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CVE-2026-31755— usb: cdns3: gadget: fix NULL pointer dereference in ep_queue

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usb cdns3 gadget驱动在ep_queue中ep->desc指针为空时未检查，可能导致空指针取消引用。

AI Predicted 4.4 Difficulty: Moderate EPSS 0.16% · P5

Possible ATT&CK Techniques 1 AI

T1053 · Scheduled Task/Job

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 7733f6c32e36ff9d7adadf40001039bf219b1cbe< 3cf0580a09d417eab41ce914a11f9cde3a121871 affected
7733f6c32e36ff9d7adadf40001039bf219b1cbe< 3d1433fe34b224b90259e207e5389e95b504ef04 affected
7733f6c32e36ff9d7adadf40001039bf219b1cbe< fb2ad0c1334a3eccfe4ed203f9eef5a4879226f6 affected
7733f6c32e36ff9d7adadf40001039bf219b1cbe< 9ab9b0e5fcdac325f950fc8b6caa08a9e22a0db9 affected
7733f6c32e36ff9d7adadf40001039bf219b1cbe< d61446dfc9d387775bb1b95b081953201b9222af affected
7733f6c32e36ff9d7adadf40001039bf219b1cbe< 390536cc6af4ca5566bc3bf1f8b704700380cd2c affected
7733f6c32e36ff9d7adadf40001039bf219b1cbe< 14bf08ab2cdfcdfd3f13e799d06692a1b3e0745f affected
7733f6c32e36ff9d7adadf40001039bf219b1cbe< 7f6f127b9bc34bed35f56faf7ecb1561d6b39000 affected
… +10 more rows
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I. Basic Information for CVE-2026-31755

Vulnerability Information
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Vulnerability Title
usb: cdns3: gadget: fix NULL pointer dereference in ep_queue
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: usb: cdns3: gadget: fix NULL pointer dereference in ep_queue When the gadget endpoint is disabled or not yet configured, the ep->desc pointer can be NULL. This leads to a NULL pointer dereference when __cdns3_gadget_ep_queue() is called, causing a kernel crash. Add a check to return -ESHUTDOWN if ep->desc is NULL, which is the standard return code for unconfigured endpoints. This prevents potential crashes when ep_queue is called on endpoints that are not ready.
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usb cdns3 gadget驱动在ep_queue中ep->desc指针为空时未检查，可能导致空指针取消引用。
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 7733f6c32e36ff9d7adadf40001039bf219b1cbe ~ 3cf0580a09d417eab41ce914a11f9cde3a121871 -
Linux Linux 5.4 -

II. Public POCs for CVE-2026-31755

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III. Intelligence Information for CVE-2026-31755

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Patches & Fixes for CVE-2026-31755 (8)

Same Patch Batch · Linux · 2026-05-01 · 146 CVEs total

CVE-2026-43011 9.8 CRITICAL net/x25: Fix potential double free of skb
CVE-2026-43037 9.8 CRITICAL ip6_tunnel: clear skb2->cb[] in ip4ip6_err()
CVE-2026-31705 9.8 CRITICAL ksmbd: fix out-of-bounds write in smb2_get_ea() EA alignment
CVE-2026-43038 9.8 CRITICAL ipv6: icmp: clear skb2->cb[] in ip6_err_gen_icmpv6_unreach()
CVE-2026-43039 9.8 CRITICAL net: ti: icssg-prueth: fix missing data copy and wrong recycle in ZC RX dispatch
CVE-2026-31718 9.8 CRITICAL ksmbd: fix use-after-free in __ksmbd_close_fd() via durable scavenger
CVE-2026-43018 8.8 HIGH Bluetooth: hci_event: fix potential UAF in hci_le_remote_conn_param_req_evt
CVE-2026-31773 8.8 HIGH Bluetooth: SMP: derive legacy responder STK authentication from MITM state
CVE-2026-31739 8.8 HIGH crypto: tegra - Add missing CRYPTO_ALG_ASYNC
CVE-2026-31735 8.8 HIGH iommupt: Fix short gather if the unmap goes into a large mapping
CVE-2026-31717 8.8 HIGH ksmbd: validate owner of durable handle on reconnect
CVE-2026-43048 8.8 HIGH HID: core: Mitigate potential OOB by removing bogus memset()
CVE-2026-31709 8.8 HIGH smb: client: validate the whole DACL before rewriting it in cifsacl
CVE-2026-31706 8.8 HIGH ksmbd: validate num_aces and harden ACE walk in smb_inherit_dacl()
CVE-2026-31712 8.3 HIGH ksmbd: require minimum ACE size in smb_check_perm_dacl()
CVE-2026-31771 8.1 HIGH Bluetooth: hci_event: move wake reason storage into validated event handlers
CVE-2026-31779 8.1 HIGH wifi: iwlwifi: mvm: fix potential out-of-bounds read in iwl_mvm_nd_match_info_handler()
CVE-2026-43051 8.1 HIGH HID: wacom: fix out-of-bounds read in wacom_intuos_bt_irq
CVE-2026-31708 8.1 HIGH smb: client: fix OOB read in smb2_ioctl_query_info QUERY_INFO path
CVE-2026-31695 7.8 HIGH wifi: virt_wifi: remove SET_NETDEV_DEV to avoid use-after-free

Showing top 20 of 146 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-31755

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