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CVE-2025-40068— fs: ntfs3: Fix integer overflow in run_unpack()

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ntfs3文件系统中run_unpack函数未验证runlist数组值，可能导致整数溢出。

CVSS 8.4 · High EPSS 0.18% · P7

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 14

VendorProduct Version RangeStatus
Linux Linux 4342306f0f0d5ff4315a204d315c1b51b914fca5< f6b36cfd25cbadad63447c673743cf771090e756 affected
4342306f0f0d5ff4315a204d315c1b51b914fca5< 3ac37e100385b59ac821a62118494442238aaac4 affected
4342306f0f0d5ff4315a204d315c1b51b914fca5< a86c8b9d03f7101e1750233846fe989df6f0d631 affected
4342306f0f0d5ff4315a204d315c1b51b914fca5< 9378cfe228c2c679564a4116bcb28c8e89dff989 affected
4342306f0f0d5ff4315a204d315c1b51b914fca5< 5aa5799d162ad1b8e8b699d48b6218143c695a78 affected
4342306f0f0d5ff4315a204d315c1b51b914fca5< 736fc7bf5f68f6b74a0925b7e072c571838657d2 affected
5.15 affected
< 5.15 unaffected
… +6 more rows
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I. Basic Information for CVE-2025-40068

Vulnerability Information
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Vulnerability Title
fs: ntfs3: Fix integer overflow in run_unpack()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: fs: ntfs3: Fix integer overflow in run_unpack() The MFT record relative to the file being opened contains its runlist, an array containing information about the file's location on the physical disk. Analysis of all Call Stack paths showed that the values of the runlist array, from which LCNs are calculated, are not validated before run_unpack function. The run_unpack function decodes the compressed runlist data format from MFT attributes (for example, $DATA), converting them into a runs_tree structure, which describes the mapping of virtual clusters (VCN) to logical clusters (LCN). The NTFS3 subsystem also has a shortcut for deleting files from MFT records - in this case, the RUN_DEALLOCATE command is sent to the run_unpack input, and the function logic provides that all data transferred to the runlist about file or directory is deleted without creating a runs_tree structure. Substituting the runlist in the $DATA attribute of the MFT record for an arbitrary file can lead either to access to arbitrary data on the disk bypassing access checks to them (since the inode access check occurs above) or to destruction of arbitrary data on the disk. Add overflow check for addition operation. Found by Linux Verification Center (linuxtesting.org) with SVACE.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于ntfs3文件系统中run_unpack函数未验证runlist数组值，可能导致整数溢出。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 4342306f0f0d5ff4315a204d315c1b51b914fca5 ~ f6b36cfd25cbadad63447c673743cf771090e756 -
Linux Linux 5.15 -

II. Public POCs for CVE-2025-40068

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III. Intelligence Information for CVE-2025-40068

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Patches & Fixes for CVE-2025-40068 (1)

Same Patch Batch · Linux · 2025-10-28 · 58 CVEs total

CVE-2025-40074 9.8 CRITICAL ipv4: start using dst_dev_rcu()
CVE-2025-40043 8.8 HIGH net: nfc: nci: Add parameter validation for packet data
CVE-2025-40039 8.8 HIGH ksmbd: Fix race condition in RPC handle list access
CVE-2025-40058 8.8 HIGH iommu/vt-d: Disallow dirty tracking if incoherent page walk
CVE-2025-40046 8.6 HIGH io_uring/zcrx: fix overshooting recv limit
CVE-2025-40075 8.1 HIGH tcp_metrics: use dst_dev_net_rcu()
CVE-2025-40026 7.9 HIGH KVM: x86: Don't (re)check L1 intercepts when completing userspace I/O
CVE-2025-40081 7.8 HIGH perf: arm_spe: Prevent overflow in PERF_IDX2OFF()
CVE-2025-40064 7.8 HIGH smc: Fix use-after-free in __pnet_find_base_ndev().
CVE-2025-40067 7.8 HIGH fs/ntfs3: reject index allocation if $BITMAP is empty but blocks exist
CVE-2025-40069 7.8 HIGH drm/msm: Fix obj leak in VM_BIND error path
CVE-2025-40061 7.8 HIGH RDMA/rxe: Fix race in do_task() when draining
CVE-2025-40041 7.8 HIGH LoongArch: BPF: Sign-extend struct ops return values properly
CVE-2025-40027 7.8 HIGH net/9p: fix double req put in p9_fd_cancelled
CVE-2025-40025 7.8 HIGH f2fs: fix to do sanity check on node footer for non inode dnode
CVE-2025-40044 7.8 HIGH fs: udf: fix OOB read in lengthAllocDescs handling
CVE-2025-40045 7.8 HIGH ASoC: codecs: wcd937x: set the comp soundwire port correctly
CVE-2025-40051 7.8 HIGH vhost: vringh: Modify the return value check
CVE-2025-40047 7.8 HIGH io_uring/waitid: always prune wait queue entry in io_waitid_wait()
CVE-2025-40028 7.8 HIGH binder: fix double-free in dbitmap

Showing top 20 of 58 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-40068

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