Linux Kernel up to 7.1.4 RDMA hns hns_roce_hw_v2_exit memory leak

Summaryinfo

A vulnerability classified as very critical has been found in Linux Kernel up to 7.1.4. Affected is the function hns_roce_hw_v2_exit of the component RDMA hns. Performing a manipulation results in memory leak. This vulnerability is cataloged as CVE-2026-80625. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as very critical has been found in Linux Kernel up to 7.1.4. This affects the function hns_roce_hw_v2_exit of the component RDMA hns. The manipulation with an unknown input leads to a memory leak vulnerability. CWE is classifying the issue as CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: RDMA/hns: Fix memory leak of bonding resources In a corner case of concurrent driver removal and driver reset, bonding resource is first released in hns_roce_hw_v2_exit() during driver removal, and then is allocated again in hns_roce_register_device() during driver reset. This leads to memory leak because the release timing has already passed. This may also lead to a kernel panic as below because of the leaked notifier callback: Call trace: 0xffffa20fccc04978 (P) raw_notifier_call_chain+0x20/0x38 call_netdevice_notifiers_info+0x60/0xb8 netdev_lower_state_changed+0x4c/0xb8 As Sashiko suggested, the teardown order of bonding resources should be inverted to make sure the resources are released when the driver is removed.

The advisory is shared at git.kernel.org. This vulnerability is uniquely identified as CVE-2026-80625 since 08/26/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. Additional levels of successful authentication are needed for exploitation. Technical details are known, but no exploit is available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/28/2026). MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 7.1.5 eliminates this vulnerability. Applying the patch bc4caea7a82bbcf94a34eff7094e7f9b501680ab/c0bd03b850d81a8914168d87ddf7f6ffa58875ef is able to eliminate this problem.

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Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 7.1.0
• 7.1.1
• 7.1.2
• 7.1.3
• 7.1.4

License

• open-source

Website

• Vendor: https://www.kernel.org/

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