What’s Vulnerable › Vulnerabilities

CVE-2026-90308: RDMA/erdma: Hold QP references for AE and CM processing

• Severity: high (CVSS 7.8 v3.1)
• 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: 2026-09-17 · updated 2026-10-30

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/erdma: Hold QP references for AE and CM processing AE QP fatal events and iWARP CM paths load QPs from dev->qp_xa and then use or reference them outside the xarray lock. erdma_destroy_qp() can drop the destroy-path reference and free QP resources while such a lookup is in flight. Add erdma_qp_get_by_qpn() to acquire a kref under the xarray lock with kref_get_unless_zero(). Remove the QP from the xarray before dropping the destroy-path reference so no new lookup can acquire it while destruction waits for existing users.

Affected products

• Linux: 6.0 — fixed in 7.3

How to fix

Upgrade to a fixed version: Linux 7.3. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/233f1b7fe2980e4e238fe03dd3ceddfd082cb4c8
• https://git.kernel.org/stable/c/6e32f84b63c054e09392153125d7202abab2d14b
• https://git.kernel.org/stable/c/92101d7bd67cf313d65baede27118614a283f6bf
• https://git.kernel.org/stable/c/a52eeff32024f190b3bdc99088c7becccd4fa60b
• https://git.kernel.org/stable/c/c92686867638cda954fdb2bdbac8a75e3aa6eaae
• https://git.kernel.org/stable/c/ec987c0654651036dad6a42f7fa2a6d7c16a3687

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