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CVE-2026-46165 (GCVE-0-2026-46165)

Vulnerability from cvelistv5 – Published: 2026-05-28 09:36 – Updated: 2026-06-14 17:59
VLAI
Title
openvswitch: vport: fix self-deadlock on release of tunnel ports
Summary
In the Linux kernel, the following vulnerability has been resolved: openvswitch: vport: fix self-deadlock on release of tunnel ports vports are used concurrently and protected by RCU, so netdev_put() must happen after the RCU grace period. So, either in an RCU call or after the synchronize_net(). The rtnl_delete_link() must happen under RTNL and so can't be executed in RCU context. Calling synchronize_net() while holding RTNL is not a good idea for performance and system stability under load in general, so calling netdev_put() in RCU call is the right solution here. However, when the device is deleted, rtnl_unlock() will call netdev_run_todo() and block until all the references are gone. In the current code this means that we never reach the call_rcu() and the vport is never freed and the reference is never released, causing a self-deadlock on device removal. Fix that by moving the rcu_call() before the rtnl_unlock(), so the scheduled RCU callback will be executed when synchronize_net() is called from the rtnl_unlock()->netdev_run_todo() while the RTNL itself is already released.
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 9d56aced21fb9c104e8a3f3be9b21fbafe448ffc , < 8ae6c15fc473c9ad03b0173330cce9a092c76154 (git)
Affected: 42f0d3d81209654c08ffdde5a34b9b92d2645896 , < c741433f6c8dcdecd1d9549d89053761fd1ea413 (git)
Affected: bbe7bd722bfaea36aab3da6cc60fb4a05c644643 , < 6522d59fb7de55ce0f0f285d962243ddffebb01f (git)
Affected: 98b726ab5e2a4811e27c28e4d041f75bba147eab , < 3df75fff46b1517eb479d8e6b8e3500763715dd0 (git)
Affected: 6931d21f87bc6d657f145798fad0bf077b82486c , < 366c482965c673565ecb8bcfb15d5548f13a6a10 (git)
Affected: 6931d21f87bc6d657f145798fad0bf077b82486c , < aa69918bd418e700309fdd08509dba324fb24296 (git)
Affected: b8c56a3fc5d879c0928f207a756b0f067f06c6a8 (git)
Affected: 6.1.168 , < 6.1.175 (semver)
Affected: 6.6.131 , < 6.6.140 (semver)
Affected: 6.12.80 , < 6.12.88 (semver)
Affected: 6.18.21 , < 6.18.30 (semver)
Affected: 6.19.11 , < 6.20 (semver)
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Linux Linux Affected: 7.0
Unaffected: 0 , < 7.0 (semver)
Unaffected: 6.1.175 , ≤ 6.1.* (semver)
Unaffected: 6.6.140 , ≤ 6.6.* (semver)
Unaffected: 6.12.88 , ≤ 6.12.* (semver)
Unaffected: 6.18.30 , ≤ 6.18.* (semver)
Unaffected: 7.0.7 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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    "redhat_vex": {
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      "source": "Red Hat CSAF VEX",
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      "title": "kernel: openvswitch: vport: fix self-deadlock on release of tunnel ports",
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    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-16T00:12:43Z",
      "cve": "CVE-2026-46165",
      "id": "CVE-2026-46165",
      "initial_release_date": "2026-05-29T01:15:57Z",
      "product_status:first_fixed": "2",
      "product_status:known_not_affected": "270",
      "product_status:recommended": "277",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-46165",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46165.json",
      "version": "12"
    }
  }
}



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Tags
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.