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CVE-2026-45930— net: mctp: ensure our nlmsg responses are initialised

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/mctp中RTM_GETNEIGH响应消息的ndmsg数据填充字节未初始化，可能导致未初始化数据泄露。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.13% · P3

Possible ATT&CK Techniques 1 AI

T1135 · Network Share Discovery

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux 583be982d93479ea3d85091b0fd0b01201ede87d< b37da3ac099e145bcd3be82c745a8d335772e3af affected
583be982d93479ea3d85091b0fd0b01201ede87d< c4f840437e7641764de15f2de951ac8335d641f1 affected
583be982d93479ea3d85091b0fd0b01201ede87d< 963537a26fd892f7e414a091f807b44aeee97a7d affected
583be982d93479ea3d85091b0fd0b01201ede87d< 976612471a9e6ead6ceffc241e4d0a1aac90b36a affected
583be982d93479ea3d85091b0fd0b01201ede87d< 54ed418de62a148a655262da682a050fa05f7924 affected
583be982d93479ea3d85091b0fd0b01201ede87d< 6fb6a97c86abb8592158088afaea0eb464cf9de1 affected
583be982d93479ea3d85091b0fd0b01201ede87d< a6a9bc544b675d8b5180f2718ec985ad267b5cbf affected
5.15 affected
… +8 more rows
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I. Basic Information for CVE-2026-45930

Vulnerability Information
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Vulnerability Title
net: mctp: ensure our nlmsg responses are initialised
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: mctp: ensure our nlmsg responses are initialised Syed Faraz Abrar (@farazsth98) from Zellic, and Pumpkin (@u1f383) from DEVCORE Research Team working with Trend Micro Zero Day Initiative report that a RTM_GETNEIGH will return uninitalised data in the pad bytes of the ndmsg data. Ensure we're initialising the netlink data to zero, in the link, addr and neigh response messages.
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/mctp中RTM_GETNEIGH响应消息的ndmsg数据填充字节未初始化，可能导致未初始化数据泄露。
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 583be982d93479ea3d85091b0fd0b01201ede87d ~ b37da3ac099e145bcd3be82c745a8d335772e3af -
Linux Linux 5.15 -

II. Public POCs for CVE-2026-45930

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III. Intelligence Information for CVE-2026-45930

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Patches & Fixes for CVE-2026-45930 (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-2026-45930

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