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CVE-2026-46027 (GCVE-0-2026-46027)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:56 – Updated: 2026-08-05 12:29
VLAI
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)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted 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 Create a notification for this product.
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 Create a notification for this product.
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    "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": "2026-09-11T01:13:15Z",
      "cve": "CVE-2026-46027",
      "id": "CVE-2026-46027",
      "initial_release_date": "2026-05-28T03:54:07Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "645",
      "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": "14"
    }
  }
}



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Taxonomy of the tags.





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.


Detection rules are retrieved from Rulezet.


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.