Vulnerability-Lookup

GHSA-9JJH-93J4-23F2

Vulnerability from github – Published: 2025-05-01 15:31 – Updated: 2025-05-07 15:31

Details

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

wifi: mac80211: fix general-protection-fault in ieee80211_subif_start_xmit()

When device is running and the interface status is changed, the gpf issue is triggered. The problem triggering process is as follows: Thread A: Thread B ieee80211_runtime_change_iftype() process_one_work() ... ... ieee80211_do_stop() ... ... ... sdata->bss = NULL ... ... ieee80211_subif_start_xmit() ieee80211_multicast_to_unicast //!sdata->bss->multicast_to_unicast cause gpf issue

When the interface status is changed, the sending queue continues to send packets. After the bss is set to NULL, the bss is accessed. As a result, this causes a general-protection-fault issue.

The following is the stack information: general protection fault, probably for non-canonical address 0xdffffc000000002f: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000178-0x000000000000017f] Workqueue: mld mld_ifc_work RIP: 0010:ieee80211_subif_start_xmit+0x25b/0x1310 Call Trace: dev_hard_start_xmit+0x1be/0x990 __dev_queue_xmit+0x2c9a/0x3b60 ip6_finish_output2+0xf92/0x1520 ip6_finish_output+0x6af/0x11e0 ip6_output+0x1ed/0x540 mld_sendpack+0xa09/0xe70 mld_ifc_work+0x71c/0xdb0 process_one_work+0x9bf/0x1710 worker_thread+0x665/0x1080 kthread+0x2e4/0x3a0 ret_from_fork+0x1f/0x30

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-2022-49876"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-476"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2025-05-01T15:16:12Z",
    "severity": "MODERATE"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix general-protection-fault in ieee80211_subif_start_xmit()\n\nWhen device is running and the interface status is changed, the gpf issue\nis triggered. The problem triggering process is as follows:\nThread A:                           Thread B\nieee80211_runtime_change_iftype()   process_one_work()\n    ...                                 ...\n    ieee80211_do_stop()                 ...\n    ...                                 ...\n        sdata-\u003ebss = NULL               ...\n        ...                             ieee80211_subif_start_xmit()\n                                            ieee80211_multicast_to_unicast\n                                    //!sdata-\u003ebss-\u003emulticast_to_unicast\n                                      cause gpf issue\n\nWhen the interface status is changed, the sending queue continues to send\npackets. After the bss is set to NULL, the bss is accessed. As a result,\nthis causes a general-protection-fault issue.\n\nThe following is the stack information:\ngeneral protection fault, probably for non-canonical address\n0xdffffc000000002f: 0000 [#1] PREEMPT SMP KASAN\nKASAN: null-ptr-deref in range [0x0000000000000178-0x000000000000017f]\nWorkqueue: mld mld_ifc_work\nRIP: 0010:ieee80211_subif_start_xmit+0x25b/0x1310\nCall Trace:\n\u003cTASK\u003e\ndev_hard_start_xmit+0x1be/0x990\n__dev_queue_xmit+0x2c9a/0x3b60\nip6_finish_output2+0xf92/0x1520\nip6_finish_output+0x6af/0x11e0\nip6_output+0x1ed/0x540\nmld_sendpack+0xa09/0xe70\nmld_ifc_work+0x71c/0xdb0\nprocess_one_work+0x9bf/0x1710\nworker_thread+0x665/0x1080\nkthread+0x2e4/0x3a0\nret_from_fork+0x1f/0x30\n\u003c/TASK\u003e",
  "id": "GHSA-9jjh-93j4-23f2",
  "modified": "2025-05-07T15:31:25Z",
  "published": "2025-05-01T15:31:50Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2022-49876"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/03eb68c72cee249aeb7af7d04a83c033aca3d6d9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/780854186946e0de2be192ee7fa5125666533b3a"
    }
  ],
  "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-2022-49876 (GCVE-0-2022-49876)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:10 – Updated: 2026-05-11 19:08

Title

wifi: mac80211: fix general-protection-fault in ieee80211_subif_start_xmit()

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: fix general-protection-fault in ieee80211_subif_start_xmit() When device is running and the interface status is changed, the gpf issue is triggered. The problem triggering process is as follows: Thread A: Thread B ieee80211_runtime_change_iftype() process_one_work() ... ... ieee80211_do_stop() ... ... ... sdata->bss = NULL ... ... ieee80211_subif_start_xmit() ieee80211_multicast_to_unicast //!sdata->bss->multicast_to_unicast cause gpf issue When the interface status is changed, the sending queue continues to send packets. After the bss is set to NULL, the bss is accessed. As a result, this causes a general-protection-fault issue. The following is the stack information: general protection fault, probably for non-canonical address 0xdffffc000000002f: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000178-0x000000000000017f] Workqueue: mld mld_ifc_work RIP: 0010:ieee80211_subif_start_xmit+0x25b/0x1310 Call Trace: <TASK> dev_hard_start_xmit+0x1be/0x990 __dev_queue_xmit+0x2c9a/0x3b60 ip6_finish_output2+0xf92/0x1520 ip6_finish_output+0x6af/0x11e0 ip6_output+0x1ed/0x540 mld_sendpack+0xa09/0xe70 mld_ifc_work+0x71c/0xdb0 process_one_work+0x9bf/0x1710 worker_thread+0x665/0x1080 kthread+0x2e4/0x3a0 ret_from_fork+0x1f/0x30 </TASK>

