Kernel resource exhaustion via oversized RPC/RDMA Read segments
Published Sep 11, 2026 · Updated Sep 11, 2026
Improper input validation in Linux 7.0 allows attackers to consume kernel resources via oversized RPC/RDMA Read segments. The RPC/RDMA Read-list decoder stores an untrusted rs_length without checking it against the receive context's page budget, and svc_rdma_build_read_segment() allocates a dynamic bvec before checking whether enough rq_pages remain. Reachability requires an RPC/RDMA service to decode a crafted Read list; the overrun path leaves its newly acquired rw context unreleased.
Summary
What happened
Improper input validation in Linux 7.0 allows attackers to consume kernel resources via oversized RPC/RDMA Read segments. The RPC/RDMA Read-list decoder stores an untrusted rs_length without checking it against the receive context's page budget, and svc_rdma_build_read_segment() allocates a dynamic bvec before checking whether enough rq_pages remain. Reachability requires an RPC/RDMA service to decode a crafted Read list; the overrun path leaves its newly acquired rw context unreleased.
The record
- CVE
- CVE-2026-89529
- Published
- Sep 11, 2026
- Updated
- Sep 11, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- T1499.004
- Attack vector
- network
- Privileges
- Unavailable
Timeline
How it unfolded
- Sep 11, 2026CVE publishedPublication date reported by the CVE source.
- Sep 11, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=5ee62b4a91137557ee4b09d1604f1dfd0b4344a8 <5120fe54e0e2f5b62797a432115cc61d61117a5b
- Affected versionversion=5ee62b4a91137557ee4b09d1604f1dfd0b4344a8 <af6f0e06bed818ee7fc8b869915964410020a1c5
- Affected versionversion=7.0
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
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Weakness, pattern, technique
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Technologies
Your stack
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Your stack
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