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CVE-2026-74679— usb: gadget: f_ncm: Use unsigned int for ndp_index

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基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于ndp_index变量被声明为有符号整数，但存储了无符号返回值，恶意主机可提供大型偏移量导致有符号整数溢出，从而绕过安全检查并导致对NDP块地址的越界读取。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.18% · P8

Possible ATT&CK Techniques 1 AI

T1203 · Exploitation for Client Execution

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 370af734dfaf8336b496b386e194648e097e248a< 9c8c6825a750fcd3efbe922847ca70ccd5a66857 affected
370af734dfaf8336b496b386e194648e097e248a< a1c0deeba4a46481543d6b09c665f758c54c3a1a affected
370af734dfaf8336b496b386e194648e097e248a< d13f650a3485b58c124b3cda45597e8002c9c833 affected
370af734dfaf8336b496b386e194648e097e248a< 11413d7ed42174b8f5d8d0b6a25d10dc88239b21 affected
370af734dfaf8336b496b386e194648e097e248a< 5b2b3a3229a3f4c493ffdee53aee2f173b6f13b3 affected
370af734dfaf8336b496b386e194648e097e248a< d328fdc607fa1bb668ad512e1c918a120f78f337 affected
370af734dfaf8336b496b386e194648e097e248a< fc9e54e22845c4da29588ca0986cb7c795b5a262 affected
370af734dfaf8336b496b386e194648e097e248a< 6b1c8a9403a26cb0fed7a648916c74dc236da591 affected
… +10 more rows
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I. Basic Information for CVE-2026-74679

Vulnerability Information
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Vulnerability Title
usb: gadget: f_ncm: Use unsigned int for ndp_index
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: f_ncm: Use unsigned int for ndp_index The variable ndp_index is declared as a signed integer, but it stores the return value of get_ncm(), which is unsigned. A malicious host can supply a large offset that overflows the signed ndp_index, making it negative. Because ndp_index is compared against unsigned bounds, this negative value bypasses sanity checks and leads to an out-of-bounds read when calculating the address of the NDP block (ntb_ptr + ndp_index). Fix this by changing ndp_index to unsigned int to ensure consistent unsigned comparisons throughout the function.
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基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于ndp_index变量被声明为有符号整数，但存储了无符号返回值，恶意主机可提供大型偏移量导致有符号整数溢出，从而绕过安全检查并导致对NDP块地址的越界读取。
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 370af734dfaf8336b496b386e194648e097e248a ~ 9c8c6825a750fcd3efbe922847ca70ccd5a66857 -
Linux Linux 3.17 -

II. Public POCs for CVE-2026-74679

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III. Intelligence Information for CVE-2026-74679

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Patches & Fixes for CVE-2026-74679 (8)

Same Patch Batch · Linux · 2026-08-22 · 149 CVEs total

CVE-2026-74612 10.0 CRITICAL veth: fix skb length accounting after XDP frag adjustment
CVE-2026-74705 10.0 CRITICAL udp: fix potential use-after-free in tunnel segmentation
CVE-2026-74628 9.8 CRITICAL net/x25: fix use-after-free of the socket by its timers
CVE-2026-74688 9.8 CRITICAL sctp: clear control chunk transport if it is being removed
CVE-2026-74617 9.8 CRITICAL dibs: initialise dibs->lock in dibs_dev_alloc()
CVE-2026-74616 9.8 CRITICAL xdp: reject clones that overrun skb_shared_info tailroom
CVE-2026-74611 9.8 CRITICAL tls: rx: restore msg_iter before TLS 1.3 optimistic retry
CVE-2026-74608 9.8 CRITICAL smb: client: Fix use-after-free in cifs_try_adding_channels()
CVE-2026-74723 9.8 CRITICAL btrfs: lzo: reject inline extents without valid headers
CVE-2026-74727 9.8 CRITICAL ovpn: skip rehash for peers already removed from by_id
CVE-2026-74662 9.8 CRITICAL inet: frags: publish queues before arming timer
CVE-2026-74597 9.8 CRITICAL ip6_tunnel: clear skb2->cb[] in ip6ip6_err()
CVE-2026-74730 9.8 CRITICAL NFS: Pin the 'struct nfs_server' during a FREE_STATEID call
CVE-2026-74591 9.8 CRITICAL mm/filemap: __filemap_add_folio() restore index before retrying
CVE-2026-74669 9.8 CRITICAL ipvs: clear IPv4 options after rebasing tunnel ICMP errors
CVE-2026-74588 9.8 CRITICAL sctp: keep chunk->transport in step with the list it is queued on
CVE-2026-74587 9.8 CRITICAL sctp: fix use-after-free of cached ASCONF chunk
CVE-2026-74586 9.8 CRITICAL sctp: clear new_transport when removing a peer
CVE-2026-74712 9.3 CRITICAL vdpa/mlx5: Fix buffer length in create_direct_keys()
CVE-2026-74665 9.1 CRITICAL net: fix skb length accounting after generic XDP frag adjustment

Showing top 20 of 149 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-74679

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