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Review reviewHigh

CVE-2026-64432

Linux

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 at...

CVSS
7.8
EPSS
-
- percentile
CISA KEV
Not listed
Published
2026.07.25
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability-
Technical severityCVSS 7.8

Vulnerability overview

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 at...

Affected product and versions

Product
Linux
Affected versions
>= b46acd6a6a627d876898e1c84d3f84902264b445 < 964c3fae1dfc49dde5468eace940f199cda234e9, >= b46acd6a6a627d876898e1c84d3f84902264b445 < 3aa96956ca2200674e2a8f9c23ec6ecd45e5010f, >= b46acd6a6a627d876898e1c84d3f84902264b445 < 946046841013ebac8492ef49651c53638d7a9a6a, >= b46acd6a6a627d876898e1c84d3f84902264b445 < c6f9e804f73ef809529865fbc7256dd189ff8c33, >= b46acd6a6a627d876898e1c84d3f84902264b445 < cf28fc1658463d768657cf1c27a83980d4ba7ef2, >= b46acd6a6a627d876898e1c84d3f84902264b445 < f433acc85b86f327d03ba8b03a33c105c51053de, >= b46acd6a6a627d876898e1c84d3f84902264b445 < 57382ec6ac63b63dce2789e835fded28b698ae79, >= 5.15
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
Not available