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

Vulnerability from cvelistv5 – Published: 2025-02-26 02:23 – Updated: 2026-05-11 19:04
VLAI
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
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: f58d2598cf70d41f73e761b62a114d2e8f94a676 , < 188c798f3c2554fa0d7147e9b97baf144b817019 (git)
Affected: f58d2598cf70d41f73e761b62a114d2e8f94a676 , < 1993f5a06736ada59dd54b50dc96755a38796ee5 (git)
Affected: f58d2598cf70d41f73e761b62a114d2e8f94a676 , < 386228c694bf1e7a7688e44412cb33500b0ac585 (git)
Create a notification for this product.
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)
Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "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": [
        {
          "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",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "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",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2022-49654",
      "date": "2026-07-25",
      "epss": "0.00253",
      "percentile": "0.16834"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49654\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-02-26T07:01:40.510\",\"lastModified\":\"2026-06-17T05:18:45.897\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"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.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: net: dsa: qca8k: restablecer el puerto de la CPU al cambiar la MTU Se descubri\u00f3 que la Documentaci\u00f3n carece de un detalle fundamental sobre c\u00f3mo cambiar correctamente el MAX_FRAME_SIZE del conmutador. De hecho, si se cambia MAX_FRAME_SIZE mientras el puerto de la CPU est\u00e1 encendido, el conmutador entra en p\u00e1nico y deja de enviar paquetes. Esto hace que el sistema Ethernet de administraci\u00f3n no reciba ning\u00fan paquete (la recuperaci\u00f3n lenta a\u00fan funciona) y hace que el dispositivo no sea accesible. Para recuperarse de esto, se requiere un reinicio del conmutador. Para gestionar esto correctamente, apague los puertos de la CPU antes de cambiar MAX_FRAME_SIZE y vuelva a encenderlos despu\u00e9s de que se aplique el valor.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/dsa/qca8k.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"f58d2598cf70d41f73e761b62a114d2e8f94a676\",\"lessThan\":\"188c798f3c2554fa0d7147e9b97baf144b817019\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f58d2598cf70d41f73e761b62a114d2e8f94a676\",\"lessThan\":\"1993f5a06736ada59dd54b50dc96755a38796ee5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f58d2598cf70d41f73e761b62a114d2e8f94a676\",\"lessThan\":\"386228c694bf1e7a7688e44412cb33500b0ac585\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/dsa/qca8k.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.9\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.9\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.54\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.18.11\",\"lessThanOrEqual\":\"5.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.19\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"NVD-CWE-noinfo\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.9\",\"versionEndExcluding\":\"5.15.54\",\"matchCriteriaId\":\"708DCCCF-C8E9-43AD-A089-AE3BB40C6369\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"5.16\",\"versionEndExcluding\":\"5.18.11\",\"matchCriteriaId\":\"622F881E-3317-4653-9558-86008C2FBFD2\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc1:*:*:*:*:*:*\",\"matchCriteriaId\":\"A8C30C2D-F82D-4D37-AB48-D76ABFBD5377\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc2:*:*:*:*:*:*\",\"matchCriteriaId\":\"BF8547FC-C849-4F1B-804B-A93AE2F04A92\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:5.19:rc3:*:*:*:*:*:*\",\"matchCriteriaId\":\"F3068028-F453-4A1C-B80F-3F5609ACEF60\"}]}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/188c798f3c2554fa0d7147e9b97baf144b817019\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/1993f5a06736ada59dd54b50dc96755a38796ee5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/386228c694bf1e7a7688e44412cb33500b0ac585\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-30T10:38:35+00:00",
      "cve": "CVE-2022-49654",
      "id": "CVE-2022-49654",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: net: dsa: qca8k: reset cpu port on MTU change",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49654.json",
      "version": "3"
    }
  }
}



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.


Detection rules are retrieved from Rulezet.