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RDMA/rxe: Avoid reprocessing the current packet after the QP enters the error state

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: RDMA/rxe: Avoid reprocessing the current packet after the QP enters the error state When do_complete() finds the QP in the error state it returns RESPST_CHK_RESOURCE. Before commit 49dc9c1f0c7e ("RDMA/rxe: Cleanup reset state handling in rxe_resp.c") this was the flush loop: check_resource() had an error-state branch that fetched each remaining recv WQE and completed it with IB_WC_WR_FLUSH_ERR, without touching the current packet. That commit removed the error-state branch from check_resource() (draining is now done at rxe_receiver() entry) but kept the do_complete() error-state return. As a result, when a QP moves to the error state while a packet is being completed - e.g. an rdma_cm disconnect racing with receive processing - the responder state machine loops back into the request processing chain with the already-completed packet still in hand: check_resource() fetches a fresh recv WQE, execute()/send_data_in() copies the same packet payload again, do_complete() posts another IB_WC_SUCCESS CQE (qp->resp.status is still 0), and control returns to the error-state check. The loop re-executes the same packet once per posted recv WQE (observed: ~1000 duplicate IB_WC_SUCCESS completions of one SEND, one per ~8us, matching the RQ occupancy) until the RQ is exhausted, after which qp->resp.wqe is NULL and send_data_in() dereferences it: BUG: kernel NULL pointer dereference, address: 0000000000000014 Workqueue: rxe_

Announced Source revision 1
Original source ↗

CVE-2026-93107

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-93107

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
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Prerequisites
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Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "49dc9c1f0c7e396654a31a480328fffd902fa494",
        "lessThan": "c319b986a88cedf600c4497cd7814a891b2f9e7c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "49dc9c1f0c7e396654a31a480328fffd902fa494",
        "lessThan": "62a4b48767e06fdd64548450fae2b1ffc6ff5d69",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "49dc9c1f0c7e396654a31a480328fffd902fa494",
        "lessThan": "399713f1f0eac641351c8ceaec0ab8244ddcf78c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "49dc9c1f0c7e396654a31a480328fffd902fa494",
        "lessThan": "0d37e2503efd1069a74be740eadf63ea17c96810",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "49dc9c1f0c7e396654a31a480328fffd902fa494",
        "lessThan": "15ae32c4a3551c4c9da457370bdfdd65d171e512",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/infiniband/sw/rxe/rxe_resp.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6.4"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "6.4",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.110",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.52",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.6",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/infiniband/sw/rxe/rxe_resp.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-93107

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#37832 · Revision 1
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Publisher date
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