Severity

5.5 (Medium)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-10-01 16:03 UTC

CWE

CWE-476 - NULL Pointer Dereference

Assigner

Linux mitre root

References

2 references

URL	Tags
https://git.kernel.org/stable/c/03eb68c72cee249ae…
https://git.kernel.org/stable/c/780854186946e0de2…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: f856373e2f31ffd340e47e2b00027bd4070f74b3 , < 03eb68c72cee249aeb7af7d04a83c033aca3d6d9 (git) Affected: f856373e2f31ffd340e47e2b00027bd4070f74b3 , < 780854186946e0de2be192ee7fa5125666533b3a (git)
Linux	Linux	Affected: 5.19 Unaffected: 0 , < 5.19 (semver) Unaffected: 6.0.9 , ≤ 6.0.* (semver) Unaffected: 6.1 , ≤ * (original_commit_for_fix)

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "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"
            }
          },
          {
            "other": {
              "content": {
                "id": "CVE-2022-49876",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-10-01T16:03:03.883481Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-476",
                "description": "CWE-476 NULL Pointer Dereference",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-10-01T16:03:06.241Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/tx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "03eb68c72cee249aeb7af7d04a83c033aca3d6d9",
              "status": "affected",
              "version": "f856373e2f31ffd340e47e2b00027bd4070f74b3",
              "versionType": "git"
            },
            {
              "lessThan": "780854186946e0de2be192ee7fa5125666533b3a",
              "status": "affected",
              "version": "f856373e2f31ffd340e47e2b00027bd4070f74b3",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/tx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.19"
            },
            {
              "lessThan": "5.19",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.0.*",
              "status": "unaffected",
              "version": "6.0.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.0.9",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1",
                  "versionStartIncluding": "5.19",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix general-protection-fault in ieee80211_subif_start_xmit()\n\nWhen device is running and the interface status is changed, the gpf issue\nis triggered. The problem triggering process is as follows:\nThread A:                           Thread B\nieee80211_runtime_change_iftype()   process_one_work()\n    ...                                 ...\n    ieee80211_do_stop()                 ...\n    ...                                 ...\n        sdata-\u003ebss = NULL               ...\n        ...                             ieee80211_subif_start_xmit()\n                                            ieee80211_multicast_to_unicast\n                                    //!sdata-\u003ebss-\u003emulticast_to_unicast\n                                      cause gpf issue\n\nWhen the interface status is changed, the sending queue continues to send\npackets. After the bss is set to NULL, the bss is accessed. As a result,\nthis causes a general-protection-fault issue.\n\nThe following is the stack information:\ngeneral protection fault, probably for non-canonical address\n0xdffffc000000002f: 0000 [#1] PREEMPT SMP KASAN\nKASAN: null-ptr-deref in range [0x0000000000000178-0x000000000000017f]\nWorkqueue: mld mld_ifc_work\nRIP: 0010:ieee80211_subif_start_xmit+0x25b/0x1310\nCall Trace:\n\u003cTASK\u003e\ndev_hard_start_xmit+0x1be/0x990\n__dev_queue_xmit+0x2c9a/0x3b60\nip6_finish_output2+0xf92/0x1520\nip6_finish_output+0x6af/0x11e0\nip6_output+0x1ed/0x540\nmld_sendpack+0xa09/0xe70\nmld_ifc_work+0x71c/0xdb0\nprocess_one_work+0x9bf/0x1710\nworker_thread+0x665/0x1080\nkthread+0x2e4/0x3a0\nret_from_fork+0x1f/0x30\n\u003c/TASK\u003e"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-11T19:08:27.233Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/03eb68c72cee249aeb7af7d04a83c033aca3d6d9"
        },
        {
          "url": "https://git.kernel.org/stable/c/780854186946e0de2be192ee7fa5125666533b3a"
        }
      ],
      "title": "wifi: mac80211: fix general-protection-fault in ieee80211_subif_start_xmit()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49876",
    "datePublished": "2025-05-01T14:10:25.040Z",
    "dateReserved": "2025-05-01T14:05:17.238Z",
    "dateUpdated": "2026-05-11T19:08:27.233Z",
    "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.
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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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GHSA-9JJH-93J4-23F2

CVE-2022-49876 (GCVE-0-2022-49876)

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