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CVE-2026-46038— net: qrtr: ns: Free the node during ctrl_cmd_bye()

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qrtr命名服务器处理BYE数据包后未释放节点内存，可能导致内存泄漏。

AI Predicted 5.5 Difficulty: Moderate EPSS 0.12% · P2

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 0c2204a4ad710d95d348ea006f14ba926e842ffd< 6c9cca46acb6f22e63f015ea7b2ed6032d2badf5 affected
0c2204a4ad710d95d348ea006f14ba926e842ffd< a5a454f3364877b22f0e5a165df8b3702ff96ae7 affected
0c2204a4ad710d95d348ea006f14ba926e842ffd< 25d580a46b079a7963ff024a5195e547baf12b64 affected
0c2204a4ad710d95d348ea006f14ba926e842ffd< ff78ed177a66763085e3214d6fbe13ca8f0b3f11 affected
0c2204a4ad710d95d348ea006f14ba926e842ffd< 65932f5102bb5377db36c8a4f0c28179a1967a9a affected
0c2204a4ad710d95d348ea006f14ba926e842ffd< 154fc7fe3f62c46891c3c4302f4b5b5391c932e6 affected
0c2204a4ad710d95d348ea006f14ba926e842ffd< 076e4b162d6caba12c229e7f262df5b6881162b0 affected
0c2204a4ad710d95d348ea006f14ba926e842ffd< 68efba36446a7774ea5b971257ade049272a07ac affected
… +10 more rows
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I. Basic Information for CVE-2026-46038

Vulnerability Information
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Vulnerability Title
net: qrtr: ns: Free the node during ctrl_cmd_bye()
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: qrtr: ns: Free the node during ctrl_cmd_bye() A node sends the BYE packet when it is about to go down. So the nameserver should advertise the removal of the node to all remote and local observers and free the node finally. But currently, the nameserver doesn't free the node memory even after processing the BYE packet. This causes the node memory to leak. Hence, remove the node from Xarray list and free the node memory during both success and failure case of ctrl_cmd_bye().
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qrtr命名服务器处理BYE数据包后未释放节点内存，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 0c2204a4ad710d95d348ea006f14ba926e842ffd ~ 6c9cca46acb6f22e63f015ea7b2ed6032d2badf5 -
Linux Linux 5.7 -

II. Public POCs for CVE-2026-46038

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III. Intelligence Information for CVE-2026-46038

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Patches & Fixes for CVE-2026-46038 (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-2026-46039 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-2026-46043 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-2026-45909 7.8 HIGH clk: mediatek: Drop __initconst from gates
CVE-2026-46015 7.8 HIGH tcp: call sk_data_ready() after listener migration
CVE-2026-46036 7.8 HIGH vfio/cdx: Serialize VFIO_DEVICE_SET_IRQS with a per-device mutex
CVE-2026-46062 7.8 HIGH ntfs3: fix integer overflow in run_unpack() volume boundary check
CVE-2026-46065 7.8 HIGH fbdev: defio: Disconnect deferred I/O from the lifetime of struct fb_info
CVE-2026-45878 7.8 HIGH drm/amdkfd: Fix watch_id bounds checking in debug address watch v2
CVE-2026-45894 7.8 HIGH iommu/vt-d: Clear Present bit before tearing down PASID entry

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-2026-46038

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