mount\n\nTwo attacker-controlled fields can drive j+i past the allocated\npage_lcns[] array:\n\n  1. dp-\u003elcns_follow (capacity) can be smaller than lrh-\u003elcns_follow.\n  2. lrh-\u003etarget_vcn may be smaller than dp-\u003evcn, making the u64\n     subtraction wrap to a huge size_t.\n\nValidate target VCN delta and per-record LCN count against the\nDPT entry capacity, bail via the existing out: cleanup label with\n-EINVAL.\n\nThis mirrors the bounds-check pattern added in commit b2bc7c44ed17\n(\"fs/ntfs3: Fix slab-out-of-bounds read in DeleteIndexEntryRoot\")\nand commit 0ca0485e4b2e (\"fs/ntfs3: validate rec-\u003eused in\njournal-replay file record check\").",
  "id": "GHSA-4xg7-26qr-mccf",
  "modified": "2026-07-25T12:31:35Z",
  "published": "2026-07-25T12:31:35Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-64432"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/3aa96956ca2200674e2a8f9c23ec6ecd45e5010f"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/57382ec6ac63b63dce2789e835fded28b698ae79"
    },
    {
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      "url": "https://git.kernel.org/stable/c/946046841013ebac8492ef49651c53638d7a9a6a"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/964c3fae1dfc49dde5468eace940f199cda234e9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/c6f9e804f73ef809529865fbc7256dd189ff8c33"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/cf28fc1658463d768657cf1c27a83980d4ba7ef2"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f433acc85b86f327d03ba8b03a33c105c51053de"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.

Action not permitted

CVE-2026-64432 (GCVE-0-2026-64432)

GHSA-4XG7-26QR-MCCF

Tags

Sightings

Nomenclature