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IB/mad: Drop unmatched RMPP responses before reassembly

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: IB/mad: Drop unmatched RMPP responses before reassembly Kernel-handled RMPP receive processing starts reassembly for active DATA responses before the response is matched to an outstanding send. The normal match happens later, after ib_process_rmpp_recv_wc() has either assembled a complete message or consumed the segment. That ordering lets an unsolicited response that routes to a kernel RMPP agent by the high TID bits allocate or extend RMPP receive state before the full TID and source address are checked against a real request. A reordered burst can therefore reach the receive-side insertion path even though the response would not match any send. For kernel-handled RMPP DATA responses, require the existing ib_find_send_mad() match before entering RMPP reassembly. The matcher already checks the full TID, management class and source address/GID against the agent wait, backlog and in-flight send lists. If there is no match, drop the response without creating RMPP state. This leaves the RMPP window behavior unchanged and only rejects responses that have no corresponding request.

Announced Source revision 1
Original source ↗

CVE-2026-68425

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-2026-68425

Linux

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

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

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": "fa619a77046bef30478697aba0553991033afb8e",
        "lessThan": "45416c87ebcece1e90f3bc5bc172d106b77c6b69",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fa619a77046bef30478697aba0553991033afb8e",
        "lessThan": "9634fb1f4d404f36a20ffbcb8797369db69b06bb",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fa619a77046bef30478697aba0553991033afb8e",
        "lessThan": "bfb9e8243fd2099d1080d09222964d988f991d9b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fa619a77046bef30478697aba0553991033afb8e",
        "lessThan": "dfa535c94406c03d3f0c869ef3ba5528e395737c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fa619a77046bef30478697aba0553991033afb8e",
        "lessThan": "6e1bd7f590b0ccfee07f7fe1d48b92059bd37d72",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fa619a77046bef30478697aba0553991033afb8e",
        "lessThan": "98d2d468b4faa1fdc68c0c6c238389906ee3490c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fa619a77046bef30478697aba0553991033afb8e",
        "lessThan": "ad9c9ad3204f63a46f0f7de29687a8e512f05e29",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "fa619a77046bef30478697aba0553991033afb8e",
        "lessThan": "d2e52d610b9b09694261632340b801a421e0b0c5",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/infiniband/core/mad.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.13"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.13",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.265",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.216",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.183",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.148",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.101",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.42",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.6",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/infiniband/core/mad.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-68425

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#41722 · Revision 1
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Publisher date
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