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CVE-2026-45873

📛 CVE Title

netfilter: nft_set_rbtree: check for partial overlaps in anonymous sets

⬇ Download JSON ⚠ View as Threat

Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_set_rbtree: check for partial overlaps in anonymous sets Userspace provides an optimized representation in case intervals are adjacent, where the end element is omitted. The existing partial overlap detection logic skips anonymous set checks on start elements for this reason. However, it is possible to add intervals that overlap to this anonymous where two start elements with the same, eg. A-B, A-C where C < B. start end A B start end A C Restore the check on overlapping start elements to report an overlap.

Overview

State
PUBLISHED
Assigner (CNA)
Linux
CVSS severity
high
CVSS score
CVSS 8.4 / 10 8.4 8.4 / 10
CVSS vector
AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Effective score
8.4 / 10 HIGH source: CNA overview
CWE(s)
—
Reserved
2026-05-13
Published
2026-05-27 12:15 UTC
Last updated
2026-05-27 12:15 UTC
Source
https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/45xxx/CVE-2026-45873.json
Linked Threat
CVE-2026-45873 — CVE-2026-45873

NVD triage scoring NVD CVE 2.0

Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.

NVD published
2026-05-27 14:17:00 UTC
NVD last modified
2026-06-25 21:06:04 UTC
NVD CVSS v3.1
CVSS 5.5 / 10 5.5 5.5 / 10 MEDIUM source: nvd@nist.gov
NVD CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Exploitability subscore
1.8 / 10
Impact subscore
3.6 / 10
EPSS score
0.0016 (probability of exploitation in next 30 days)
EPSS percentile
5.17% vs all CVEs — higher = more likely to be exploited, as of 2026-07-26

NVD / KEV / EPSS data refreshed 2026-07-27 10:27 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.

European Union Vulnerability Database ENISA EUVD

ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.

EUVD ID
EUVD-2026-32339
Assigner
Linux
Published
May 27, 2026, 12:15:52 PM
Updated
May 27, 2026, 12:15:52 PM
EUVD base score
0.0 / 10
EUVD-reported EPSS
0.1600
Vendors
Linux
Products
Linux (patch: 6.1.165)
Linux (5.10.166 <5.10.252)
Linux (181859bdfb9734aca449512fccaee4cacce64aed)
Linux (4aacf3d78424293e318c616016865380b37b9cc5 <7ca5813e1b21ef300e04593f47b073ef3217aac6)
Linux (patch: 0)
Linux (patch: 5.15.202)
Linux (5.4.262 <5.5)
Linux (5.15.91 <5.15.202)
Linux (7ab87a326f20c52ff4d9972052d085be951c704b)
Linux (6.2)
Linux (c9e6978e2725a7d4b6cd23b2facd3f11422c0643 <4780ec142cbb24b794129d3080eee5cac2943ffc)
Linux (patch: 5.10.252)
Linux (4.19.316 <4.20)
Linux (patch: 6.12.75)
Linux (patch: 6.19.4)
Linux (6.1.9 <6.1.165)
Linux (2bf1435fa19d2c58054391b3bba40d5510a5758c <029e5f6a95e905b12d6bc20421be32a01e0eb311)
Linux (c9e6978e2725a7d4b6cd23b2facd3f11422c0643 <05feaf826390fd16f1deb89dd9412def3b2a280f)
Linux (c9e6978e2725a7d4b6cd23b2facd3f11422c0643 <dad14d22dff1a191612acb98facceb303d0524a2)
Linux (c9e6978e2725a7d4b6cd23b2facd3f11422c0643 <e6497e06a102870803a59570d75ed2c36d7e11b3)
Linux (318cb24a4c3fce8140afaf84e4d45fcb76fb280b <f1381ce0a1dd013610985e1c4260908163a427df)
Linux (patch: 6.6.128)
Linux (patch: 7.0)
Linux (c9e6978e2725a7d4b6cd23b2facd3f11422c0643 <f1535d56fc3f6c625b7e0559c006bd0318791bb1)
Linux (patch: 6.18.14)
Aliases
GHSA-9868-rgmf-pm96

ENISA description: In the Linux kernel, the following vulnerability has been resolved: netfilter: nft_set_rbtree: check for partial overlaps in anonymous sets Userspace provides an optimized representation in case intervals are adjacent, where the end element is omitted. The existing partial overlap detection logic skips anonymous set checks on start elements for this reason. However, it is possible to add intervals that overlap to this anonymous where two start elements with the same, eg. A-B, A-C where C < B. start end A B start end A C Restore the check on overlapping start elements to report an overlap.

