CVE-2025-40351 - Vulnerability Details

- hfsplus: fix KMSAN uninit-value issue in hfsplus_delete_cat()

Description

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

hfsplus: fix KMSAN uninit-value issue in hfsplus_delete_cat()

The syzbot reported issue in hfsplus_delete_cat():

[ 70.682285][ T9333] =====================================================
[ 70.682943][ T9333] BUG: KMSAN: uninit-value in hfsplus_subfolders_dec+0x1d7/0x220
[ 70.683640][ T9333] hfsplus_subfolders_dec+0x1d7/0x220
[ 70.684141][ T9333] hfsplus_delete_cat+0x105d/0x12b0
[ 70.684621][ T9333] hfsplus_rmdir+0x13d/0x310
[ 70.685048][ T9333] vfs_rmdir+0x5ba/0x810
[ 70.685447][ T9333] do_rmdir+0x964/0xea0
[ 70.685833][ T9333] __x64_sys_rmdir+0x71/0xb0
[ 70.686260][ T9333] x64_sys_call+0xcd8/0x3cf0
[ 70.686695][ T9333] do_syscall_64+0xd9/0x1d0
[ 70.687119][ T9333] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 70.687646][ T9333]
[ 70.687856][ T9333] Uninit was stored to memory at:
[ 70.688311][ T9333] hfsplus_subfolders_inc+0x1c2/0x1d0
[ 70.688779][ T9333] hfsplus_create_cat+0x148e/0x1800
[ 70.689231][ T9333] hfsplus_mknod+0x27f/0x600
[ 70.689730][ T9333] hfsplus_mkdir+0x5a/0x70
[ 70.690146][ T9333] vfs_mkdir+0x483/0x7a0
[ 70.690545][ T9333] do_mkdirat+0x3f2/0xd30
[ 70.690944][ T9333] __x64_sys_mkdir+0x9a/0xf0
[ 70.691380][ T9333] x64_sys_call+0x2f89/0x3cf0
[ 70.691816][ T9333] do_syscall_64+0xd9/0x1d0
[ 70.692229][ T9333] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 70.692773][ T9333]
[ 70.692990][ T9333] Uninit was stored to memory at:
[ 70.693469][ T9333] hfsplus_subfolders_inc+0x1c2/0x1d0
[ 70.693960][ T9333] hfsplus_create_cat+0x148e/0x1800
[ 70.694438][ T9333] hfsplus_fill_super+0x21c1/0x2700
[ 70.694911][ T9333] mount_bdev+0x37b/0x530
[ 70.695320][ T9333] hfsplus_mount+0x4d/0x60
[ 70.695729][ T9333] legacy_get_tree+0x113/0x2c0
[ 70.696167][ T9333] vfs_get_tree+0xb3/0x5c0
[ 70.696588][ T9333] do_new_mount+0x73e/0x1630
[ 70.697013][ T9333] path_mount+0x6e3/0x1eb0
[ 70.697425][ T9333] __se_sys_mount+0x733/0x830
[ 70.697857][ T9333] __x64_sys_mount+0xe4/0x150
[ 70.698269][ T9333] x64_sys_call+0x2691/0x3cf0
[ 70.698704][ T9333] do_syscall_64+0xd9/0x1d0
[ 70.699117][ T9333] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 70.699730][ T9333]
[ 70.699946][ T9333] Uninit was created at:
[ 70.700378][ T9333] __alloc_pages_noprof+0x714/0xe60
[ 70.700843][ T9333] alloc_pages_mpol_noprof+0x2a2/0x9b0
[ 70.701331][ T9333] alloc_pages_noprof+0xf8/0x1f0
[ 70.701774][ T9333] allocate_slab+0x30e/0x1390
[ 70.702194][ T9333] ___slab_alloc+0x1049/0x33a0
[ 70.702635][ T9333] kmem_cache_alloc_lru_noprof+0x5ce/0xb20
[ 70.703153][ T9333] hfsplus_alloc_inode+0x5a/0xd0
[ 70.703598][ T9333] alloc_inode+0x82/0x490
[ 70.703984][ T9333] iget_locked+0x22e/0x1320
[ 70.704428][ T9333] hfsplus_iget+0x5c/0xba0
[ 70.704827][ T9333] hfsplus_btree_open+0x135/0x1dd0
[ 70.705291][ T9333] hfsplus_fill_super+0x1132/0x2700
[ 70.705776][ T9333] mount_bdev+0x37b/0x530
[ 70.706171][ T9333] hfsplus_mount+0x4d/0x60
[ 70.706579][ T9333] legacy_get_tree+0x113/0x2c0
[ 70.707019][ T9333] vfs_get_tree+0xb3/0x5c0
[ 70.707444][ T9333] do_new_mount+0x73e/0x1630
[ 70.707865][ T9333] path_mount+0x6e3/0x1eb0
[ 70.708270][ T9333] __se_sys_mount+0x733/0x830
[ 70.708711][ T9333] __x64_sys_mount+0xe4/0x150
[ 70.709158][ T9333] x64_sys_call+0x2691/0x3cf0
[ 70.709630][ T9333] do_syscall_64+0xd9/0x1d0
[ 70.710053][ T9333] entry_SYSCALL_64_after_hwframe+0x77/0x7f
[ 70.710611][ T9333]
[ 70.710842][ T9333] CPU: 3 UID: 0 PID: 9333 Comm: repro Not tainted 6.12.0-rc6-dirty #17
[ 70.711568][ T9333] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
[ 70.712490][ T9333] =====================================================
[ 70.713085][ T9333] Disabling lock debugging due to kernel taint
[ 70.713618][ T9333] Kernel panic - not syncing: kmsan.panic set ...
[ 70.714159][ T9333]
---truncated---

