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CVE-2026-45923— net: usb: catc: enable basic endpoint checking

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net/usb/catc驱动中catc_probe函数使用硬编码端点管道填充URB而未验证端点描述符，可能导致恶意USB设备利用不匹配的传输类型进行攻击。

AI Predicted 5.3 Difficulty: Moderate EPSS 0.16% · P6

Possible ATT&CK Techniques 1 AI

T1200 · Hardware Additions

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< eade522d3e6ac3f3bfb51bfa5b5b4b32bd0b846f affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< ac7739b78ded519e1d9919a814da3b34120bec8c affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 163d04897e57633c5d2e69734e4e4b22bb63f50d affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< a488001a8197da4f9c413eec8f6acbff71c60145 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 36c28b028efba0f42218d41fed12c47ce217c1f1 affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 1a42cfced8900d33d032c7ec338484855b61b8cc affected
1da177e4c3f41524e886b7f1b8a0c1fc7321cac2< 9e7021d2aeae57c323a6f722ed7915686cdcc123 affected
2.6.12 affected
… +8 more rows
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I. Basic Information for CVE-2026-45923

Vulnerability Information
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Vulnerability Title
net: usb: catc: enable basic endpoint checking
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: usb: catc: enable basic endpoint checking catc_probe() fills three URBs with hardcoded endpoint pipes without verifying the endpoint descriptors: - usb_sndbulkpipe(usbdev, 1) and usb_rcvbulkpipe(usbdev, 1) for TX/RX - usb_rcvintpipe(usbdev, 2) for interrupt status A malformed USB device can present these endpoints with transfer types that differ from what the driver assumes. Add a catc_usb_ep enum for endpoint numbers, replacing magic constants throughout. Add usb_check_bulk_endpoints() and usb_check_int_endpoints() calls after usb_set_interface() to verify endpoint types before use, rejecting devices with mismatched descriptors at probe time. Similar to - commit 90b7f2961798 ("net: usb: rtl8150: enable basic endpoint checking") which fixed the issue in rtl8150.
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net/usb/catc驱动中catc_probe函数使用硬编码端点管道填充URB而未验证端点描述符，可能导致恶意USB设备利用不匹配的传输类型进行攻击。
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 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 ~ eade522d3e6ac3f3bfb51bfa5b5b4b32bd0b846f -
Linux Linux 2.6.12 -

II. Public POCs for CVE-2026-45923

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III. Intelligence Information for CVE-2026-45923

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Patches & Fixes for CVE-2026-45923 (7)

Same Patch Batch · Linux · 2026-05-27 · 275 CVEs total

CVE-2026-46039 9.8 CRITICAL rxgk: Fix potential integer overflow in length check
CVE-2026-45898 9.8 CRITICAL RDMA/iwcm: Fix workqueue list corruption by removing work_list
CVE-2026-45988 9.8 CRITICAL rxrpc: Fix re-decryption of RESPONSE packets
CVE-2026-45972 9.8 CRITICAL smb: client: fix potential UAF and double free in smb2_open_file()
CVE-2026-46043 9.1 CRITICAL RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
CVE-2026-45945 8.8 HIGH iommu/vt-d: Fix race condition during PASID entry replacement
CVE-2026-46056 8.8 HIGH Bluetooth: hci_event: fix potential UAF in SSP passkey handlers
CVE-2026-45843 8.2 HIGH slip: bound decode() reads against the compressed packet length
CVE-2025-71311 8.2 HIGH fs/ntfs3: Initialize new folios before use
CVE-2026-46037 8.2 HIGH ipv4: icmp: validate reply type before using icmp_pointers
CVE-2026-46099 8.1 HIGH net: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels
CVE-2026-46010 8.1 HIGH rxrpc: Fix error handling in rxgk_extract_token()
CVE-2026-46076 7.9 HIGH KVM: nSVM: Raise #UD if unhandled VMMCALL isn't intercepted by L1
CVE-2026-45909 7.8 HIGH clk: mediatek: Drop __initconst from gates
CVE-2026-45862 7.8 HIGH iommu/vt-d: Flush cache for PASID table before using it
CVE-2026-45956 7.8 HIGH drm/exynos: vidi: use priv->vidi_dev for ctx lookup in vidi_connection_ioctl()
CVE-2026-45910 7.8 HIGH RDMA/rxe: Fix race condition in QP timer handlers
CVE-2026-45942 7.8 HIGH ext4: fix e4b bitmap inconsistency reports
CVE-2026-45894 7.8 HIGH iommu/vt-d: Clear Present bit before tearing down PASID entry
CVE-2026-45933 7.8 HIGH bpf: Preserve id of register in sync_linked_regs()

Showing top 20 of 275 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-45923

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