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CVE-2026-68366— usb: gadget: uvc: clamp SEND_RESPONSE length to the response buffer

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，该漏洞源于对SEND_RESPONSE请求长度验证不足，可能导致越界读取。

AI Predicted 7.8 Difficulty: Moderate EPSS 0.18% · P8

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1< eaf783c005299a702f2cc96b08cd21ede081f098 affected
a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1< 568e68d8f80395a64848aa2946af8ade72da0ffb affected
a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1< 82ec2c1e456b17451f0736c3983402642f961733 affected
a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1< 4e116372b7a4f87df0dc0ed4b0ab5b0bb0cc5796 affected
a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1< 662f6c6c6ff8a6c508e1646c09cae74e28f3cca6 affected
a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1< 1f03658f3e9b2f8fd1d1003ba389a0390b49a350 affected
a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1< c8510fbbea09ef0170b56b14dc2b5890dc75be07 affected
a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1< b70dc75e85ba968b7b76eebfe5d63000080b875b affected
… +10 more rows
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I. Basic Information for CVE-2026-68366

Vulnerability Information
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Vulnerability Title
usb: gadget: uvc: clamp SEND_RESPONSE length to the response buffer
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: usb: gadget: uvc: clamp SEND_RESPONSE length to the response buffer uvc_send_response() builds the UVC control response from a user-supplied struct uvc_request_data: req->length = min_t(unsigned int, uvc->event_length, data->length); ... memcpy(req->buf, data->data, req->length); req->length is clamped to uvc->event_length, which is taken from the host control request wLength (up to UVC_MAX_REQUEST_SIZE, 64), and to data->length, which comes from the UVCIOC_SEND_RESPONSE ioctl and is only checked for being negative. The source buffer data->data is only 60 bytes, so a response with uvc->event_length and data->length both greater than 60 makes memcpy() read past the end of data->data. Clamp req->length to sizeof(data->data) 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基金会开源的一个操作系统内核。 Linux kernel存在安全漏洞，该漏洞源于对SEND_RESPONSE请求长度验证不足，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 a5eaaa1f33e771fa1651a4a7652b8a5f9fa7f6c1 ~ eaf783c005299a702f2cc96b08cd21ede081f098 -
Linux Linux 3.10 -

II. Public POCs for CVE-2026-68366

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III. Intelligence Information for CVE-2026-68366

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Patches & Fixes for CVE-2026-68366 (8)

Same Patch Batch · Linux · 2026-08-10 · 344 CVEs total

CVE-2026-68117 9.8 CRITICAL tipc: clear sock->sk on the failed-insert path in tipc_sk_create()
CVE-2026-68161 9.8 CRITICAL sctp: close UDP tunnel sockets during netns teardown
CVE-2026-68160 9.8 CRITICAL ceph: fix pre-auth out-of-bounds read on snaptrace in ceph_handle_caps()
CVE-2026-68123 9.8 CRITICAL openvswitch: fix GSO userspace truncation underflow
CVE-2026-68302 9.8 CRITICAL amt: re-read skb header pointers after every pull
CVE-2026-68381 9.8 CRITICAL ksmbd: pin conn during async oplock break notification
CVE-2026-68385 9.8 CRITICAL s390/checksum: Fix csum_partial() without vector facility
CVE-2026-68159 9.8 CRITICAL libceph: bound pg_{temp,upmap,upmap_items} length to CEPH_PG_MAX_SIZE
CVE-2026-68127 9.8 CRITICAL ila: reload IPv6 header after pskb_may_pull in checksum adjust
CVE-2026-68388 9.8 CRITICAL smb/client: handle overlapping allocated ranges in fallocate
CVE-2026-68144 9.8 CRITICAL phonet: pep: fix use-after-free in pep_get_sb()
CVE-2026-68137 9.8 CRITICAL net/x25: fix use-after-free in x25_kill_by_neigh()
CVE-2026-68136 9.8 CRITICAL net: gro: fix double aggregation of flush-marked skbs
CVE-2026-68170 9.8 CRITICAL mptcp: fix stale skb->sk reference on subflow close
CVE-2026-68426 9.8 CRITICAL xfrm: fix stale skb->prev after async crypto steals a GSO segment
CVE-2026-68156 9.8 CRITICAL libceph: refresh auth->authorizer_buf{,_len} after authorizer update
CVE-2026-68158 9.8 CRITICAL libceph: Fix multiplication overflow in decode_new_up_state_weight()
CVE-2026-68300 9.8 CRITICAL sctp: auth: verify auth requirement when auth_chunk is NULL
CVE-2026-68154 9.8 CRITICAL libceph: reject zero bucket types in crush_decode
CVE-2026-68124 9.6 CRITICAL mctp: serial: handle zero-length frames to prevent rx buffer overflow

Showing top 20 of 344 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-68366

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