Vulnerability-Lookup

GHSA-72J6-JFMC-MMVR

Vulnerability from github – Published: 2025-10-23 12:31 – Updated: 2025-10-23 12:31

Details

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

net: dsa: qca8k: reset cpu port on MTU change

It was discovered that the Documentation lacks of a fundamental detail on how to correctly change the MAX_FRAME_SIZE of the switch.

In fact if the MAX_FRAME_SIZE is changed while the cpu port is on, the switch panics and cease to send any packet. This cause the mgmt ethernet system to not receive any packet (the slow fallback still works) and makes the device not reachable. To recover from this a switch reset is required.

To correctly handle this, turn off the cpu ports before changing the MAX_FRAME_SIZE and turn on again after the value is applied.

Severity

5.5 (Medium)


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

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{
  "affected": [],
  "aliases": [
    "CVE-2022-49654"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-02-26T07:01:40Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: qca8k: reset cpu port on MTU change\n\nIt was discovered that the Documentation lacks of a fundamental detail\non how to correctly change the MAX_FRAME_SIZE of the switch.\n\nIn fact if the MAX_FRAME_SIZE is changed while the cpu port is on, the\nswitch panics and cease to send any packet. This cause the mgmt ethernet\nsystem to not receive any packet (the slow fallback still works) and\nmakes the device not reachable. To recover from this a switch reset is\nrequired.\n\nTo correctly handle this, turn off the cpu ports before changing the\nMAX_FRAME_SIZE and turn on again after the value is applied.",
  "id": "GHSA-72j6-jfmc-mmvr",
  "modified": "2025-10-23T12:31:16Z",
  "published": "2025-10-23T12:31:16Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49654"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/188c798f3c2554fa0d7147e9b97baf144b817019"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1993f5a06736ada59dd54b50dc96755a38796ee5"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/386228c694bf1e7a7688e44412cb33500b0ac585"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2022-49654 (GCVE-0-2022-49654)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:23 – Updated: 2026-05-11 19:04

Title

net: dsa: qca8k: reset cpu port on MTU change

Summary

In the Linux kernel, the following vulnerability has been resolved: net: dsa: qca8k: reset cpu port on MTU change It was discovered that the Documentation lacks of a fundamental detail on how to correctly change the MAX_FRAME_SIZE of the switch. In fact if the MAX_FRAME_SIZE is changed while the cpu port is on, the switch panics and cease to send any packet. This cause the mgmt ethernet system to not receive any packet (the slow fallback still works) and makes the device not reachable. To recover from this a switch reset is required. To correctly handle this, turn off the cpu ports before changing the MAX_FRAME_SIZE and turn on again after the value is applied.

Severity

No CVSS data available.

Assigner

Linux

References

3 references

URL	Tags
https://git.kernel.org/stable/c/188c798f3c2554fa0…
https://git.kernel.org/stable/c/1993f5a06736ada59…
https://git.kernel.org/stable/c/386228c694bf1e7a7…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: f58d2598cf70d41f73e761b62a114d2e8f94a676 , < 188c798f3c2554fa0d7147e9b97baf144b817019 (git) Affected: f58d2598cf70d41f73e761b62a114d2e8f94a676 , < 1993f5a06736ada59dd54b50dc96755a38796ee5 (git) Affected: f58d2598cf70d41f73e761b62a114d2e8f94a676 , < 386228c694bf1e7a7688e44412cb33500b0ac585 (git)
Linux	Linux	Affected: 5.9 Unaffected: 0 , < 5.9 (semver) Unaffected: 5.15.54 , ≤ 5.15.* (semver) Unaffected: 5.18.11 , ≤ 5.18.* (semver) Unaffected: 5.19 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/dsa/qca8k.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "188c798f3c2554fa0d7147e9b97baf144b817019",
              "status": "affected",
              "version": "f58d2598cf70d41f73e761b62a114d2e8f94a676",
              "versionType": "git"
            },
            {
              "lessThan": "1993f5a06736ada59dd54b50dc96755a38796ee5",
              "status": "affected",
              "version": "f58d2598cf70d41f73e761b62a114d2e8f94a676",
              "versionType": "git"
            },
            {
              "lessThan": "386228c694bf1e7a7688e44412cb33500b0ac585",
              "status": "affected",
              "version": "f58d2598cf70d41f73e761b62a114d2e8f94a676",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/dsa/qca8k.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.9"
            },
            {
              "lessThan": "5.9",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.54",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.18.*",
              "status": "unaffected",
              "version": "5.18.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "5.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.54",
                  "versionStartIncluding": "5.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.18.11",
                  "versionStartIncluding": "5.9",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19",
                  "versionStartIncluding": "5.9",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: dsa: qca8k: reset cpu port on MTU change\n\nIt was discovered that the Documentation lacks of a fundamental detail\non how to correctly change the MAX_FRAME_SIZE of the switch.\n\nIn fact if the MAX_FRAME_SIZE is changed while the cpu port is on, the\nswitch panics and cease to send any packet. This cause the mgmt ethernet\nsystem to not receive any packet (the slow fallback still works) and\nmakes the device not reachable. To recover from this a switch reset is\nrequired.\n\nTo correctly handle this, turn off the cpu ports before changing the\nMAX_FRAME_SIZE and turn on again after the value is applied."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:04:07.843Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/188c798f3c2554fa0d7147e9b97baf144b817019"
        },
        {
          "url": "https://git.kernel.org/stable/c/1993f5a06736ada59dd54b50dc96755a38796ee5"
        },
        {
          "url": "https://git.kernel.org/stable/c/386228c694bf1e7a7688e44412cb33500b0ac585"
        }
      ],
      "title": "net: dsa: qca8k: reset cpu port on MTU change",
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        "engine": "bippy-1.2.0"
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    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49654",
    "datePublished": "2025-02-26T02:23:54.966Z",
    "dateReserved": "2025-02-26T02:21:30.433Z",
    "dateUpdated": "2026-05-11T19:04:07.843Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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

GHSA-72J6-JFMC-MMVR

CVE-2022-49654 (GCVE-0-2022-49654)

Tags

Sightings

Nomenclature