Vulnerability-Lookup

CVE-2026-43208 (GCVE-0-2026-43208)

Vulnerability from cvelistv5 – Published: 2026-05-06 11:28 – Updated: 2026-05-08 12:41

Title

net: do not pass flow_id to set_rps_cpu()

Summary

In the Linux kernel, the following vulnerability has been resolved: net: do not pass flow_id to set_rps_cpu() Blamed commit made the assumption that the RPS table for each receive queue would have the same size, and that it would not change. Compute flow_id in set_rps_cpu(), do not assume we can use the value computed by get_rps_cpu(). Otherwise we risk out-of-bound access and/or crashes.

Severity ?

9.8 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/5455a232edea6b946…
	https://git.kernel.org/stable/c/ed712dc0d64dee5f0…
	https://git.kernel.org/stable/c/8a8a9fac9efa6423f…

Impacted products

Vendor

Product

Version

Linux

Affected: 48aa30443e52c9666d5cd5e67532e475f212337e , < 5455a232edea6b946b99449f15ca771a8874a5a6 (git)
Affected: 48aa30443e52c9666d5cd5e67532e475f212337e , < ed712dc0d64dee5f0d05e4d8ca57711f8a9c850c (git)
Affected: 48aa30443e52c9666d5cd5e67532e475f212337e , < 8a8a9fac9efa6423fd74938b940cb7d731780718 (git)

Linux

Affected: 6.18
Unaffected: 0 , < 6.18 (semver)
Unaffected: 6.18.16 , ≤ 6.18.* (semver)
Unaffected: 6.19.6 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/core/dev.c"
          ],
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          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "48aa30443e52c9666d5cd5e67532e475f212337e",
              "versionType": "git"
            },
            {
              "lessThan": "ed712dc0d64dee5f0d05e4d8ca57711f8a9c850c",
              "status": "affected",
              "version": "48aa30443e52c9666d5cd5e67532e475f212337e",
              "versionType": "git"
            },
            {
              "lessThan": "8a8a9fac9efa6423fd74938b940cb7d731780718",
              "status": "affected",
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              "versionType": "git"
            }
          ]
        },
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          "programFiles": [
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          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.18"
            },
            {
              "lessThan": "6.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.16",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.6",
              "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": "6.18.16",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19.6",
                  "versionStartIncluding": "6.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0",
                  "versionStartIncluding": "6.18",
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                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: do not pass flow_id to set_rps_cpu()\n\nBlamed commit made the assumption that the RPS table for each receive\nqueue would have the same size, and that it would not change.\n\nCompute flow_id in set_rps_cpu(), do not assume we can use the value\ncomputed by get_rps_cpu(). Otherwise we risk out-of-bound access\nand/or crashes."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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      "providerMetadata": {
        "dateUpdated": "2026-05-08T12:41:16.509Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        },
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        },
        {
          "url": "https://git.kernel.org/stable/c/8a8a9fac9efa6423fd74938b940cb7d731780718"
        }
      ],
      "title": "net: do not pass flow_id to set_rps_cpu()",
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        "engine": "bippy-1.2.0"
      }
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  },
  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43208",
    "datePublished": "2026-05-06T11:28:12.292Z",
    "dateReserved": "2026-05-01T14:12:55.993Z",
    "dateUpdated": "2026-05-08T12:41:16.509Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-05-09",
      "epss": "0.0004",
      "percentile": "0.12251"
    },
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  }
}

FKIE_CVE-2026-43208

Vulnerability from fkie_nvd - Published: 2026-05-06 12:16 - Updated: 2026-05-08 13:16

Severity ?

9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Summary

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5455a232edea6b946b99449f15ca771a8874a5a6
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8a8a9fac9efa6423fd74938b940cb7d731780718
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ed712dc0d64dee5f0d05e4d8ca57711f8a9c850c

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: do not pass flow_id to set_rps_cpu()\n\nBlamed commit made the assumption that the RPS table for each receive\nqueue would have the same size, and that it would not change.\n\nCompute flow_id in set_rps_cpu(), do not assume we can use the value\ncomputed by get_rps_cpu(). Otherwise we risk out-of-bound access\nand/or crashes."
    }
  ],
  "id": "CVE-2026-43208",
  "lastModified": "2026-05-08T13:16:45.370",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 9.8,
          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 5.9,
        "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-05-06T12:16:40.170",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5455a232edea6b946b99449f15ca771a8874a5a6"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8a8a9fac9efa6423fd74938b940cb7d731780718"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/ed712dc0d64dee5f0d05e4d8ca57711f8a9c850c"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}

GHSA-6CQ8-8CQV-FH6C

Vulnerability from github – Published: 2026-05-06 12:30 – Updated: 2026-05-08 15:31

Details

In the Linux kernel, the following vulnerability has been resolved:

net: do not pass flow_id to set_rps_cpu()

Blamed commit made the assumption that the RPS table for each receive queue would have the same size, and that it would not change.

Compute flow_id in set_rps_cpu(), do not assume we can use the value computed by get_rps_cpu(). Otherwise we risk out-of-bound access and/or crashes.

Severity ?

9.8 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-43208"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-06T12:16:40Z",
    "severity": "CRITICAL"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: do not pass flow_id to set_rps_cpu()\n\nBlamed commit made the assumption that the RPS table for each receive\nqueue would have the same size, and that it would not change.\n\nCompute flow_id in set_rps_cpu(), do not assume we can use the value\ncomputed by get_rps_cpu(). Otherwise we risk out-of-bound access\nand/or crashes.",
  "id": "GHSA-6cq8-8cqv-fh6c",
  "modified": "2026-05-08T15:31:17Z",
  "published": "2026-05-06T12:30:33Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-43208"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5455a232edea6b946b99449f15ca771a8874a5a6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/8a8a9fac9efa6423fd74938b940cb7d731780718"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/ed712dc0d64dee5f0d05e4d8ca57711f8a9c850c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

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.

Action not permitted

CVE-2026-43208 (GCVE-0-2026-43208)

FKIE_CVE-2026-43208

GHSA-6CQ8-8CQV-FH6C

Tags

Sightings

Nomenclature