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CVE-2025-68191— udp_tunnel: use netdev_warn() instead of netdev_WARN()

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，该漏洞源于使用不当的警告级别，可能导致错误信息误导。

AI Predicted 5.5 Difficulty: Theoretical EPSS 0.21% · P10

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux cc4e3835eff474aa274d6e1d18f69d9d296d3b76< 087f1ed450dc6e7e49ffbbbe5b78be1218c6d5e0 affected
cc4e3835eff474aa274d6e1d18f69d9d296d3b76< 45e4e4a8772fa1c5f6f38e82b732b3a9d8137af4 affected
cc4e3835eff474aa274d6e1d18f69d9d296d3b76< 7758ec35ff3e9a31558eda4f0f9eb0ddfa78a8ba affected
cc4e3835eff474aa274d6e1d18f69d9d296d3b76< c018a87942bf1607aeebf8dba5a210ca9a09a0fd affected
cc4e3835eff474aa274d6e1d18f69d9d296d3b76< 51b3033088f0420b19027e3d54cd989b6ebd987e affected
cc4e3835eff474aa274d6e1d18f69d9d296d3b76< 3c3b148bf8384c8a787753cf20abde1c5731f97f affected
cc4e3835eff474aa274d6e1d18f69d9d296d3b76< dc2f650f7e6857bf384069c1a56b2937a1ee370d affected
5.9 affected
… +8 more rows
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I. Basic Information for CVE-2025-68191

Vulnerability Information
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Vulnerability Title
udp_tunnel: use netdev_warn() instead of netdev_WARN()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: udp_tunnel: use netdev_warn() instead of netdev_WARN() netdev_WARN() uses WARN/WARN_ON to print a backtrace along with file and line information. In this case, udp_tunnel_nic_register() returning an error is just a failed operation, not a kernel bug. udp_tunnel_nic_register() can fail due to a memory allocation failure (kzalloc() or udp_tunnel_nic_alloc()). This is a normal runtime error and not a kernel bug. Replace netdev_WARN() with netdev_warn() accordingly.
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，该漏洞源于使用不当的警告级别，可能导致错误信息误导。
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 cc4e3835eff474aa274d6e1d18f69d9d296d3b76 ~ 087f1ed450dc6e7e49ffbbbe5b78be1218c6d5e0 -
Linux Linux 5.9 -

II. Public POCs for CVE-2025-68191

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III. Intelligence Information for CVE-2025-68191

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Other References for CVE-2025-68191 (7)

Same Patch Batch · Linux · 2025-12-16 · 156 CVEs total

CVE-2025-68284 9.8 CRITICAL libceph: prevent potential out-of-bounds writes in handle_auth_session_key()
CVE-2025-40350 9.8 CRITICAL net/mlx5e: RX, Fix generating skb from non-linear xdp_buff for striding RQ
CVE-2025-68263 9.8 CRITICAL ksmbd: ipc: fix use-after-free in ipc_msg_send_request
CVE-2025-68192 9.8 CRITICAL net: usb: qmi_wwan: initialize MAC header offset in qmimux_rx_fixup
CVE-2025-68301 9.8 CRITICAL net: atlantic: fix fragment overflow handling in RX path
CVE-2025-68285 9.8 CRITICAL libceph: fix potential use-after-free in have_mon_and_osd_map()
CVE-2025-68315 9.8 CRITICAL f2fs: fix to detect potential corrupted nid in free_nid_list
CVE-2025-68226 8.8 HIGH smb: client: fix incomplete backport in cfids_invalidation_worker()
CVE-2025-68255 8.8 HIGH staging: rtl8723bs: fix stack buffer overflow in OnAssocReq IE parsing
CVE-2025-68256 8.8 HIGH staging: rtl8723bs: fix out-of-bounds read in rtw_get_ie() parser
CVE-2025-68304 8.8 HIGH Bluetooth: hci_core: lookup hci_conn on RX path on protocol side
CVE-2025-68314 8.8 HIGH drm/msm: make sure last_fence is always updated
CVE-2025-40362 8.8 HIGH ceph: fix multifs mds auth caps issue
CVE-2025-68250 8.2 HIGH hung_task: fix warnings caused by unaligned lock pointers
CVE-2025-68183 7.8 HIGH ima: don't clear IMA_DIGSIG flag when setting or removing non-IMA xattr
CVE-2025-68212 7.8 HIGH fs: Fix uninitialized 'offp' in statmount_string()
CVE-2025-68208 7.8 HIGH bpf: account for current allocated stack depth in widen_imprecise_scalars()
CVE-2025-68207 7.8 HIGH drm/xe/guc: Synchronize Dead CT worker with unbind
CVE-2025-68303 7.8 HIGH platform/x86: intel: punit_ipc: fix memory corruption
CVE-2025-68181 7.8 HIGH drm/radeon: Remove calls to drm_put_dev()

Showing top 20 of 156 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-68191

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