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CVE-2025-39868— erofs: fix runtime warning on truncate_folio_batch_exceptionals()

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，该漏洞源于未正确移除DAX条目，可能导致运行时警告。

CVSS 7.8 · High EPSS 0.15% · P4

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux bde708f1a65d025c45575bfe1e7bf7bdf7e71e87< 91c34cd6ca1bc67ccf2d104834956af56b5893de affected
bde708f1a65d025c45575bfe1e7bf7bdf7e71e87< 181993bb0d626cf88cc803f4356ce5c5abe86278 affected
6.15 affected
< 6.15 unaffected
6.16.8≤ 6.16.* unaffected
6.17≤ * unaffected
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I. Basic Information for CVE-2025-39868

Vulnerability Information
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Vulnerability Title
erofs: fix runtime warning on truncate_folio_batch_exceptionals()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: erofs: fix runtime warning on truncate_folio_batch_exceptionals() Commit 0e2f80afcfa6("fs/dax: ensure all pages are idle prior to filesystem unmount") introduced the WARN_ON_ONCE to capture whether the filesystem has removed all DAX entries or not and applied the fix to xfs and ext4. Apply the missed fix on erofs to fix the runtime warning: [ 5.266254] ------------[ cut here ]------------ [ 5.266274] WARNING: CPU: 6 PID: 3109 at mm/truncate.c:89 truncate_folio_batch_exceptionals+0xff/0x260 [ 5.266294] Modules linked in: [ 5.266999] CPU: 6 UID: 0 PID: 3109 Comm: umount Tainted: G S 6.16.0+ #6 PREEMPT(voluntary) [ 5.267012] Tainted: [S]=CPU_OUT_OF_SPEC [ 5.267017] Hardware name: Dell Inc. OptiPlex 5000/05WXFV, BIOS 1.5.1 08/24/2022 [ 5.267024] RIP: 0010:truncate_folio_batch_exceptionals+0xff/0x260 [ 5.267076] Code: 00 00 41 39 df 7f 11 eb 78 83 c3 01 49 83 c4 08 41 39 df 74 6c 48 63 f3 48 83 fe 1f 0f 83 3c 01 00 00 43 f6 44 26 08 01 74 df <0f> 0b 4a 8b 34 22 4c 89 ef 48 89 55 90 e8 ff 54 1f 00 48 8b 55 90 [ 5.267083] RSP: 0018:ffffc900013f36c8 EFLAGS: 00010202 [ 5.267095] RAX: 0000000000000000 RBX: 0000000000000000 RCX: 0000000000000000 [ 5.267101] RDX: ffffc900013f3790 RSI: 0000000000000000 RDI: ffff8882a1407898 [ 5.267108] RBP: ffffc900013f3740 R08: 0000000000000000 R09: 0000000000000000 [ 5.267113] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [ 5.267119] R13: ffff8882a1407ab8 R14: ffffc900013f3888 R15: 0000000000000001 [ 5.267125] FS: 00007aaa8b437800(0000) GS:ffff88850025b000(0000) knlGS:0000000000000000 [ 5.267132] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [ 5.267138] CR2: 00007aaa8b3aac10 CR3: 000000024f764000 CR4: 0000000000f52ef0 [ 5.267144] PKRU: 55555554 [ 5.267150] Call Trace: [ 5.267154] <TASK> [ 5.267181] truncate_inode_pages_range+0x118/0x5e0 [ 5.267193] ? save_trace+0x54/0x390 [ 5.267296] truncate_inode_pages_final+0x43/0x60 [ 5.267309] evict+0x2a4/0x2c0 [ 5.267339] dispose_list+0x39/0x80 [ 5.267352] evict_inodes+0x150/0x1b0 [ 5.267376] generic_shutdown_super+0x41/0x180 [ 5.267390] kill_block_super+0x1b/0x50 [ 5.267402] erofs_kill_sb+0x81/0x90 [erofs] [ 5.267436] deactivate_locked_super+0x32/0xb0 [ 5.267450] deactivate_super+0x46/0x60 [ 5.267460] cleanup_mnt+0xc3/0x170 [ 5.267475] __cleanup_mnt+0x12/0x20 [ 5.267485] task_work_run+0x5d/0xb0 [ 5.267499] exit_to_user_mode_loop+0x144/0x170 [ 5.267512] do_syscall_64+0x2b9/0x7c0 [ 5.267523] ? __lock_acquire+0x665/0x2ce0 [ 5.267535] ? __lock_acquire+0x665/0x2ce0 [ 5.267560] ? lock_acquire+0xcd/0x300 [ 5.267573] ? find_held_lock+0x31/0x90 [ 5.267582] ? mntput_no_expire+0x97/0x4e0 [ 5.267606] ? mntput_no_expire+0xa1/0x4e0 [ 5.267625] ? mntput+0x24/0x50 [ 5.267634] ? path_put+0x1e/0x30 [ 5.267647] ? do_faccessat+0x120/0x2f0 [ 5.267677] ? do_syscall_64+0x1a2/0x7c0 [ 5.267686] ? from_kgid_munged+0x17/0x30 [ 5.267703] ? from_kuid_munged+0x13/0x30 [ 5.267711] ? __do_sys_getuid+0x3d/0x50 [ 5.267724] ? do_syscall_64+0x1a2/0x7c0 [ 5.267732] ? irqentry_exit+0x77/0xb0 [ 5.267743] ? clear_bhb_loop+0x30/0x80 [ 5.267752] ? clear_bhb_loop+0x30/0x80 [ 5.267765] entry_SYSCALL_64_after_hwframe+0x76/0x7e [ 5.267772] RIP: 0033:0x7aaa8b32a9fb [ 5.267781] Code: c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 f3 0f 1e fa 31 f6 e9 05 00 00 00 0f 1f 44 00 00 f3 0f 1e fa b8 a6 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 c3 0f 1f 40 00 48 8b 15 e9 83 0d 00 f7 d8 [ 5.267787] RSP: 002b:00007ffd7c4c9468 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 [ 5.267796] RAX: 0000000000000000 RBX: 00005a61592a8b00 RCX: 00007aaa8b32a9fb [ 5.267802] RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00005a61592b2080 [ 5.267806] RBP: 00007ffd7c4c9540 R08: 00007aaa8b403b20 R09: 0000000000000020 [ 5.267812] R10: 0000000000000001 R11: 0000000000000246 R12: 00005a61592a8c00 [ 5.267817] R13: 00000000 ---truncated---
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/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，该漏洞源于未正确移除DAX条目，可能导致运行时警告。
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 bde708f1a65d025c45575bfe1e7bf7bdf7e71e87 ~ 91c34cd6ca1bc67ccf2d104834956af56b5893de -
Linux Linux 6.15 -

