CVE-2026-45873 (GCVE-0-2026-45873)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:15 – Updated: 2026-05-27 12:15
VLAI
Title
netfilter: nft_set_rbtree: check for partial overlaps in anonymous sets
Summary
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.
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
Linux Linux Affected: 4aacf3d78424293e318c616016865380b37b9cc5 , < 7ca5813e1b21ef300e04593f47b073ef3217aac6 (git)
Affected: 2bf1435fa19d2c58054391b3bba40d5510a5758c , < 029e5f6a95e905b12d6bc20421be32a01e0eb311 (git)
Affected: 318cb24a4c3fce8140afaf84e4d45fcb76fb280b , < f1381ce0a1dd013610985e1c4260908163a427df (git)
Affected: c9e6978e2725a7d4b6cd23b2facd3f11422c0643 , < f1535d56fc3f6c625b7e0559c006bd0318791bb1 (git)
Affected: c9e6978e2725a7d4b6cd23b2facd3f11422c0643 , < 05feaf826390fd16f1deb89dd9412def3b2a280f (git)
Affected: c9e6978e2725a7d4b6cd23b2facd3f11422c0643 , < dad14d22dff1a191612acb98facceb303d0524a2 (git)
Affected: c9e6978e2725a7d4b6cd23b2facd3f11422c0643 , < e6497e06a102870803a59570d75ed2c36d7e11b3 (git)
Affected: c9e6978e2725a7d4b6cd23b2facd3f11422c0643 , < 4780ec142cbb24b794129d3080eee5cac2943ffc (git)
Affected: 7ab87a326f20c52ff4d9972052d085be951c704b (git)
Affected: 181859bdfb9734aca449512fccaee4cacce64aed (git)
Affected: 5.10.166 , < 5.10.252 (semver)
Affected: 5.15.91 , < 5.15.202 (semver)
Affected: 6.1.9 , < 6.1.165 (semver)
Affected: 4.19.316 , < 4.20 (semver)
Affected: 5.4.262 , < 5.5 (semver)
Create a notification for this product.
Linux Linux Affected: 6.2
Unaffected: 0 , < 6.2 (semver)
Unaffected: 5.10.252 , ≤ 5.10.* (semver)
Unaffected: 5.15.202 , ≤ 5.15.* (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.14 , ≤ 6.18.* (semver)
Unaffected: 6.19.4 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
Create a notification for this product.
Show details on NVD website
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                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc7:*:*:*:*:*:*",
                    "matchCriteriaId": "C64BDD9D-C663-4E75-AE06-356EDC392B82",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:6.2:rc8:*:*:*:*:*:*",
                    "matchCriteriaId": "26544390-88E4-41CA-98BF-7BB1E9D4E243",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "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 \u003c 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."
          }
        ],
        "id": "CVE-2026-45873",
        "lastModified": "2026-06-25T21:06:04.977",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 5.5,
                "baseSeverity": "MEDIUM",
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 3.6,
              "source": "nvd@nist.gov",
              "type": "Primary"
            }
          ]
        },
        "published": "2026-05-27T14:17:00.780",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/029e5f6a95e905b12d6bc20421be32a01e0eb311"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/05feaf826390fd16f1deb89dd9412def3b2a280f"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/4780ec142cbb24b794129d3080eee5cac2943ffc"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/7ca5813e1b21ef300e04593f47b073ef3217aac6"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/dad14d22dff1a191612acb98facceb303d0524a2"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/e6497e06a102870803a59570d75ed2c36d7e11b3"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/f1381ce0a1dd013610985e1c4260908163a427df"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/f1535d56fc3f6c625b7e0559c006bd0318791bb1"
          }
        ],
        "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": "Low",
      "current_release_date": "2026-06-27T06:14:49+00:00",
      "cve": "CVE-2026-45873",
      "id": "CVE-2026-45873",
      "initial_release_date": "2026-05-27T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: netfilter: nft_set_rbtree: check for partial overlaps in anonymous sets",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45873.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-01T01:15:04Z",
      "cve": "CVE-2026-45873",
      "id": "CVE-2026-45873",
      "initial_release_date": "2026-05-28T03:57:05Z",
      "product_status:known_affected": "505",
      "product_status:known_not_affected": "229",
      "product_status:recommended": "250",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-45873",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-45873.json",
      "version": "11"
    }
  }
}



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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

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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.



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.