net/smc: avoid early lgr access in smc_clc_wait_msg

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Summary

CVECVE-2026-46027
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-27 14:17:21 UTC
Updated2026-06-16 15:54:28 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: net/smc: avoid early lgr access in smc_clc_wait_msg A CLC decline can be received while the handshake is still in an early stage, before the connection has been associated with a link group. The decline handling in smc_clc_wait_msg() updates link-group level sync state for first-contact declines, but that state only exists after link group setup has completed. Guard the link-group update accordingly and keep the per-socket peer diagnosis handling unchanged. This preserves the existing sync_err handling for established link-group contexts and avoids touching link-group state before it is available.

Risk And Classification

Primary CVSS: v3.1 7.5 HIGH from 416baaa9-dc9f-4396-8d5f-8c081fb06d67

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

EPSS: 0.000680000 probability, percentile 0.211320000 (date 2026-06-04)

Problem Types: NVD-CWE-noinfo

VersionSourceTypeScoreSeverityVector
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
3.1CNADECLARED7.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v3.1 Breakdown

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

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 0cfdd8f92cac01afbb12e4500514036a2b78756b 257cdf0c5ced9c0fba8aba501d94b0a5fcef2086 git Not specified
CNA Linux Linux affected 0cfdd8f92cac01afbb12e4500514036a2b78756b 22546729b96fc873b23065dc49e3d73c45cfb874 git Not specified
CNA Linux Linux affected 0cfdd8f92cac01afbb12e4500514036a2b78756b 5eedbfd82c2884e0010fdfb3c9446a6ebcadb691 git Not specified
CNA Linux Linux affected 0cfdd8f92cac01afbb12e4500514036a2b78756b f0858e1d5624bb120b198f2a8528f97a9b0ae069 git Not specified
CNA Linux Linux affected 0cfdd8f92cac01afbb12e4500514036a2b78756b 6180a296ca65b08a81914805cbc0f78da5f10a1f git Not specified
CNA Linux Linux affected 0cfdd8f92cac01afbb12e4500514036a2b78756b ea0b5d0fe96356dce38f98375a57c52a04e13712 git Not specified
CNA Linux Linux affected 0cfdd8f92cac01afbb12e4500514036a2b78756b 83bcf9228b0501694fb2589ed1d142855a2887f2 git Not specified
CNA Linux Linux affected 0cfdd8f92cac01afbb12e4500514036a2b78756b 5a8db80f721deee8e916c2cfdee78decda02ce4f git Not specified
CNA Linux Linux affected 4.11 Not specified
CNA Linux Linux unaffected 4.11 semver Not specified
CNA Linux Linux unaffected 5.10.258 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.209 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.175 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.140 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.86 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.27 6.18.* semver Not specified
CNA Linux Linux unaffected 7.0.4 7.0.* semver Not specified
CNA Linux Linux unaffected 7.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/22546729b96fc873b23065dc49e3d73c45cfb874 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/257cdf0c5ced9c0fba8aba501d94b0a5fcef2086 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/5a8db80f721deee8e916c2cfdee78decda02ce4f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/ea0b5d0fe96356dce38f98375a57c52a04e13712 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/f0858e1d5624bb120b198f2a8528f97a9b0ae069 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/83bcf9228b0501694fb2589ed1d142855a2887f2 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/6180a296ca65b08a81914805cbc0f78da5f10a1f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/5eedbfd82c2884e0010fdfb3c9446a6ebcadb691 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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