Medium severity · published May 27, 2026
CVE-2026-46026
net: qrtr: ns: Limit the maximum number of lookups
5.5
CVSS
0.1%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.1% · higher than 3% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
5.7 before 6.6.140; 6.7 before 6.12.86; 6.13 before 6.18.27; 6.19 before 7.0.4 · source: NVD
LI
Linux · Linux
0c2204a4ad710d95d348ea006f14ba926e842ffd before bd69e0e8a7643ba5385f19f479e8e3da71f8d495; 0c2204a4ad710d95d348ea006f14ba926e842ffd before 91cb30b6bb1880ba0748ca059bef50b8ac13793d; 0c2204a4ad710d95d348ea006f14ba926e842ffd before 6e3675251fcea06caecc61eb76462467558adfa6; 0c2204a4ad710d95d348ea006f14ba926e842ffd before 0dbec101a7076e9b1e4bd1876f7cf07c56ff4ce3; 0c2204a4ad710d95d348ea006f14ba926e842ffd before 76adf8f69b0bb3ab20be7c58f5d555027332d113; 0c2204a4ad710d95d348ea006f14ba926e842ffd before 20855cef7e659ef84ac73251256fa530819b2346; +3 more · source: vendor
SS
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem · Siemens
0 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-46026
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-46026
Patch
https://git.kernel.org/stable/c/0dbec101a7076e9b1e4bd1876f7cf07c56ff4ce3
Patch
https://git.kernel.org/stable/c/20855cef7e659ef84ac73251256fa530819b2346
Patch
https://git.kernel.org/stable/c/2b930bc77e00cb27e1d6e1d497b3b596283465ef
Patch
https://git.kernel.org/stable/c/5640227d9a21c6a8be249a10677b832e7f40dc55
git.kernel.org
https://git.kernel.org/stable/c/6e3675251fcea06caecc61eb76462467558adfa6
Patch
https://git.kernel.org/stable/c/76adf8f69b0bb3ab20be7c58f5d555027332d113
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