CVE-2026-45847 (GCVE-0-2026-45847)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:15 – Updated: 2026-05-27 12:15
VLAI
Title
net: remove WARN_ON_ONCE when accessing forward path array
Summary
In the Linux kernel, the following vulnerability has been resolved: net: remove WARN_ON_ONCE when accessing forward path array Although unlikely, recent support for IPIP tunnels increases chances of reaching this WARN_ON_ONCE if userspace manages to build a sufficiently long forward path. Remove it.
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: ddb94eafab8b597b05904c8277194ea2d6357fa9 , < 548244c2f542aa0ad49453e9306e715a3877bc44 (git)
Affected: ddb94eafab8b597b05904c8277194ea2d6357fa9 , < dcf9b3c90e5560339649d088836529883fb509f3 (git)
Affected: ddb94eafab8b597b05904c8277194ea2d6357fa9 , < 9464ca7a6e56ad1ebf48b2ad5c16871edfad10c6 (git)
Affected: ddb94eafab8b597b05904c8277194ea2d6357fa9 , < 959ea349c7e2d4edf07b6838ca7e59345fe61a08 (git)
Affected: ddb94eafab8b597b05904c8277194ea2d6357fa9 , < 50422613185d505201167e8bdd2f2700790d5db6 (git)
Affected: ddb94eafab8b597b05904c8277194ea2d6357fa9 , < a78d055ba7c31103ad02f8eceb0c452e154d2660 (git)
Affected: ddb94eafab8b597b05904c8277194ea2d6357fa9 , < 008e7a7c293b30bc43e4368dac6ea3808b75a572 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.13
Unaffected: 0 , < 5.13 (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)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/core/dev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "548244c2f542aa0ad49453e9306e715a3877bc44",
              "status": "affected",
              "version": "ddb94eafab8b597b05904c8277194ea2d6357fa9",
              "versionType": "git"
            },
            {
              "lessThan": "dcf9b3c90e5560339649d088836529883fb509f3",
              "status": "affected",
              "version": "ddb94eafab8b597b05904c8277194ea2d6357fa9",
              "versionType": "git"
            },
            {
              "lessThan": "9464ca7a6e56ad1ebf48b2ad5c16871edfad10c6",
              "status": "affected",
              "version": "ddb94eafab8b597b05904c8277194ea2d6357fa9",
              "versionType": "git"
            },
            {
              "lessThan": "959ea349c7e2d4edf07b6838ca7e59345fe61a08",
              "status": "affected",
              "version": "ddb94eafab8b597b05904c8277194ea2d6357fa9",
              "versionType": "git"
            },
            {
              "lessThan": "50422613185d505201167e8bdd2f2700790d5db6",
              "status": "affected",
              "version": "ddb94eafab8b597b05904c8277194ea2d6357fa9",
              "versionType": "git"
            },
            {
              "lessThan": "a78d055ba7c31103ad02f8eceb0c452e154d2660",
              "status": "affected",
              "version": "ddb94eafab8b597b05904c8277194ea2d6357fa9",
              "versionType": "git"
            },
            {
              "lessThan": "008e7a7c293b30bc43e4368dac6ea3808b75a572",
              "status": "affected",
              "version": "ddb94eafab8b597b05904c8277194ea2d6357fa9",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/core/dev.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.13"
            },
            {
              "lessThan": "5.13",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.202",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.165",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.128",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.202",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.165",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.128",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.75",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.14",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.4",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "5.13",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: remove WARN_ON_ONCE when accessing forward path array\n\nAlthough unlikely, recent support for IPIP tunnels increases chances of\nreaching this WARN_ON_ONCE if userspace manages to build a sufficiently\nlong forward path.\n\nRemove it."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-27T12:15:07.344Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/548244c2f542aa0ad49453e9306e715a3877bc44"
        },
        {
          "url": "https://git.kernel.org/stable/c/dcf9b3c90e5560339649d088836529883fb509f3"
        },
        {
          "url": "https://git.kernel.org/stable/c/9464ca7a6e56ad1ebf48b2ad5c16871edfad10c6"
        },
        {
          "url": "https://git.kernel.org/stable/c/959ea349c7e2d4edf07b6838ca7e59345fe61a08"
        },
        {
          "url": "https://git.kernel.org/stable/c/50422613185d505201167e8bdd2f2700790d5db6"
        },
        {
          "url": "https://git.kernel.org/stable/c/a78d055ba7c31103ad02f8eceb0c452e154d2660"
        },
        {
          "url": "https://git.kernel.org/stable/c/008e7a7c293b30bc43e4368dac6ea3808b75a572"
        }
      ],
      "title": "net: remove WARN_ON_ONCE when accessing forward path array",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-45847",
    "datePublished": "2026-05-27T12:15:07.344Z",
    "dateReserved": "2026-05-13T15:03:33.078Z",
    "dateUpdated": "2026-05-27T12:15:07.344Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-45847",
      "date": "2026-09-30",
      "epss": "0.00162",
      "percentile": "0.04859"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "net/core/dev.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "548244c2f542aa0ad49453e9306e715a3877bc44",
                    "status": "affected",
                    "version": "ddb94eafab8b597b05904c8277194ea2d6357fa9",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "dcf9b3c90e5560339649d088836529883fb509f3",
