What’s Vulnerable › Vulnerabilities

CVE-2026-46003: net: qrtr: ns: Limit the total number of nodes

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-27 · updated 2026-10-15

Description

In the Linux kernel, the following vulnerability has been resolved: net: qrtr: ns: Limit the total number of nodes Currently, the nameserver doesn't limit the number of nodes it handles. This can be an attack vector if a malicious client starts registering random nodes, leading to memory exhaustion. Hence, limit the maximum number of nodes to 64. Note that, limit of 64 is chosen based on the current platform requirements. If requirement changes in the future, this limit can be increased.

Affected products

• Linux kernel: from 5.7 before 6.6.140; from 6.7 before 6.12.86; from 6.13 before 6.18.27; from 6.19 before 7.0.4 — fixed in 6.12.86, 6.18.27, 6.6.140, 7.0.4

How to fix

Upgrade to a fixed version: Linux kernel 6.12.86, 6.18.27, 6.6.140, 7.0.4. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/27d5e84e810b0849d08b9aec68e48570461ce313
• https://git.kernel.org/stable/c/4665a29c08e1b36bc9db4814f9dde3d23e8fd1b0
• https://git.kernel.org/stable/c/4c46413661431aa60fb134cd4ecdf8beaa39f824
• https://git.kernel.org/stable/c/5cf6d5e5e3b804a44692fbf548a5179442e2e923
• https://git.kernel.org/stable/c/8022876894d09ae485b499058c3357da683bcc5d
• https://git.kernel.org/stable/c/823310645065bd49666e84af689fa95192819f55
• https://git.kernel.org/stable/c/b703ee903b24974aca4bde99c7d25d66309d35dd
• https://git.kernel.org/stable/c/ed29887286aba96d1930f4ddb9f235f6b421073c
• https://cert-portal.siemens.com/productcert/html/ssa-784472.html

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