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CVE-2022-49129 (GCVE-0-2022-49129)

Vulnerability from cvelistv5 – Published: 2025-02-26 01:55 – Updated: 2026-08-12 23:57
VLAI
Title
mt76: mt7921: fix crash when startup fails.
Summary
In the Linux kernel, the following vulnerability has been resolved: mt76: mt7921: fix crash when startup fails. If the nic fails to start, it is possible that the reset_work has already been scheduled. Ensure the work item is canceled so we do not have use-after-free crash in case cleanup is called before the work item is executed. This fixes crash on my x86_64 apu2 when mt7921k radio fails to work. Radio still fails, but OS does not crash.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-02-27 18:17 UTC
CWE
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 0c1ce988460765ece1ba8eacd00533eefb6e666a , < 38fbe806645090c07aa97171f20fc62c3d7d3a98 (git)
Affected: 0c1ce988460765ece1ba8eacd00533eefb6e666a , < c1a5e6002ec441a3b9fb4d048b4b49ae93409a46 (git)
Affected: 0c1ce988460765ece1ba8eacd00533eefb6e666a , < ac1260b661c2ef0d0a56680cdb5672b931b7be8f (git)
Affected: 0c1ce988460765ece1ba8eacd00533eefb6e666a , < 827e7799c61b978fbc2cc9dac66cb62401b2b3f0 (git)
Affected: bea85ed1f508023e1586ede6a622f35fe910857b (git)
Affected: 5.12.16 , < 5.13 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 5.13
Unaffected: 0 , < 5.13 (semver)
Unaffected: 5.15.34 , ≤ 5.15.* (semver)
Unaffected: 5.16.20 , ≤ 5.16.* (semver)
Unaffected: 5.17.3 , ≤ 5.17.* (semver)
Unaffected: 5.18 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
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                  "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                  "version": "3.1"
                }
              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2022-49129",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "total"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2025-02-27T18:17:14.426944Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-416",
                    "description": "CWE-416 Use After Free",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2025-02-27T18:17:15.673Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "drivers/net/wireless/mediatek/mt76/mt7921/main.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "38fbe806645090c07aa97171f20fc62c3d7d3a98",
                  "status": "affected",
                  "version": "0c1ce988460765ece1ba8eacd00533eefb6e666a",
                  "versionType": "git"
                },
                {
                  "lessThan": "c1a5e6002ec441a3b9fb4d048b4b49ae93409a46",
                  "status": "affected",
                  "version": "0c1ce988460765ece1ba8eacd00533eefb6e666a",
                  "versionType": "git"
                },
                {
                  "lessThan": "ac1260b661c2ef0d0a56680cdb5672b931b7be8f",
                  "status": "affected",
                  "version": "0c1ce988460765ece1ba8eacd00533eefb6e666a",
                  "versionType": "git"
                },
                {
                  "lessThan": "827e7799c61b978fbc2cc9dac66cb62401b2b3f0",
                  "status": "affected",
                  "version": "0c1ce988460765ece1ba8eacd00533eefb6e666a",
                  "versionType": "git"
                },
                {
                  "status": "affected",
                  "version": "bea85ed1f508023e1586ede6a622f35fe910857b",
                  "versionType": "git"
                },
                {
                  "lessThan": "5.13",
                  "status": "affected",
                  "version": "5.12.16",
                  "versionType": "semver"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "drivers/net/wireless/mediatek/mt76/mt7921/main.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": "5.15.34",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.16.*",
                  "status": "unaffected",
                  "version": "5.16.20",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.17.*",
                  "status": "unaffected",
                  "version": "5.17.3",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "5.18",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.34",
                      "versionStartIncluding": "5.13",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.16.20",
                      "versionStartIncluding": "5.13",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.17.3",
                      "versionStartIncluding": "5.13",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.18",
                      "versionStartIncluding": "5.13",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionStartIncluding": "5.12.16",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmt76: mt7921: fix crash when startup fails.\n\nIf the nic fails to start, it is possible that the\nreset_work has already been scheduled.  Ensure the\nwork item is canceled so we do not have use-after-free\ncrash in case cleanup is called before the work item\nis executed.\n\nThis fixes crash on my x86_64 apu2 when mt7921k radio\nfails to work.  Radio still fails, but OS does not\ncrash."
            }
          ],
          "metrics": [
            {
              "cvssV3_1": {
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "scenarios": [
                {
                  "lang": "en",
                  "value": "AV:L - The UAF is in the mt7921 PCIe/SDIO WiFi driver\u2019s stop/cleanup path when a pending reset_work races with teardown; exploitation requires local ability to drive the interface/driver lifecycle, not remote packet parsing alone.\nAC:L - Once MCU timeouts or failure paths have scheduled reset_work, a local attacker who can bring the interface down or otherwise trigger stop/cleanup controls the other side of the race and can retry until it wins.\nPR:L - Triggering stop only needs privileges to manage the wireless interface (e.g., NetworkManager/polkit or Android Wi\u2011Fi controls), which are commonly available to ordinary local users and do not require full root.\nUI:N - No separate victim action is required; the attacker (or automated interface management they influence) can initiate the stop/cleanup that races with reset_work.\nS:U - Impact is confined to the local kernel/host authority; this is a standard driver UAF without a VM, IOMMU, or other security-boundary escape.\nC:H - Use-after-free of driver/device state can be leveraged for arbitrary kernel memory disclosure via reclaim and controlled reuse of the freed object.\nI:H - The same UAF enables heap reuse and control-flow hijacking primitives, so integrity impact includes arbitrary kernel write / code execution potential.\nA:H - The bug causes a kernel oops/crash when reset_work runs against already-cleaned-up state, fully disrupting system availability."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-12T23:57:54.463Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/38fbe806645090c07aa97171f20fc62c3d7d3a98"
            },
            {
              "url": "https://git.kernel.org/stable/c/c1a5e6002ec441a3b9fb4d048b4b49ae93409a46"
            },
            {
              "url": "https://git.kernel.org/stable/c/ac1260b661c2ef0d0a56680cdb5672b931b7be8f"
            },
            {
              "url": "https://git.kernel.org/stable/c/827e7799c61b978fbc2cc9dac66cb62401b2b3f0"
            }
          ],
          "title": "mt76: mt7921: fix crash when startup fails.",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2022-49129",
        "datePublished": "2025-02-26T01:55:05.624Z",
        "dateReserved": "2025-02-26T01:49:39.266Z",
        "dateUpdated": "2026-08-12T23:57:54.463Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



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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

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.


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.