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net/iucv: fix use-after-free of a severed iucv_path

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: net/iucv: fix use-after-free of a severed iucv_path af_iucv queues not-yet-received message notifications on iucv->message_q, each holding a raw pointer to the connection's iucv_path. When the peer severs the connection, iucv_sever_path() frees that path with iucv_path_free() but leaves the notifications queued. A later recvmsg() drains message_q via iucv_process_message_q() and hands the stale path to message_receive() -- a use-after-free of the freed iucv_path. Drop the queued notifications when the path is severed; once the path is gone they can no longer be received. This also frees the notifications leaked when a socket is closed with messages still queued.

Announced Source revision 1
Original source ↗

CVE-2026-68140

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-2026-68140

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": "f0703c80e5156406ad947cb67fe277725b48080f",
        "lessThan": "5f08c5e50bcb4680069bd3f9edd5728308816ded",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f0703c80e5156406ad947cb67fe277725b48080f",
        "lessThan": "c24faf11bd31bfe0500aca12cbdd5a573a954a5d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f0703c80e5156406ad947cb67fe277725b48080f",
        "lessThan": "99ddb33748698296a6f17b9b34aa3d16a406bb3c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f0703c80e5156406ad947cb67fe277725b48080f",
        "lessThan": "23658b350b4107e8292045c2044983fd426fa15d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f0703c80e5156406ad947cb67fe277725b48080f",
        "lessThan": "a5bbaddf69853117f28173c3f5c8fc14c6b2ec82",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f0703c80e5156406ad947cb67fe277725b48080f",
        "lessThan": "900cd6d8119b7f3ae5c4bf82f922ff5957df43db",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f0703c80e5156406ad947cb67fe277725b48080f",
        "lessThan": "f579582c03ed526281a8450159baf1d35099a85f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f0703c80e5156406ad947cb67fe277725b48080f",
        "lessThan": "be7cc4656eb1f54029610e82d1f0fdd3f9b5ec0a",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/iucv/af_iucv.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "2.6.24"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "2.6.24",
        "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": [
      "net/iucv/af_iucv.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-68140

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#41131 · Revision 1
Added to Heist Feed
Publisher date
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