EUVD references (8)

Affected products (2)
VendorProductVersionsPlatforms
Linux Linux 4aacf3d78424293e318c616016865380b37b9cc5 (affected), 2bf1435fa19d2c58054391b3bba40d5510a5758c (affected), 318cb24a4c3fce8140afaf84e4d45fcb76fb280b (affected), c9e6978e2725a7d4b6cd23b2facd3f11422c0643 (affected), c9e6978e2725a7d4b6cd23b2facd3f11422c0643 (affected), c9e6978e2725a7d4b6cd23b2facd3f11422c0643 (affected), c9e6978e2725a7d4b6cd23b2facd3f11422c0643 (affected), c9e6978e2725a7d4b6cd23b2facd3f11422c0643 (affected), 7ab87a326f20c52ff4d9972052d085be951c704b (affected), 181859bdfb9734aca449512fccaee4cacce64aed (affected), 5.10.166 (affected), 5.15.91 (affected), 6.1.9 (affected), 4.19.316 (affected), 5.4.262 (affected) —
Linux Linux 6.2 (affected), 0 (unaffected), 5.10.252 (unaffected), 5.15.202 (unaffected), 6.1.165 (unaffected), 6.6.128 (unaffected), 6.12.75 (unaffected), 6.18.14 (unaffected), 6.19.4 (unaffected), 7.0 (unaffected) —

Affected products — CPE 2.3 (5) NVD

NVD's normalized CPE 2.3 matchers, used by vendor tools (vulnerability scanners, asset managers) for automated detection. Compare with the CNA's free-text "Affected products" section above.

  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.2:-:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.2:rc6:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.2:rc7:*:*:*:*:*:*
  • cpe:2.3:o:linux:linux_kernel:6.2:rc8:*:*:*:*:*:*

Vendor references (8)

References embedded in the original CVE record by the assigning CNA.

Web references (11)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

NVD-tagged references (8)

Reference list NVD curates from the CNA record, vendor advisories, and third-party reports. The tag chips below are NVD's analyst-assigned categories.

Remediations (18)

Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.

  • Microsoft Releases KB5089573 to Fix Windows 11 Update Issues
    web:cyberpress.org

    Microsoft has rolled out a new cumulative update, KB5089573, for Windows 11 versions 25H2 and 24H2, directly addressing the frustrating installation failures that plagued users during May's Patch Tuesday cycle.

    2026-06-04 00:16 UTC
  • Microsoft Patch Tuesday May 2026 - 120 Vulnerabilities Fixed, Including ...
    web:cybersecuritynews.com

    Microsoft's May 2026 Patch Tuesday lands with a heavy enterprise focus, fixing 120 vulnerabilities across Windows, Office, Azure, developer tools, and Microsoft 365 apps, including 29 remote code execution (RCE) flaws rated Critical.

    2026-06-04 00:16 UTC
  • NVD - Home
    web:nvd.nist.gov

    The NVD is the U.S. government repository of standards based vulnerability management data represented using the Security Content Automation Protocol (SCAP). This data enables automation of vulnerability management, security measurement, and compliance. The NVD includes databases of security checklist references, security-related software flaws, product names, and impact metrics. For ...

    2026-06-04 00:16 UTC
  • Security Update Guide - Microsoft
    web:portal.msrc.microsoft.com

    The Security Update Guide provides information on the latest Microsoft security updates, helping users understand and address potential vulnerabilities effectively.

    2026-06-04 00:16 UTC
  • VMware ESXi 8.0 Update 3d Release Notes
    web:techdocs.broadcom.com

    Patch Category Security Patch Severity Critical Host Reboot Required Yes Virtual Machine Migration or Shutdown Required Yes Affected Hardware N/A Affected Software N/A Affected VIBs Included VMware_bootbank_esxio-update_8..3-.60.24585383 VMware_bootbank_loadesxio_8..3-.60.24585383 PRs Fixed N/A CVE numbers N/A Due to their dependency on the ...

    2026-06-04 00:16 UTC
  • Microsoft Patch Tuesday - May 2026 - Lansweeper
    web:www.lansweeper.com

    Which vulnerabilities, issues, and other things did Microsoft update? Discover what's new using Lansweeper's Patch Tuesday May 2026 summary.

    2026-06-04 00:16 UTC
  • Oracle Critical Patch Update Advisory - April 2026
    web:www.oracle.com

    This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.

    2026-06-04 00:16 UTC
  • "This update broke BitLocker for me" — Windows 11's April patch is ...
    web:www.windowscentral.com

    A faulty BitLocker configuration is forcing some PCs into BitLocker recovery mode after the April 2026 update, but there's a workaround to resolve this issue.

    2026-06-04 00:16 UTC
  • Windows 11 April 2026 Update tested: What's new, improved and fixed
    web:www.windowslatest.com

    Windows 11 April 2026 update adds Narrator Copilot support, faster Settings, File Explorer fixes, and key security improvements.

    2026-06-04 00:16 UTC
  • Patch Tuesday June 2026: Security Updates & CVE Analysis
    web:zecurit.com

    Get the complete breakdown of Microsoft's June 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .

