CVE-2026-46027 (GCVE-0-2026-46027)
Vulnerability from cvelistv5 – Published: 2026-05-27 12:56 – Updated: 2026-08-05 12:29
VLAI
EPSS
VEX
Title
net/smc: avoid early lgr access in smc_clc_wait_msg
Summary
In 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.
Severity
7.5 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
0cfdd8f92cac01afbb12e4500514036a2b78756b , < 257cdf0c5ced9c0fba8aba501d94b0a5fcef2086
(git)
Affected: 0cfdd8f92cac01afbb12e4500514036a2b78756b , < 22546729b96fc873b23065dc49e3d73c45cfb874 (git) Affected: 0cfdd8f92cac01afbb12e4500514036a2b78756b , < 5eedbfd82c2884e0010fdfb3c9446a6ebcadb691 (git) Affected: 0cfdd8f92cac01afbb12e4500514036a2b78756b , < f0858e1d5624bb120b198f2a8528f97a9b0ae069 (git) Affected: 0cfdd8f92cac01afbb12e4500514036a2b78756b , < 6180a296ca65b08a81914805cbc0f78da5f10a1f (git) Affected: 0cfdd8f92cac01afbb12e4500514036a2b78756b , < ea0b5d0fe96356dce38f98375a57c52a04e13712 (git) Affected: 0cfdd8f92cac01afbb12e4500514036a2b78756b , < 83bcf9228b0501694fb2589ed1d142855a2887f2 (git) Affected: 0cfdd8f92cac01afbb12e4500514036a2b78756b , < 5a8db80f721deee8e916c2cfdee78decda02ce4f (git) |
guessed | |
| Linux | Linux |
Affected:
4.11
Unaffected: 0 , < 4.11 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.140 , ≤ 6.6.* (semver) Unaffected: 6.12.86 , ≤ 6.12.* (semver) Unaffected: 6.18.27 , ≤ 6.18.* (semver) Unaffected: 7.0.4 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
guessed |
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],
"url": "https://git.kernel.org/stable/c/f0858e1d5624bb120b198f2a8528f97a9b0ae069"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Analyzed",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-noinfo"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-07-02T21:31:02+00:00",
"cve": "CVE-2026-46027",
"id": "CVE-2026-46027",
"initial_release_date": "2026-05-27T00:00:00+00:00",
"product_status:known_affected": "260",
"product_status:known_not_affected": "14",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: net/smc: avoid early lgr access in smc_clc_wait_msg",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46027.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-10-01T01:11:43Z",
"cve": "CVE-2026-46027",
"id": "CVE-2026-46027",
"initial_release_date": "2026-05-28T03:54:07Z",
"product_status:known_affected": "647",
"product_status:known_not_affected": "4",
"product_status:recommended": "277",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-46027",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46027.json",
"version": "15"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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