Published: 2025-12-16

Score: 5.5 Medium

EPSS: < 1% Very Low

KEV: No

Impact:

Action:

Analysis

Analysis and contextual insights are available on OpenCVE Cloud.

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Linux

unaffected

Version	Status	Constraints
`d7d673a591701f131e53d4fd4e2b9352f1316642`	affected	< a2bee43b451615531ae6f3cf45054f02915ef885
`d7d673a591701f131e53d4fd4e2b9352f1316642`	affected	< b07630afe1671096dc64064190cae3b6165cf6e4
`d7d673a591701f131e53d4fd4e2b9352f1316642`	affected	< 9df3c241fbf69edce968b20eeeeb3f6da34af041
`d7d673a591701f131e53d4fd4e2b9352f1316642`	affected	< 1b9e5ade272f8be6421c9eea4c4f6810180017f9
`d7d673a591701f131e53d4fd4e2b9352f1316642`	affected	< 2bb8bc99b1a7a46d83f95c46f530305f6df84eaf
`d7d673a591701f131e53d4fd4e2b9352f1316642`	affected	< 295527bfdefd5bf31ec8218e2891a65777141d05
`d7d673a591701f131e53d4fd4e2b9352f1316642`	affected	< 4891bf2b09c313622a6e07d7f108aa5e123c768d
`d7d673a591701f131e53d4fd4e2b9352f1316642`	affected	< 9b3d15a758910bb98ba8feb4109d99cc67450ee4

Linux

affected

Version	Status	Constraints
`3.14`	affected	—
`0`	unaffected	< 3.14
`5.4.301`	unaffected	≤ 5.4.*
`5.10.246`	unaffected	≤ 5.10.*
`5.15.196`	unaffected	≤ 5.15.*
`6.1.158`	unaffected	≤ 6.1.*
`6.6.115`	unaffected	≤ 6.6.*
`6.12.56`	unaffected	≤ 6.12.*
`6.17.6`	unaffected	≤ 6.17.*
`6.18`	unaffected	≤ *

No data.

No data available yet.