    2026-06-04 00:16 UTC
  • Microsoft and Adobe Patch Tuesday, May 2026 Security Update Review
    web:blog.qualys.com

    May 2026's Patch Tuesday arrives with Microsoft addressing a fresh set of vulnerabilities across its ecosystem, reinforcing the ongoing need for timely patching in an increasingly threat-heavy…

    2026-06-19 02:27 UTC
  • Microsoft Confirms Defender RoguePlanet 0-Day Exploit and Working to ...
    web:cybersecuritynews.com

    Microsoft has officially acknowledged a critical zero-day vulnerability in Microsoft Defender, publicly dubbed "RoguePlanet," and confirmed it is actively developing a security patch to address the flaw.

    2026-06-19 02:27 UTC
  • Nvd - Cve-2026-45673
    web:nvd.nist.gov

    An official website of the United States government Here's how you know

    2026-06-19 02:27 UTC
  • June 9, 2026—KB5094123 (OS Build 17763.8880) - Microsoft Support
    web:support.microsoft.com

    Applies to: Windows Server 2019 This security update includes fixes and quality improvements that are part of the following update: May 12, 2026—KB5087538 (OS Build 17763.8755) The following is a summary of the issues that this update addresses when you install this update. The bold text within the brackets indicates the item or area of the change we are documenting. [Secure Boot] This ...

    2026-06-19 02:27 UTC
  • May 2026 Patch Tuesday: Updates and Analysis | CrowdStrike
    web:www.crowdstrike.com

    Microsoft has released security updates for 130 vulnerabilities, including 30 critical, in its May 2026 Patch Tuesday rollout.

    2026-06-19 02:27 UTC
  • Microsoft working on a fix for RoguePlanet, a flaw that grants full PC ...
    web:www.malwarebytes.com

    Microsoft says it's working on a fix for an unpatched Defender vulnerability that can give attackers the highest level of access on Windows.

    2026-06-19 02:27 UTC
  • Oracle Critical Security Patch Update Advisory - May 2026
    web:www.oracle.com

    This Critical Security Patch Update contains 35 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Security Patch Update and other Oracle Software Security Assurance activities is located at May 2026 Critical Security Patch Update: Executive Summary and Analysis.

    2026-06-19 02:27 UTC
  • Patch Tuesday - June 2026 - Rapid7
    web:www.rapid7.com

    Microsoft is publishing 200 vulnerabilities on June 2026 Patch Tuesday, including an HTTP/2 denial of service vulnerability and an elevation of privilege vulnerability in PowerToys.

    2026-06-19 02:27 UTC

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-45873.json.

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/netfilter/nft_set_rbtree.c"
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              "status": "affected",
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            },
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              "lessThan": "5.15.202",
              "status": "affected",
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              "versionType": "semver"
            },
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              "lessThan": "6.1.165",
              "status": "affected",
              "version": "6.1.9",
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            },
            {
              "lessThan": "4.20",
              "status": "affected",
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            },
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          "versions": [
            {
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            },
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            },
            {
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            {
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            {
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            },
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            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
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            },
            {
              "lessThanOrEqual": "6.18.*",
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            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.4",
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            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
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        }
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      "cpeApplicability": [
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          "nodes": [
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                },
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                },
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                  "vulnerable": true
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              ],
              "negate": false,
              "operator": "OR"
            }
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        }
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetfilter: nft_set_rbtree: check for partial overlaps in anonymous sets\n\nUserspace provides an optimized representation in case intervals are\nadjacent, where the end element is omitted.\n\nThe existing partial overlap detection logic skips anonymous set checks\non start elements for this reason.\n\nHowever, it is possible to add intervals that overlap to this anonymous\nwhere two start elements with the same, eg. A-B, A-C where C < B.\n\n      start     end\n\tA        B\n      start  end\n        A     C\n\nRestore the check on overlapping start elements to report an overlap."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T12:15:52.916Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/7ca5813e1b21ef300e04593f47b073ef3217aac6"
        },
        {
          "url": "https://git.kernel.org/stable/c/029e5f6a95e905b12d6bc20421be32a01e0eb311"
        },
        {
          "url": "https://git.kernel.org/stable/c/f1381ce0a1dd013610985e1c4260908163a427df"
        },
        {
          "url": "https://git.kernel.org/stable/c/f1535d56fc3f6c625b7e0559c006bd0318791bb1"
        },
        {
          "url": "https://git.kernel.org/stable/c/05feaf826390fd16f1deb89dd9412def3b2a280f"
        },
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          "url": "https://git.kernel.org/stable/c/dad14d22dff1a191612acb98facceb303d0524a2"
        },
        {
          "url": "https://git.kernel.org/stable/c/e6497e06a102870803a59570d75ed2c36d7e11b3"
        },
        {
          "url": "https://git.kernel.org/stable/c/4780ec142cbb24b794129d3080eee5cac2943ffc"
        }
      ],
      "title": "netfilter: nft_set_rbtree: check for partial overlaps in anonymous sets",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-45873",
    "datePublished": "2026-05-27T12:15:52.916Z",
    "dateReserved": "2026-05-13T15:03:33.081Z",
    "dateUpdated": "2026-05-27T12:15:52.916Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}