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Bluetooth: L2CAP: Fix possible crash on l2cap_ecred_conn_rsp

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix possible crash on l2cap_ecred_conn_rsp If dcid is received for an already-assigned destination CID the spec requires that both channels to be discarded, but calling l2cap_chan_del may invalidate the tmp cursor created by list_for_each_entry_safe and in fact it is the wrong procedure as the chan->dcid may be assigned previously it really needs to be disconnected. Calling l2cap_chan_clone directly may still lead to l2cap_chan_del so instead schedule l2cap_chan_timeout with delay 0 to close the channel asynchronously.

Announced Source revision 1
Original source ↗

CVE-2026-63975

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-2026-63975

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": "3c8eaa91eb433c450426539290be4ffe282e9f00",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "15f02b91056253e8cdc592888f431da0731337b8",
        "lessThan": "ecfed1e0d8efecad6737a0d83e21d2fd021d8c48",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "15f02b91056253e8cdc592888f431da0731337b8",
        "lessThan": "e6833e737a51db1e5ea0401322acf5e22abd8be6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "15f02b91056253e8cdc592888f431da0731337b8",
        "lessThan": "6319b38fe69f56ed95680ade485b957a53fff642",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "15f02b91056253e8cdc592888f431da0731337b8",
        "lessThan": "291eec1041c918c460dc9702e44edd17794b4a4b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "15f02b91056253e8cdc592888f431da0731337b8",
        "lessThan": "41e29548b5e8b5e5fcf708786b3bea67cab107fa",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "15f02b91056253e8cdc592888f431da0731337b8",
        "lessThan": "d153b8898c0051eb8b6a083b35cbe304a5886bd5",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "15f02b91056253e8cdc592888f431da0731337b8",
        "lessThan": "41c2713b204e6cb6a94587bc6bf6935107df5479",
        "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": "5.10.259",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.210",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.176",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.143",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.93",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.35",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.0.12",
        "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-2026-63975

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#40914 · Revision 1
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Publisher date
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