Remediation

No vendor fix or workaround currently provided.

Additional remediation guidance may be available on OpenCVE Cloud.

Tracking

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Advisories

Source	ID	Title
Ubuntu USN	USN-8029-1	Linux kernel vulnerabilities
Ubuntu USN	USN-8030-1	Linux kernel (GCP) vulnerabilities
Ubuntu USN	USN-8033-1	Linux kernel vulnerabilities
Ubuntu USN	USN-8033-2	Linux kernel vulnerabilities
Ubuntu USN	USN-8033-3	Linux kernel (FIPS) vulnerabilities
Ubuntu USN	USN-8034-1	Linux kernel (NVIDIA Tegra) vulnerabilities
Ubuntu USN	USN-8033-4	Linux kernel (AWS) vulnerabilities
Ubuntu USN	USN-8029-2	Linux kernel vulnerabilities
Ubuntu USN	USN-8033-5	Linux kernel vulnerabilities
Ubuntu USN	USN-8034-2	Linux kernel (NVIDIA Tegra IGX) vulnerabilities
Ubuntu USN	USN-8048-1	Linux kernel (OEM) vulnerabilities
Ubuntu USN	USN-8033-6	Linux kernel (NVIDIA) vulnerabilities
Ubuntu USN	USN-8033-7	Linux kernel vulnerabilities
Ubuntu USN	USN-8033-8	Linux kernel (Intel IoTG) vulnerabilities
Ubuntu USN	USN-8029-3	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-8095-1	Linux kernel vulnerabilities
Ubuntu USN	USN-8095-2	Linux kernel (FIPS) vulnerabilities
Ubuntu USN	USN-8100-1	Linux kernel (NVIDIA) vulnerabilities
Ubuntu USN	USN-8095-3	Linux kernel (Real-time) vulnerabilities
Ubuntu USN	USN-8095-4	Linux kernel (AWS) vulnerabilities
Ubuntu USN	USN-8125-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-8126-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-8095-5	Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN	USN-8141-1	Linux kernel (Raspberry Pi) vulnerabilities
Ubuntu USN	USN-8163-1	Linux kernel (Azure FIPS) vulnerabilities
Ubuntu USN	USN-8165-1	Linux kernel (Azure FIPS) vulnerabilities
Ubuntu USN	USN-8163-2	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-8243-1	Linux kernel (Azure) vulnerabilities
Ubuntu USN	USN-8261-1	Linux kernel (Xilinx) vulnerabilities

No CVSS v4.0

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00029.

Key SSVC decision points have not yet been added.

References

Link	Providers
https://git.kernel.org/stable/c/1b9e5ade272f8be6421c9eea4c4f6810180017f9
https://git.kernel.org/stable/c/295527bfdefd5bf31ec8218e2891a65777141d05
https://git.kernel.org/stable/c/2bb8bc99b1a7a46d83f95c46f530305f6df84eaf
https://git.kernel.org/stable/c/4891bf2b09c313622a6e07d7f108aa5e123c768d
https://git.kernel.org/stable/c/9b3d15a758910bb98ba8feb4109d99cc67450ee4
https://git.kernel.org/stable/c/9df3c241fbf69edce968b20eeeeb3f6da34af041
https://git.kernel.org/stable/c/a2bee43b451615531ae6f3cf45054f02915ef885
https://git.kernel.org/stable/c/b07630afe1671096dc64064190cae3b6165cf6e4
https://lore.kernel.org/linux-cve-announce/2025121636-CVE-2025-40351-55f8@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2025-40351
https://www.cve.org/CVERecord?id=CVE-2025-40351

History

Wed, 17 Dec 2025 12:15:00 +0000

Type	Values Removed	Values Added
References		https://lore.kernel.org/linux-cve-announce/2025121636-CVE-2025-40351-55f8@gregkh/T https://nvd.nist.gov/vuln/detail/CVE-2025-40351 https://www.cve.org/CVERecord?id=CVE-2025-40351
Metrics	threat_severity `None`	cvssV3_1 `{'score': 5.5, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}` threat_severity `Low`

Tue, 16 Dec 2025 13:45:00 +0000

Type	Values Removed	Values Added
Description		In the Linux kernel, the following vulnerability has been resolved: hfsplus: fix KMSAN uninit-value issue in hfsplus_delete_cat() The syzbot reported issue in hfsplus_delete_cat(): [ 70.682285][ T9333] ===================================================== [ 70.682943][ T9333] BUG: KMSAN: uninit-value in hfsplus_subfolders_dec+0x1d7/0x220 [ 70.683640][ T9333] hfsplus_subfolders_dec+0x1d7/0x220 [ 70.684141][ T9333] hfsplus_delete_cat+0x105d/0x12b0 [ 70.684621][ T9333] hfsplus_rmdir+0x13d/0x310 [ 70.685048][ T9333] vfs_rmdir+0x5ba/0x810 [ 70.685447][ T9333] do_rmdir+0x964/0xea0 [ 70.685833][ T9333] __x64_sys_rmdir+0x71/0xb0 [ 70.686260][ T9333] x64_sys_call+0xcd8/0x3cf0 [ 70.686695][ T9333] do_syscall_64+0xd9/0x1d0 [ 70.687119][ T9333] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 70.687646][ T9333] [ 70.687856][ T9333] Uninit was stored to memory at: [ 70.688311][ T9333] hfsplus_subfolders_inc+0x1c2/0x1d0 [ 70.688779][ T9333] hfsplus_create_cat+0x148e/0x1800 [ 70.689231][ T9333] hfsplus_mknod+0x27f/0x600 [ 70.689730][ T9333] hfsplus_mkdir+0x5a/0x70 [ 70.690146][ T9333] vfs_mkdir+0x483/0x7a0 [ 70.690545][ T9333] do_mkdirat+0x3f2/0xd30 [ 70.690944][ T9333] __x64_sys_mkdir+0x9a/0xf0 [ 70.691380][ T9333] x64_sys_call+0x2f89/0x3cf0 [ 70.691816][ T9333] do_syscall_64+0xd9/0x1d0 [ 70.692229][ T9333] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 70.692773][ T9333] [ 70.692990][ T9333] Uninit was stored to memory at: [ 70.693469][ T9333] hfsplus_subfolders_inc+0x1c2/0x1d0 [ 70.693960][ T9333] hfsplus_create_cat+0x148e/0x1800 [ 70.694438][ T9333] hfsplus_fill_super+0x21c1/0x2700 [ 70.694911][ T9333] mount_bdev+0x37b/0x530 [ 70.695320][ T9333] hfsplus_mount+0x4d/0x60 [ 70.695729][ T9333] legacy_get_tree+0x113/0x2c0 [ 70.696167][ T9333] vfs_get_tree+0xb3/0x5c0 [ 70.696588][ T9333] do_new_mount+0x73e/0x1630 [ 70.697013][ T9333] path_mount+0x6e3/0x1eb0 [ 70.697425][ T9333] __se_sys_mount+0x733/0x830 [ 70.697857][ T9333] __x64_sys_mount+0xe4/0x150 [ 70.698269][ T9333] x64_sys_call+0x2691/0x3cf0 [ 70.698704][ T9333] do_syscall_64+0xd9/0x1d0 [ 70.699117][ T9333] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 70.699730][ T9333] [ 70.699946][ T9333] Uninit was created at: [ 70.700378][ T9333] __alloc_pages_noprof+0x714/0xe60 [ 70.700843][ T9333] alloc_pages_mpol_noprof+0x2a2/0x9b0 [ 70.701331][ T9333] alloc_pages_noprof+0xf8/0x1f0 [ 70.701774][ T9333] allocate_slab+0x30e/0x1390 [ 70.702194][ T9333] ___slab_alloc+0x1049/0x33a0 [ 70.702635][ T9333] kmem_cache_alloc_lru_noprof+0x5ce/0xb20 [ 70.703153][ T9333] hfsplus_alloc_inode+0x5a/0xd0 [ 70.703598][ T9333] alloc_inode+0x82/0x490 [ 70.703984][ T9333] iget_locked+0x22e/0x1320 [ 70.704428][ T9333] hfsplus_iget+0x5c/0xba0 [ 70.704827][ T9333] hfsplus_btree_open+0x135/0x1dd0 [ 70.705291][ T9333] hfsplus_fill_super+0x1132/0x2700 [ 70.705776][ T9333] mount_bdev+0x37b/0x530 [ 70.706171][ T9333] hfsplus_mount+0x4d/0x60 [ 70.706579][ T9333] legacy_get_tree+0x113/0x2c0 [ 70.707019][ T9333] vfs_get_tree+0xb3/0x5c0 [ 70.707444][ T9333] do_new_mount+0x73e/0x1630 [ 70.707865][ T9333] path_mount+0x6e3/0x1eb0 [ 70.708270][ T9333] __se_sys_mount+0x733/0x830 [ 70.708711][ T9333] __x64_sys_mount+0xe4/0x150 [ 70.709158][ T9333] x64_sys_call+0x2691/0x3cf0 [ 70.709630][ T9333] do_syscall_64+0xd9/0x1d0 [ 70.710053][ T9333] entry_SYSCALL_64_after_hwframe+0x77/0x7f [ 70.710611][ T9333] [ 70.710842][ T9333] CPU: 3 UID: 0 PID: 9333 Comm: repro Not tainted 6.12.0-rc6-dirty #17 [ 70.711568][ T9333] Hardware name: QEMU Ubuntu 24.04 PC (i440FX + PIIX, 1996), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 [ 70.712490][ T9333] ===================================================== [ 70.713085][ T9333] Disabling lock debugging due to kernel taint [ 70.713618][ T9333] Kernel panic - not syncing: kmsan.panic set ... [ 70.714159][ T9333] ---truncated---
Title		hfsplus: fix KMSAN uninit-value issue in hfsplus_delete_cat()
First Time appeared		Linux Linux linux Kernel
CPEs		cpe:2.3:o:linux:linux_kernel::::::::
Vendors & Products		Linux Linux linux Kernel
References		https://git.kernel.org/stable/c/1b9e5ade272f8be6421c9eea4c4f6810180017f9 https://git.kernel.org/stable/c/295527bfdefd5bf31ec8218e2891a65777141d05 https://git.kernel.org/stable/c/2bb8bc99b1a7a46d83f95c46f530305f6df84eaf https://git.kernel.org/stable/c/4891bf2b09c313622a6e07d7f108aa5e123c768d https://git.kernel.org/stable/c/9b3d15a758910bb98ba8feb4109d99cc67450ee4 https://git.kernel.org/stable/c/9df3c241fbf69edce968b20eeeeb3f6da34af041 https://git.kernel.org/stable/c/a2bee43b451615531ae6f3cf45054f02915ef885 https://git.kernel.org/stable/c/b07630afe1671096dc64064190cae3b6165cf6e4

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Linux Linux Kernel

MITRE

Status: PUBLISHED

Assigner: Linux

Published: 2025-12-16T13:30:24.764Z

Updated: 2026-05-11T21:47:41.349Z

Reserved: 2025-04-16T07:20:57.187Z

Link: CVE-2025-40351

Vulnrichment

No data.

NVD

Status : Deferred

Published: 2025-12-16T14:15:46.953

Modified: 2026-04-15T00:35:42.020

Link: CVE-2025-40351

Redhat

Severity : Low

Publid Date: 2025-12-16T00:00:00Z

Links: CVE-2025-40351 - Bugzilla

OpenCVE Enrichment

No data.

Weaknesses

No weakness.

Tracking

Attack Vector Local

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

Subscriptions

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