II. Public POCs for CVE-2025-39868

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III. Intelligence Information for CVE-2025-39868

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Same Patch Batch · Linux · 2025-09-23 · 21 CVEs total

CVE-2025-39880 9.8 CRITICAL libceph: fix invalid accesses to ceph_connection_v1_info
CVE-2025-39869 8.4 HIGH dmaengine: ti: edma: Fix memory allocation size for queue_priority_map
CVE-2025-39882 8.4 HIGH drm/mediatek: fix potential OF node use-after-free
CVE-2025-39872 7.8 HIGH hsr: hold rcu and dev lock for hsr_get_port_ndev
CVE-2025-39873 7.8 HIGH can: xilinx_can: xcan_write_frame(): fix use-after-free of transmitted SKB
CVE-2025-39888 7.8 HIGH fuse: Block access to folio overlimit
CVE-2025-39881 7.8 HIGH kernfs: Fix UAF in polling when open file is released
CVE-2025-39887 tracing/osnoise: Fix null-ptr-deref in bitmap_parselist()
CVE-2025-39870 dmaengine: idxd: Fix double free in idxd_setup_wqs()
CVE-2025-39885 ocfs2: fix recursive semaphore deadlock in fiemap call
CVE-2025-39886 bpf: Tell memcg to use allow_spinning=false path in bpf_timer_init()
CVE-2025-39883 mm/memory-failure: fix VM_BUG_ON_PAGE(PagePoisoned(page)) when unpoison memory
CVE-2025-39884 btrfs: fix subvolume deletion lockup caused by inodes xarray race
CVE-2025-39878 ceph: fix crash after fscrypt_encrypt_pagecache_blocks() error
CVE-2025-39879 ceph: always call ceph_shift_unused_folios_left()
CVE-2025-39877 mm/damon/sysfs: fix use-after-free in state_show()
CVE-2025-39876 net: fec: Fix possible NPD in fec_enet_phy_reset_after_clk_enable()
CVE-2025-39874 macsec: sync features on RTM_NEWLINK
CVE-2025-39875 igb: Fix NULL pointer dereference in ethtool loopback test
CVE-2025-39871 dmaengine: idxd: Remove improper idxd_free

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-39868

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