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CVE-2026-31759— usb: ulpi: fix double free in ulpi_register_interface() error path

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 ulpi驱动在ulpi_register_interface错误路径中调用put_device后再次释放ulpi，可能导致双重释放。

AI Predicted 5.3 Difficulty: Easy EPSS 0.13% · P3

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 289fcff4bcdb1dcc0ce8788b7ea0f58a9e4a495f< 2f70ba9dae13a190673cc3f9b4aad52179738f60 affected
289fcff4bcdb1dcc0ce8788b7ea0f58a9e4a495f< ee248e6e941e4f2e634df2bd43e5f1ef810ab6df affected
289fcff4bcdb1dcc0ce8788b7ea0f58a9e4a495f< 272a9b26c336a295e4e209157fed809706c1b1f7 affected
289fcff4bcdb1dcc0ce8788b7ea0f58a9e4a495f< aaeae6533d77e6ed4def85baec01e2815ebbef61 affected
289fcff4bcdb1dcc0ce8788b7ea0f58a9e4a495f< 8763f8317bb389aded32a32b08f6751cfff657d2 affected
289fcff4bcdb1dcc0ce8788b7ea0f58a9e4a495f< 38c28fe25611099230f0965c925499bfcf46a795 affected
289fcff4bcdb1dcc0ce8788b7ea0f58a9e4a495f< a6e5461f076c2ef63159f18e5cdbd30b50f0bc15 affected
289fcff4bcdb1dcc0ce8788b7ea0f58a9e4a495f< 01af542392b5d41fd659d487015a71f627accce3 affected
… +10 more rows
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I. Basic Information for CVE-2026-31759

Vulnerability Information
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Vulnerability Title
usb: ulpi: fix double free in ulpi_register_interface() error path
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: usb: ulpi: fix double free in ulpi_register_interface() error path When device_register() fails, ulpi_register() calls put_device() on ulpi->dev. The device release callback ulpi_dev_release() drops the OF node reference and frees ulpi, but the current error path in ulpi_register_interface() then calls kfree(ulpi) again, causing a double free. Let put_device() handle the cleanup through ulpi_dev_release() and avoid freeing ulpi again in ulpi_register_interface().
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 ulpi驱动在ulpi_register_interface错误路径中调用put_device后再次释放ulpi，可能导致双重释放。
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 289fcff4bcdb1dcc0ce8788b7ea0f58a9e4a495f ~ 2f70ba9dae13a190673cc3f9b4aad52179738f60 -
Linux Linux 4.2 -

II. Public POCs for CVE-2026-31759

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III. Intelligence Information for CVE-2026-31759

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Patches & Fixes for CVE-2026-31759 (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-2026-31759

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