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CVE-2025-71107— f2fs: ensure node page reads complete before f2fs_put_super() finishes

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，该漏洞源于节点页读取未在f2fs_put_super完成前结束，可能导致文件系统引用计数泄漏。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1211 · Exploitation for Stealth

Affected Version Matrix 12

VendorProduct Version RangeStatus
Linux Linux 20872584b8c0b006c007da9588a272c9e28d2e18< c3031cf2b61f1508662fc95ef9ad505cb0882a5f affected
20872584b8c0b006c007da9588a272c9e28d2e18< 3b15d5f12935e9e25f9a571e680716bc9ee61025 affected
20872584b8c0b006c007da9588a272c9e28d2e18< 0b36fae23621a09e772c8adf918b9011158f8511 affected
20872584b8c0b006c007da9588a272c9e28d2e18< 297baa4aa263ff8f5b3d246ee16a660d76aa82c4 affected
0e2577074b459bba7f4016f4d725ede37d48bb22 affected
6.4.16< 6.5 affected
6.5 affected
< 6.5 unaffected
… +4 more rows
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I. Basic Information for CVE-2025-71107

Vulnerability Information
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Vulnerability Title
f2fs: ensure node page reads complete before f2fs_put_super() finishes
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: f2fs: ensure node page reads complete before f2fs_put_super() finishes Xfstests generic/335, generic/336 sometimes crash with the following message: F2FS-fs (dm-0): detect filesystem reference count leak during umount, type: 9, count: 1 ------------[ cut here ]------------ kernel BUG at fs/f2fs/super.c:1939! Oops: invalid opcode: 0000 [#1] SMP NOPTI CPU: 1 UID: 0 PID: 609351 Comm: umount Tainted: G W 6.17.0-rc5-xfstests-g9dd1835ecda5 #1 PREEMPT(none) Tainted: [W]=WARN Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:f2fs_put_super+0x3b3/0x3c0 Call Trace: <TASK> generic_shutdown_super+0x7e/0x190 kill_block_super+0x1a/0x40 kill_f2fs_super+0x9d/0x190 deactivate_locked_super+0x30/0xb0 cleanup_mnt+0xba/0x150 task_work_run+0x5c/0xa0 exit_to_user_mode_loop+0xb7/0xc0 do_syscall_64+0x1ae/0x1c0 entry_SYSCALL_64_after_hwframe+0x76/0x7e </TASK> ---[ end trace 0000000000000000 ]--- It appears that sometimes it is possible that f2fs_put_super() is called before all node page reads are completed. Adding a call to f2fs_wait_on_all_pages() for F2FS_RD_NODE fixes the problem.
Source: CVE Program / CVE List V5
CVSS Information
N/A
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，该漏洞源于节点页读取未在f2fs_put_super完成前结束，可能导致文件系统引用计数泄漏。
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 20872584b8c0b006c007da9588a272c9e28d2e18 ~ c3031cf2b61f1508662fc95ef9ad505cb0882a5f -
Linux Linux 6.5 -

II. Public POCs for CVE-2025-71107

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III. Intelligence Information for CVE-2025-71107

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Same Patch Batch · Linux · 2026-01-14 · 43 CVEs total

CVE-2025-71116 9.1 CRITICAL libceph: make decode_pool() more resilient against corrupted osdmaps
CVE-2025-71112 8.8 HIGH net: hns3: add VLAN id validation before using
CVE-2025-71130 7.8 HIGH drm/i915/gem: Zero-initialize the eb.vma array in i915_gem_do_execbuffer
CVE-2025-71120 7.5 HIGH SUNRPC: svcauth_gss: avoid NULL deref on zero length gss_token in gss_read_proxy_verf
CVE-2025-71126 7.5 HIGH mptcp: avoid deadlock on fallback while reinjecting
CVE-2025-71128 7.5 HIGH erspan: Initialize options_len before referencing options.
CVE-2025-71131 7.5 HIGH crypto: seqiv - Do not use req->iv after crypto_aead_encrypt
CVE-2025-71132 7.5 HIGH smc91x: fix broken irq-context in PREEMPT_RT
CVE-2025-71127 7.1 HIGH wifi: mac80211: Discard Beacon frames to non-broadcast address
CVE-2025-71136 7.1 HIGH media: adv7842: Avoid possible out-of-bounds array accesses in adv7842_cp_log_status()
CVE-2025-71109 7.1 HIGH MIPS: ftrace: Fix memory corruption when kernel is located beyond 32 bits
CVE-2025-71108 usb: typec: ucsi: Handle incorrect num_connectors capability
CVE-2025-71111 hwmon: (w83791d) Convert macros to functions to avoid TOCTOU
CVE-2025-71104 KVM: x86: Fix VM hard lockup after prolonged inactivity with periodic HV timer
CVE-2025-71115 um: init cpu_tasks[] earlier
CVE-2025-71103 drm/msm: adreno: fix deferencing ifpc_reglist when not declared
CVE-2025-71117 block: Remove queue freezing from several sysfs store callbacks
CVE-2025-71118 ACPICA: Avoid walking the Namespace if start_node is NULL
CVE-2025-71102 scs: fix a wrong parameter in __scs_magic
CVE-2025-71105 f2fs: use global inline_xattr_slab instead of per-sb slab cache

Showing top 20 of 43 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-71107

Anonymous User
2026-01-15 06:08:19

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