CVE-2024-40992 RDMA/rxe: Fix responder length checking for UD request packets

2024-07-1212:37:35

Linux

www.cve.org

linux kernel

rdma/rxe

ud request packets

iba specification

responder length checking

cve-2024-40992

EPSS

Percentile

15.9%

JSON

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.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/infiniband/sw/rxe/rxe_resp.c"
    ],
    "versions": [
      {
        "version": "689c5421bfe0",
        "lessThan": "163868ec1f6c",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "689c5421bfe0",
        "lessThan": "943c94f41dfe",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "689c5421bfe0",
        "lessThan": "f67ac0061c76",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/infiniband/sw/rxe/rxe_resp.c"
    ],
    "versions": [
      {
        "version": "6.2",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.2",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.36",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9.7",
        "lessThanOrEqual": "6.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]