Bluetooth: L2CAP: Fix possible crash on l2cap_ecred_conn_rsp

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-63975
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-07-19 16:17:16 UTC
Updated2026-07-20 15:16:59 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 8.8 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.002100000 probability, percentile 0.113690000 (date 2026-07-20)

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary8.8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Adjacent
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 15f02b91056253e8cdc592888f431da0731337b8 3c8eaa91eb433c450426539290be4ffe282e9f00 git Not specified
CNA Linux Linux affected 15f02b91056253e8cdc592888f431da0731337b8 ecfed1e0d8efecad6737a0d83e21d2fd021d8c48 git Not specified
CNA Linux Linux affected 15f02b91056253e8cdc592888f431da0731337b8 e6833e737a51db1e5ea0401322acf5e22abd8be6 git Not specified
CNA Linux Linux affected 15f02b91056253e8cdc592888f431da0731337b8 6319b38fe69f56ed95680ade485b957a53fff642 git Not specified
CNA Linux Linux affected 15f02b91056253e8cdc592888f431da0731337b8 291eec1041c918c460dc9702e44edd17794b4a4b git Not specified
CNA Linux Linux affected 15f02b91056253e8cdc592888f431da0731337b8 41e29548b5e8b5e5fcf708786b3bea67cab107fa git Not specified
CNA Linux Linux affected 15f02b91056253e8cdc592888f431da0731337b8 d153b8898c0051eb8b6a083b35cbe304a5886bd5 git Not specified
CNA Linux Linux affected 15f02b91056253e8cdc592888f431da0731337b8 41c2713b204e6cb6a94587bc6bf6935107df5479 git Not specified
CNA Linux Linux affected 5.7 Not specified
CNA Linux Linux unaffected 5.7 semver Not specified
CNA Linux Linux unaffected 5.10.259 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.210 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.176 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.143 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.93 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.35 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.12 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/291eec1041c918c460dc9702e44edd17794b4a4b 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/ecfed1e0d8efecad6737a0d83e21d2fd021d8c48 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/6319b38fe69f56ed95680ade485b957a53fff642 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/41e29548b5e8b5e5fcf708786b3bea67cab107fa 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/d153b8898c0051eb8b6a083b35cbe304a5886bd5 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/41c2713b204e6cb6a94587bc6bf6935107df5479 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/e6833e737a51db1e5ea0401322acf5e22abd8be6 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/3c8eaa91eb433c450426539290be4ffe282e9f00 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
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