CVE-2026-92507

A flaw was found in the Linux kernel's RDMA (Remote Direct Memory Access) core component. A synchronization issue in the ib_dealloc_pd_user() function, when a Protection Domain (PD) is accessed via the netlink path, can lead to a use-after-free vulnerability. This could allow a local attacker to potentially cause a denial of service or execute arbitrary code.

A race condition in RDMA core can leave an ib_pd visible through restrack while ib_dealloc_pd_user() is already destroying internal and vendor specific resources. A local user with access to RDMA device interfaces or RDMA restrack netlink paths may race resource inspection against PD deallocation and reach a use after free condition. For the CVSS the PR:L is used because reliable triggering can be possible with local RDMA access or delegated device access rather than full administrative privileges. The issue is not directly network reachable through normal RDMA traffic and requires local control plane interaction. Impact is at least local denial of service via kernel crash. In the worst case it may allow confidentiality or integrity impact due to kernel use after free and should be reviewed manually.

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.