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CVE-2026-46103— can: ucan: fix devres lifetime

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ucan驱动设备资源生命周期管理不当，可能导致内存泄漏。

AI Predicted 3.3 Difficulty: Trivial EPSS 0.11% · P1

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 9f2d3eae88d26c29d96e42983b755940d9169cd9< a90f0815aaa9c629ac4750e7c71c357dd7f231d7 affected
9f2d3eae88d26c29d96e42983b755940d9169cd9< cb2e41e87a2893345859440017e7178bf7a4c70d affected
9f2d3eae88d26c29d96e42983b755940d9169cd9< 3df5b9110ac08f67ccfe382fc172bfee95688eec affected
9f2d3eae88d26c29d96e42983b755940d9169cd9< 4b7d07747400cfd7eff1ba7b8b5a7c8d5a58f705 affected
9f2d3eae88d26c29d96e42983b755940d9169cd9< 10b7b676b78a7bd888d19729b459aad7fc1f428b affected
9f2d3eae88d26c29d96e42983b755940d9169cd9< c524c124e3094d2de12235a513854c03d06a2b58 affected
9f2d3eae88d26c29d96e42983b755940d9169cd9< c0d3ccc6929e4509076df8f30a4fb1dc5018b0ae affected
9f2d3eae88d26c29d96e42983b755940d9169cd9< fed4626501c871890da287bec62a96e52da1af89 affected
… +10 more rows
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I. Basic Information for CVE-2026-46103

Vulnerability Information
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Vulnerability Title
can: ucan: fix devres lifetime
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: can: ucan: fix devres lifetime USB drivers bind to USB interfaces and any device managed resources should have their lifetime tied to the interface rather than parent USB device. This avoids issues like memory leaks when drivers are unbound without their devices being physically disconnected (e.g. on probe deferral or configuration changes). Fix the control message buffer lifetime so that it is released on driver unbind.
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ucan驱动设备资源生命周期管理不当，可能导致内存泄漏。
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 9f2d3eae88d26c29d96e42983b755940d9169cd9 ~ a90f0815aaa9c629ac4750e7c71c357dd7f231d7 -
Linux Linux 4.19 -

II. Public POCs for CVE-2026-46103

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III. Intelligence Information for CVE-2026-46103

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Patches & Fixes for CVE-2026-46103 (8)

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

CVE-2026-45972 9.8 CRITICAL smb: client: fix potential UAF and double free in smb2_open_file()
CVE-2026-45988 9.8 CRITICAL rxrpc: Fix re-decryption of RESPONSE packets
CVE-2026-45898 9.8 CRITICAL RDMA/iwcm: Fix workqueue list corruption by removing work_list
CVE-2026-46039 9.8 CRITICAL rxgk: Fix potential integer overflow in length check
CVE-2026-46043 9.1 CRITICAL RDMA/rxe: Validate pad and ICRC before payload_size() in rxe_rcv
CVE-2026-46056 8.8 HIGH Bluetooth: hci_event: fix potential UAF in SSP passkey handlers
CVE-2026-45945 8.8 HIGH iommu/vt-d: Fix race condition during PASID entry replacement
CVE-2025-71311 8.2 HIGH fs/ntfs3: Initialize new folios before use
CVE-2026-45843 8.2 HIGH slip: bound decode() reads against the compressed packet length
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-2026-45931 7.8 HIGH accel/amdxdna: Hold mm structure across iommu_sva_unbind_device()
CVE-2026-46015 7.8 HIGH tcp: call sk_data_ready() after listener migration
CVE-2026-45929 7.8 HIGH ovpn: fix possible use-after-free in ovpn_net_xmit
CVE-2026-45861 7.8 HIGH gfs2: Fix slab-use-after-free in qd_put
CVE-2026-45862 7.8 HIGH iommu/vt-d: Flush cache for PASID table before using it
CVE-2026-45910 7.8 HIGH RDMA/rxe: Fix race condition in QP timer handlers
CVE-2026-45878 7.8 HIGH drm/amdkfd: Fix watch_id bounds checking in debug address watch v2

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-2026-46103

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