What’s Vulnerable › Vulnerabilities

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

• 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
• Weakness: CWE-401

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().

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/076e4b162d6caba12c229e7f262df5b6881162b0
• https://git.kernel.org/stable/c/154fc7fe3f62c46891c3c4302f4b5b5391c932e6
• https://git.kernel.org/stable/c/25d580a46b079a7963ff024a5195e547baf12b64
• https://git.kernel.org/stable/c/65932f5102bb5377db36c8a4f0c28179a1967a9a
• https://git.kernel.org/stable/c/68efba36446a7774ea5b971257ade049272a07ac
• https://git.kernel.org/stable/c/6c9cca46acb6f22e63f015ea7b2ed6032d2badf5
• https://git.kernel.org/stable/c/a5a454f3364877b22f0e5a165df8b3702ff96ae7
• https://git.kernel.org/stable/c/ff78ed177a66763085e3214d6fbe13ca8f0b3f11
• https://cert-portal.siemens.com/productcert/html/ssa-784472.html

Get alerted when CVE-2026-46038 or the next vulnerability affects your stack