                    "status": "affected",
                    "version": "ddb94eafab8b597b05904c8277194ea2d6357fa9",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "9464ca7a6e56ad1ebf48b2ad5c16871edfad10c6",
                    "status": "affected",
                    "version": "ddb94eafab8b597b05904c8277194ea2d6357fa9",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "959ea349c7e2d4edf07b6838ca7e59345fe61a08",
                    "status": "affected",
                    "version": "ddb94eafab8b597b05904c8277194ea2d6357fa9",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "50422613185d505201167e8bdd2f2700790d5db6",
                    "status": "affected",
                    "version": "ddb94eafab8b597b05904c8277194ea2d6357fa9",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "a78d055ba7c31103ad02f8eceb0c452e154d2660",
                    "status": "affected",
                    "version": "ddb94eafab8b597b05904c8277194ea2d6357fa9",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "008e7a7c293b30bc43e4368dac6ea3808b75a572",
                    "status": "affected",
                    "version": "ddb94eafab8b597b05904c8277194ea2d6357fa9",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "net/core/dev.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "5.13"
                  },
                  {
                    "lessThan": "5.13",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "5.15.*",
                    "status": "unaffected",
                    "version": "5.15.202",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.165",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.6.*",
                    "status": "unaffected",
                    "version": "6.6.128",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.12.*",
                    "status": "unaffected",
                    "version": "6.12.75",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.18.*",
                    "status": "unaffected",
                    "version": "6.18.14",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.19.*",
                    "status": "unaffected",
                    "version": "6.19.4",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "7.0",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "5A03991A-3AEB-4B4D-987D-1A1007DF71F0",
                    "versionEndExcluding": "5.15.202",
                    "versionStartIncluding": "5.13",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "797C7F46-D0BE-4FB8-A502-C5EF8E6B6654",
                    "versionEndExcluding": "6.1.165",
                    "versionStartIncluding": "5.16",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "851E9353-6C09-4CC9-877E-E09DB164A3C2",
                    "versionEndExcluding": "6.6.128",
                    "versionStartIncluding": "6.2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "BCE16369-98ED-41CF-8995-DFDC10B288D2",
                    "versionEndExcluding": "6.12.75",
                    "versionStartIncluding": "6.7",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "BF463CB7-1F58-4607-B847-77ED23E4B9B7",
                    "versionEndExcluding": "6.18.14",
                    "versionStartIncluding": "6.13",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "672A3E79-EC03-479D-8503-361DFBDC8092",
                    "versionEndExcluding": "6.19.4",
                    "versionStartIncluding": "6.19",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: remove WARN_ON_ONCE when accessing forward path array\n\nAlthough unlikely, recent support for IPIP tunnels increases chances of\nreaching this WARN_ON_ONCE if userspace manages to build a sufficiently\nlong forward path.\n\nRemove it."
          }
        ],
        "id": "CVE-2026-45847",
        "lastModified": "2026-06-25T21:03:49.797",
        "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": "2026-05-27T14:16:56.577",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/008e7a7c293b30bc43e4368dac6ea3808b75a572"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/50422613185d505201167e8bdd2f2700790d5db6"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/548244c2f542aa0ad49453e9306e715a3877bc44"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/9464ca7a6e56ad1ebf48b2ad5c16871edfad10c6"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/959ea349c7e2d4edf07b6838ca7e59345fe61a08"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/a78d055ba7c31103ad02f8eceb0c452e154d2660"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/dcf9b3c90e5560339649d088836529883fb509f3"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-617"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-06-27T16:19:20+00:00",
      "cve": "CVE-2026-45847",
      "id": "CVE-2026-45847",
      "initial_release_date": "2026-05-27T00:00:00+00:00",
      "product_status:known_affected": "198",
      "product_status:known_not_affected": "76",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: remove WARN_ON_ONCE when accessing forward path array",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-45847.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-27T17:01:36Z",
      "cve": "CVE-2026-45847",
      "id": "CVE-2026-45847",
      "initial_release_date": "2026-05-28T03:57:35Z",
      "product_status:known_affected": "202",
      "product_status:known_not_affected": "99",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-45847",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-45847.json",
      "version": "4"
    }
  }
}



Log in or create an account to share your comment.




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.



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.