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EUVD-2026-344732

European Vulnerability Database identifier assigned by ENISA

Reserved

2026-10-02 07:57

Assigner

ENISA

Alias of

a CVE record, shown under related vulnerabilities. This identifier carries no description, severity or references of its own: they belong to that CVE.

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{
  "assigner": "ENISA",
  "date_reserved": "2026-10-02T07:57:49.056364+00:00",
  "id": "EUVD-2026-344732"
}

CVE-2022-49416 (GCVE-0-2022-49416)

Vulnerability from cvelistv5 – Published: 2025-02-26 02:12 – Updated: 2026-08-05 08:55

Title

wifi: mac80211: fix use-after-free in chanctx code

Summary

In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: fix use-after-free in chanctx code In ieee80211_vif_use_reserved_context(), when we have an old context and the new context's replace_state is set to IEEE80211_CHANCTX_REPLACE_NONE, we free the old context in ieee80211_vif_use_reserved_reassign(). Therefore, we cannot check the old_ctx anymore, so we should set it to NULL after this point. However, since the new_ctx replace state is clearly not IEEE80211_CHANCTX_REPLACES_OTHER, we're not going to do anything else in this function and can just return to avoid accessing the freed old_ctx.

Severity

8.8 (High)


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

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 18:16 UTC

CWE

CWE-416 - Use After Free

Assigner

Linux mitre root Scorecard

References

9 references

URL	Tags
https://git.kernel.org/stable/c/88cc8f963febe192d…
https://git.kernel.org/stable/c/4ba81e794f0fad623…
https://git.kernel.org/stable/c/9f1e5cc85ad77e52f…
https://git.kernel.org/stable/c/265bec4779a38b65e…
https://git.kernel.org/stable/c/6118bbdf69f4718b0…
https://git.kernel.org/stable/c/b79110f2bf6022e60…
https://git.kernel.org/stable/c/82c8e7bbdd06c7ed5…
https://git.kernel.org/stable/c/4f05a9e15edcdf5b9…
https://git.kernel.org/stable/c/2965c4cdf7ad9ce07…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f , < 88cc8f963febe192d6ded9df7217f92f380b449a (git) Affected: 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f , < 4ba81e794f0fad6234f644c2da1ae14d5b95e1c4 (git) Affected: 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f , < 9f1e5cc85ad77e52f54049a94db0407445ae2a34 (git) Affected: 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f , < 265bec4779a38b65e86a25120370f200822dfa76 (git) Affected: 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f , < 6118bbdf69f4718b02d26bbcf2e497eb66004331 (git) Affected: 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f , < b79110f2bf6022e60e590d2e094728a8eec3e79e (git) Affected: 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f , < 82c8e7bbdd06c7ed58e22450cc5b37f33a25bb2c (git) Affected: 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f , < 4f05a9e15edcdf5b97e0d86ab6ecd5f187289f6c (git) Affected: 5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f , < 2965c4cdf7ad9ce0796fac5e57debb9519ea721e (git)
Linux	Linux	Affected: 3.17 Unaffected: 0 , < 3.17 (semver) Unaffected: 4.9.318 , ≤ 4.9.* (semver) Unaffected: 4.14.283 , ≤ 4.14.* (semver) Unaffected: 4.19.247 , ≤ 4.19.* (semver) Unaffected: 5.4.198 , ≤ 5.4.* (semver) Unaffected: 5.10.121 , ≤ 5.10.* (semver) Unaffected: 5.15.46 , ≤ 5.15.* (semver) Unaffected: 5.17.14 , ≤ 5.17.* (semver) Unaffected: 5.18.3 , ≤ 5.18.* (semver) Unaffected: 5.19 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "LOCAL",
              "availabilityImpact": "HIGH",
              "baseScore": 7.8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "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-2022-49416",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-02-27T18:16:18.774528Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-416",
                "description": "CWE-416 Use After Free",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2025-02-27T18:22:33.196Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/chan.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "88cc8f963febe192d6ded9df7217f92f380b449a",
              "status": "affected",
              "version": "5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f",
              "versionType": "git"
            },
            {
              "lessThan": "4ba81e794f0fad6234f644c2da1ae14d5b95e1c4",
              "status": "affected",
              "version": "5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f",
              "versionType": "git"
            },
            {
              "lessThan": "9f1e5cc85ad77e52f54049a94db0407445ae2a34",
              "status": "affected",
              "version": "5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f",
              "versionType": "git"
            },
            {
              "lessThan": "265bec4779a38b65e86a25120370f200822dfa76",
              "status": "affected",
              "version": "5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f",
              "versionType": "git"
            },
            {
              "lessThan": "6118bbdf69f4718b02d26bbcf2e497eb66004331",
              "status": "affected",
              "version": "5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f",
              "versionType": "git"
            },
            {
              "lessThan": "b79110f2bf6022e60e590d2e094728a8eec3e79e",
              "status": "affected",
              "version": "5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f",
              "versionType": "git"
            },
            {
              "lessThan": "82c8e7bbdd06c7ed58e22450cc5b37f33a25bb2c",
              "status": "affected",
              "version": "5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f",
              "versionType": "git"
            },
            {
              "lessThan": "4f05a9e15edcdf5b97e0d86ab6ecd5f187289f6c",
