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CVE-2025-38247— userns and mnt_idmap leak in open_tree_attr(2)

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open_tree_attr中userns和mnt_idmap泄漏。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.14% · P3

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 6

VendorProduct Version RangeStatus
Linux Linux c4a16820d90199409c9bf01c4f794e1e9e8d8fd8< 142db4e76110dd80239f4e79810f85ea1735ad60 affected
c4a16820d90199409c9bf01c4f794e1e9e8d8fd8< 0748e553df0225754c316a92af3a77fdc057b358 affected
6.15 affected
< 6.15 unaffected
6.15.5≤ 6.15.* unaffected
6.16≤ * unaffected
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I. Basic Information for CVE-2025-38247

Vulnerability Information
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Vulnerability Title
userns and mnt_idmap leak in open_tree_attr(2)
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: userns and mnt_idmap leak in open_tree_attr(2) Once want_mount_setattr() has returned a positive, it does require finish_mount_kattr() to release ->mnt_userns. Failing do_mount_setattr() does not change that. As the result, we can end up leaking userns and possibly mnt_idmap as well.
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open_tree_attr中userns和mnt_idmap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 c4a16820d90199409c9bf01c4f794e1e9e8d8fd8 ~ 142db4e76110dd80239f4e79810f85ea1735ad60 -
Linux Linux 6.15 -

II. Public POCs for CVE-2025-38247

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III. Intelligence Information for CVE-2025-38247

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Same Patch Batch · Linux · 2025-07-09 · 26 CVEs total

CVE-2025-38264 9.8 CRITICAL nvme-tcp: sanitize request list handling
CVE-2025-38246 9.8 CRITICAL bnxt: properly flush XDP redirect lists
CVE-2025-38238 8.8 HIGH scsi: fnic: Fix crash in fnic_wq_cmpl_handler when FDMI times out
CVE-2025-38253 8.8 HIGH HID: wacom: fix crash in wacom_aes_battery_handler()
CVE-2025-38242 7.8 HIGH mm: userfaultfd: fix race of userfaultfd_move and swap cache
CVE-2025-38261 7.8 HIGH riscv: save the SR_SUM status over switches
CVE-2025-38262 7.8 HIGH tty: serial: uartlite: register uart driver in init
CVE-2025-38248 7.8 HIGH bridge: mcast: Fix use-after-free during router port configuration
CVE-2025-38250 7.8 HIGH Bluetooth: hci_core: Fix use-after-free in vhci_flush()
CVE-2025-38252 7.8 HIGH cxl/ras: Fix CPER handler device confusion
CVE-2025-38244 7.5 HIGH smb: client: fix potential deadlock when reconnecting channels
CVE-2025-38239 7.3 HIGH scsi: megaraid_sas: Fix invalid node index
CVE-2025-38257 7.3 HIGH s390/pkey: Prevent overflow in size calculation for memdup_user()
CVE-2025-38251 atm: clip: prevent NULL deref in clip_push()
CVE-2025-38254 drm/amd/display: Add sanity checks for drm_edid_raw()
CVE-2025-38255 lib/group_cpus: fix NULL pointer dereference from group_cpus_evenly()
CVE-2025-38256 io_uring/rsrc: fix folio unpinning
CVE-2025-38249 ALSA: usb-audio: Fix out-of-bounds read in snd_usb_get_audioformat_uac3()
CVE-2025-38258 mm/damon/sysfs-schemes: free old damon_sysfs_scheme_filter->memcg_path on write
CVE-2025-38259 ASoC: codecs: wcd9335: Fix missing free of regulator supplies

Showing top 20 of 26 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-38247

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