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CVE-2025-21742— usbnet: ipheth: use static NDP16 location in URB

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ipheth驱动中NDP16位置未固定，可能导致越界读取。

AI Predicted 4.3 Difficulty: Easy EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux a2d274c62e44b1995c170595db3865c6fe701226< 8fb062178e1ce180e2cfdc9abc83a1b9fea381ca affected
a2d274c62e44b1995c170595db3865c6fe701226< cf1ac7f7cf601ac31d1580559c002b5e37b733b7 affected
a2d274c62e44b1995c170595db3865c6fe701226< 2b619445dcb6dab97d8ed033fb57225aca1288c4 affected
a2d274c62e44b1995c170595db3865c6fe701226< 86586dcb75cb8fd062a518aca8ee667938b91efb affected
6.5 affected
< 6.5 unaffected
6.6.78≤ 6.6.* unaffected
6.12.14≤ 6.12.* unaffected
… +2 more rows
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I. Basic Information for CVE-2025-21742

Vulnerability Information
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Vulnerability Title
usbnet: ipheth: use static NDP16 location in URB
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: usbnet: ipheth: use static NDP16 location in URB Original code allowed for the start of NDP16 to be anywhere within the URB based on the `wNdpIndex` value in NTH16. Only the start position of NDP16 was checked, so it was possible for even the fixed-length part of NDP16 to extend past the end of URB, leading to an out-of-bounds read. On iOS devices, the NDP16 header always directly follows NTH16. Rely on and check for this specific format. This, along with NCM-specific minimal URB length check that already exists, will ensure that the fixed-length part of NDP16 plus a set amount of DPEs fit within the URB. Note that this commit alone does not fully address the OoB read. The limit on the amount of DPEs needs to be enforced separately.
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ipheth驱动中NDP16位置未固定，可能导致越界读取。
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 a2d274c62e44b1995c170595db3865c6fe701226 ~ 8fb062178e1ce180e2cfdc9abc83a1b9fea381ca -
Linux Linux 6.5 -

II. Public POCs for CVE-2025-21742

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III. Intelligence Information for CVE-2025-21742

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Patches & Fixes for CVE-2025-21742 (4)

Same Patch Batch · Linux · 2025-02-27 · 177 CVEs total

CVE-2025-21796 9.8 CRITICAL nfsd: clear acl_access/acl_default after releasing them
CVE-2025-21805 9.8 CRITICAL RDMA/rtrs: Add missing deinit() call
CVE-2025-21707 9.8 CRITICAL mptcp: consolidate suboption status
CVE-2025-21748 9.8 CRITICAL ksmbd: fix integer overflows on 32 bit systems
CVE-2024-58006 9.6 CRITICAL PCI: dwc: ep: Prevent changing BAR size/flags in pci_epc_set_bar()
CVE-2025-21735 8.8 HIGH NFC: nci: Add bounds checking in nci_hci_create_pipe()
CVE-2024-57999 8.8 HIGH powerpc/pseries/iommu: IOMMU incorrectly marks MMIO range in DDW
CVE-2024-57997 8.8 HIGH wifi: wcn36xx: fix channel survey memory allocation size
CVE-2024-57995 8.8 HIGH wifi: ath12k: fix read pointer after free in ath12k_mac_assign_vif_to_vdev()
CVE-2025-21710 8.2 HIGH tcp: correct handling of extreme memory squeeze
CVE-2024-57973 8.1 HIGH rdma/cxgb4: Prevent potential integer overflow on 32bit
CVE-2025-21760 8.1 HIGH ndisc: extend RCU protection in ndisc_send_skb()
CVE-2025-21766 8.1 HIGH ipv4: use RCU protection in __ip_rt_update_pmtu()
CVE-2025-21765 8.1 HIGH ipv6: use RCU protection in ip6_default_advmss()
CVE-2025-21762 8.1 HIGH arp: use RCU protection in arp_xmit()
CVE-2025-21730 7.8 HIGH wifi: rtw89: avoid to init mgnt_entry list twice when WoWLAN failed
CVE-2025-21729 7.8 HIGH wifi: rtw89: fix race between cancel_hw_scan and hw_scan completion
CVE-2025-21772 7.8 HIGH partitions: mac: fix handling of bogus partition table
CVE-2024-52560 7.8 HIGH fs/ntfs3: Mark inode as bad as soon as error detected in mi_enum_attr()
CVE-2024-58002 7.8 HIGH media: uvcvideo: Remove dangling pointers

Showing top 20 of 177 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2025-21742

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