What’s Vulnerable › Vulnerabilities

CVE-2026-97440: net: qrtr: fix node refcount leak on ctrl packet alloc failure

• Severity: unknown
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-24 · updated 2026-10-03

Description

In the Linux kernel, the following vulnerability has been resolved: net: qrtr: fix node refcount leak on ctrl packet alloc failure qrtr_send_resume_tx() calls qrtr_node_lookup() which takes a reference on the returned node. If the subsequent call to qrtr_alloc_ctrl_packet() fails due to memory allocation failure, the function returns -ENOMEM without calling qrtr_node_release() to release the node reference. Add qrtr_node_release(node) before returning on the allocation failure path to properly release the reference.

Affected products

• Linux kernel: 5.6 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3b09ff54114566864eea59020f6b69c5bb325b9d
• https://git.kernel.org/stable/c/477353db343663d5502ca442c6de785d2f23f273
• https://git.kernel.org/stable/c/78d066ecac9ce50441d4affae0df2093c4c3e62e
• https://git.kernel.org/stable/c/9d969c98732a4d42212ec580dd5bbad53f246103
• https://git.kernel.org/stable/c/c3515740174b778d0ee44acc477b51a6478da6b8
• https://git.kernel.org/stable/c/f3e90fbcd2d5ec1632bc2e8cdd1218f56bcb5fcf
• https://git.kernel.org/stable/c/f76a39c45182d9137e053081cee9f2c197404ce6

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