Skip to content
Heist/ feed
High

Bluetooth: hci_conn: fix the SCO setup context lifetime

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: fix the SCO setup context lifetime hci_setup_sync() queues a conn_handle_t with a NULL destroy callback, so the context is only freed if hci_enhanced_setup_sync() actually runs. An entry that is cancelled instead is leaked, as _hci_cmd_sync_cancel_entry() does not release entry->data when there is no destroy callback, and hci_cmd_sync_clear() cancels every pending entry when the controller is unregistered. The context also stores a bare hci_conn pointer, so the connection can be freed while the work is queued. The dequeue in hci_conn_del() does not cover it either, as it matches on entry->data == conn and entry->data is the wrapper here. Same problem as commit 2f5d635ad590 ("Bluetooth: hci_sync: hold conn in hci_connect_acl/le_sync() callbacks"). Hold the connection and release both from a destroy callback. The submission failure path drops both, since hci_cmd_sync_submit() does not call the destroy callback when it fails to queue.

Announced Source revision 1
Original source ↗

CVE-2026-90255

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-2026-90255

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": "e07a06b4eb417f5271d33ce2240e93c62d98b7b4",
        "lessThan": "37cfec41365c826d5496ef5d00c9e215eee53aa2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e07a06b4eb417f5271d33ce2240e93c62d98b7b4",
        "lessThan": "9a2ba69cebe3fc5a3d4fa8eaaad3c42862723c27",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e07a06b4eb417f5271d33ce2240e93c62d98b7b4",
        "lessThan": "a661de0ee29d0915c5e924edf91d2be2b4d35bae",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e07a06b4eb417f5271d33ce2240e93c62d98b7b4",
        "lessThan": "c1fe3c74a89a7749cba3caa0dd91236049c66116",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e07a06b4eb417f5271d33ce2240e93c62d98b7b4",
        "lessThan": "4d7b1c834d2775b73c65e4888e01f5af8b477fe9",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "e07a06b4eb417f5271d33ce2240e93c62d98b7b4",
        "lessThan": "42de40abe25db9211107af8896d0fd741f10648d",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/bluetooth/hci_conn.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6.1"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "6.1",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "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": [
      "net/bluetooth/hci_conn.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-90255

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#36621 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement