CVE-2026-72465
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…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.65%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 0.65% probability · 49th percentile
- CISA KEV
- Not listed
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/33db78b1b24fc6a464ae08aa4d2538c5f883eb5e
- https://git.kernel.org/stable/c/41634242140173eabbf54f899f9c70b5c685e786
- https://git.kernel.org/stable/c/469b22376ee73369711ecf2761bd122ef4195963
- https://git.kernel.org/stable/c/7cf332b3d82d73ffceedca6b4a120be074172021
- https://git.kernel.org/stable/c/8be1bb378def94a5cb8f7527a191e476407118ec
- https://git.kernel.org/stable/c/c3a628aab2dc8f5fd7bff86ceaeae64de590e60a
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.