              "status": "affected",
              "version": "5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f",
              "versionType": "git"
            },
            {
              "lessThan": "2965c4cdf7ad9ce0796fac5e57debb9519ea721e",
              "status": "affected",
              "version": "5bcae31d9cb1ebfad3ad5a3eea04c8cdc329a04f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "net/mac80211/chan.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "3.17"
            },
            {
              "lessThan": "3.17",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.9.*",
              "status": "unaffected",
              "version": "4.9.318",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.14.*",
              "status": "unaffected",
              "version": "4.14.283",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "4.19.*",
              "status": "unaffected",
              "version": "4.19.247",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.4.*",
              "status": "unaffected",
              "version": "5.4.198",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.121",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.46",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.17.*",
              "status": "unaffected",
              "version": "5.17.14",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.18.*",
              "status": "unaffected",
              "version": "5.18.3",
              "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": "4.9.318",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.14.283",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "4.19.247",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.4.198",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.121",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.46",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.17.14",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.18.3",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.19",
                  "versionStartIncluding": "3.17",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix use-after-free in chanctx code\n\nIn ieee80211_vif_use_reserved_context(), when we have an\nold context and the new context\u0027s replace_state is set to\nIEEE80211_CHANCTX_REPLACE_NONE, we free the old context\nin ieee80211_vif_use_reserved_reassign(). Therefore, we\ncannot check the old_ctx anymore, so we should set it to\nNULL after this point.\n\nHowever, since the new_ctx replace state is clearly not\nIEEE80211_CHANCTX_REPLACES_OTHER, we\u0027re not going to do\nanything else in this function and can just return to\navoid accessing the freed old_ctx."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - The UAF is reached when mac80211 finalizes a channel-context reservation during CSA, which an adjacent attacker triggers by sending CSA beacons/action frames to an associated STA (or via IBSS/mesh CSA). WiFi frame processing is Adjacent, not Network.\nAC:L - The free-then-use is deterministic on the REPLACE_NONE reassign path when the vif was the sole user of old_ctx; the attacker controls CSA initiation and does not depend on an uncontrolled race or rare config.\nPR:N - The STA/mlme path processes CSA from the AP (or spoofed management frames) with no privileges on the victim host. No CAP_NET_ADMIN or local account is required for the over-the-air trigger.\nUI:N - Once the device is associated, CSA handling and chswitch_work run automatically with no further user action required to hit the vulnerable finalize path.\nS:U - This is a mac80211 kernel UAF affecting the local kernel authority only; it does not cross a VM, IOMMU, or other security boundary.\nC:H - Use-after-free of the ieee80211_chanctx object enables heap reuse/control of the freed object and therefore arbitrary read primitives under standard UAF exploitation.\nI:H - The same UAF enables heap spraying and corruption of the reused chanctx object, yielding write/control-flow hijack primitives consistent with kernel memory-corruption impact.\nA:H - Use-after-free of a channel context can cause kernel oops/panic (and is treated as High availability impact even when not fully exploited for code execution)."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T08:55:08.558Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/88cc8f963febe192d6ded9df7217f92f380b449a"
        },
        {
          "url": "https://git.kernel.org/stable/c/4ba81e794f0fad6234f644c2da1ae14d5b95e1c4"
        },
        {
          "url": "https://git.kernel.org/stable/c/9f1e5cc85ad77e52f54049a94db0407445ae2a34"
        },
        {
          "url": "https://git.kernel.org/stable/c/265bec4779a38b65e86a25120370f200822dfa76"
        },
        {
          "url": "https://git.kernel.org/stable/c/6118bbdf69f4718b02d26bbcf2e497eb66004331"
        },
        {
          "url": "https://git.kernel.org/stable/c/b79110f2bf6022e60e590d2e094728a8eec3e79e"
        },
        {
          "url": "https://git.kernel.org/stable/c/82c8e7bbdd06c7ed58e22450cc5b37f33a25bb2c"
        },
        {
          "url": "https://git.kernel.org/stable/c/4f05a9e15edcdf5b97e0d86ab6ecd5f187289f6c"
        },
        {
          "url": "https://git.kernel.org/stable/c/2965c4cdf7ad9ce0796fac5e57debb9519ea721e"
        }
      ],
      "title": "wifi: mac80211: fix use-after-free in chanctx code",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49416",
    "datePublished": "2025-02-26T02:12:37.173Z",
    "dateReserved": "2025-02-26T02:08:31.568Z",
    "dateUpdated": "2026-08-05T08:55:08.558Z",
    "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.

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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EUVD-2026-344732

CVE-2022-49416 (GCVE-0-2022-49416)

Tags

Sightings

Nomenclature

Related by attack behaviour