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Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp l2cap_ecred_reconf_rsp() calls l2cap_chan_del() without holding l2cap_chan_lock(). Every other l2cap_chan_del() caller in the file acquires the lock first. A remote BLE device can send a crafted L2CAP ECRED reconfiguration response to corrupt the channel list while another thread is iterating it. Add l2cap_chan_hold() and l2cap_chan_lock() before l2cap_chan_del(), and l2cap_chan_unlock() and l2cap_chan_put() after, matching the pattern used in l2cap_ecred_conn_rsp() and l2cap_conn_del().

Announced Source revision 1
Original source ↗

CVE-2026-53071

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-2026-53071

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": "15f02b91056253e8cdc592888f431da0731337b8",
        "lessThan": "96dca51715d86559ed6ed8028e5445cecb80f3ae",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "15f02b91056253e8cdc592888f431da0731337b8",
        "lessThan": "330b20ec97916961ee0e6c29c06bc0fa7c96e64c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "15f02b91056253e8cdc592888f431da0731337b8",
        "lessThan": "0ccd75c51f620374086f359e906917676e699a1c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "15f02b91056253e8cdc592888f431da0731337b8",
        "lessThan": "77a853aec710b2fdf41fa298ea3cbc9a4358f917",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "15f02b91056253e8cdc592888f431da0731337b8",
        "lessThan": "fe1188abdae9b7a8199dcdfcf9244d5e5d61eb14",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "15f02b91056253e8cdc592888f431da0731337b8",
        "lessThan": "dc89961b76f12aff47124c1df4bdb32a080f4d0c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "15f02b91056253e8cdc592888f431da0731337b8",
        "lessThan": "5501d055a1ce3c747141e3955ba8cf034d193f3e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "15f02b91056253e8cdc592888f431da0731337b8",
        "lessThan": "42776497cdbc9a665b384a6dcb85f0d4bd927eab",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "net/bluetooth/l2cap_core.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.7"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.7",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.258",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.209",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.175",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.141",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.91",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.33",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.0.10",
        "versionType": "semver",
        "lessThanOrEqual": "7.0.*"
      },
      {
        "status": "unaffected",
        "version": "7.1",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/bluetooth/l2cap_core.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-53071

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#40741 · Revision 1
Added to Heist Feed
Publisher date
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