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CVE-2026-46026— net: qrtr: ns: Limit the maximum number of lookups

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命名服务器未限制客户端查找次数，可能导致恶意本地客户端发送大量NEW_LOOKUP消息。

AI Predicted 4.7 Difficulty: Easy EPSS 0.13% · P3

Possible ATT&CK Techniques 1 AI

T1498 · Network Denial of Service

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 0c2204a4ad710d95d348ea006f14ba926e842ffd< bd69e0e8a7643ba5385f19f479e8e3da71f8d495 affected
0c2204a4ad710d95d348ea006f14ba926e842ffd< 91cb30b6bb1880ba0748ca059bef50b8ac13793d affected
0c2204a4ad710d95d348ea006f14ba926e842ffd< 6e3675251fcea06caecc61eb76462467558adfa6 affected
0c2204a4ad710d95d348ea006f14ba926e842ffd< 0dbec101a7076e9b1e4bd1876f7cf07c56ff4ce3 affected
0c2204a4ad710d95d348ea006f14ba926e842ffd< 76adf8f69b0bb3ab20be7c58f5d555027332d113 affected
0c2204a4ad710d95d348ea006f14ba926e842ffd< 20855cef7e659ef84ac73251256fa530819b2346 affected
0c2204a4ad710d95d348ea006f14ba926e842ffd< 2b930bc77e00cb27e1d6e1d497b3b596283465ef affected
0c2204a4ad710d95d348ea006f14ba926e842ffd< 5640227d9a21c6a8be249a10677b832e7f40dc55 affected
… +10 more rows
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I. Basic Information for CVE-2026-46026

Vulnerability Information
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Vulnerability Title
net: qrtr: ns: Limit the maximum number of lookups
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: qrtr: ns: Limit the maximum number of lookups Current code does no bound checking on the number of lookups a client can perform. Though the code restricts the lookups to local clients, there is still a possibility of a malicious local client sending a flood of NEW_LOOKUP messages over the same socket. Fix this issue by limiting the maximum number of lookups to 64 globally. Since the nameserver allows only atmost one local observer, this global lookup count will ensure that the lookups stay within the limit. Note that, limit of 64 is chosen based on the current platform requirements. If requirement changes in the future, this limit can be increased.
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命名服务器未限制客户端查找次数，可能导致恶意本地客户端发送大量NEW_LOOKUP消息。
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 ~ bd69e0e8a7643ba5385f19f479e8e3da71f8d495 -
Linux Linux 5.7 -

II. Public POCs for CVE-2026-46026

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III. Intelligence Information for CVE-2026-46026

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Patches & Fixes for CVE-2026-46026 (6)

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-2026-46026

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