Answer in brief
CVE-2024-40992 records a High severity (CVSS 7.5) vulnerability in RDMA/rxe: Fix responder length checking for UD request packets. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=689c5421bfe0eac65526bd97a466b9590a6aad3c <163868ec1f6c610d16da9e458fe1dd7d5de97341 || >=689c5421bfe0eac65526bd97a466b9590a6aad3c <943c94f41dfe36536dc9aaa12c9efdf548ceb996 || >=689c5421bfe0eac65526bd97a466b9590a6aad3c <f67ac0061c7614c1548963d3ef1ee1606efd8636 | 163868ec1f6c610d16da9e458fe1dd7d5de97341, 943c94f41dfe36536dc9aaa12c9efdf548ceb996, f67ac0061c7614c1548963d3ef1ee1606efd8636 |
| Linux/Linuxgeneric | 6.2 | Not reported |
Published upstream
Jul 12, 2024
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Fix responder length checking for UD request packets According to the IBA specification: If a UD request packet is detected with an invalid length, the request shall be an invalid request and it shall be silently dropped by the responder. The responder then waits for a new request packet. commit 689c5421bfe0 ("RDMA/rxe: Fix incorrect responder length checking") defers responder length check for UD QPs in function `copy_data`. But it introduces a regression issue for UD QPs. When the packet size is too large to fit in the receive buffer. `copy_data` will return error code -EINVAL. Then `send_data_in` will return RESPST_ERR_MALFORMED_WQE. UD QP will transfer into ERROR state.
Quoted source text, attributed separately from HOL analysis.