CVE-2024-26779 (GCVE-0-2024-26779)

Vulnerability from cvelistv5 – Published: 2024-04-03 17:01 – Updated: 2026-08-05 11:27
VLAI
Title
wifi: mac80211: fix race condition on enabling fast-xmit
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211: fix race condition on enabling fast-xmit fast-xmit must only be enabled after the sta has been uploaded to the driver, otherwise it could end up passing the not-yet-uploaded sta via drv_tx calls to the driver, leading to potential crashes because of uninitialized drv_priv data. Add a missing sta->uploaded check and re-check fast xmit after inserting a sta.
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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 2024-04-03 19:22 UTC
CWE
  • CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 17c18bf880b2464851e5a2bca86521affc46c97e , < 76fad1174a0cae6fc857b9f88b261a2e4f07d587 (git)
Affected: 17c18bf880b2464851e5a2bca86521affc46c97e , < 85720b69aef177318f4a18efbcc4302228a340e5 (git)
Affected: 17c18bf880b2464851e5a2bca86521affc46c97e , < 5ffab99e070b9f8ae0cf60c3c3602b84eee818dd (git)
Affected: 17c18bf880b2464851e5a2bca86521affc46c97e , < 88c18fd06608b3adee547102505d715f21075c9d (git)
Affected: 17c18bf880b2464851e5a2bca86521affc46c97e , < eb39bb548bf974acad7bd6780fe11f9e6652d696 (git)
Affected: 17c18bf880b2464851e5a2bca86521affc46c97e , < 54b79d8786964e2f840e8a2ec4a9f9a50f3d4954 (git)
Affected: 17c18bf880b2464851e5a2bca86521affc46c97e , < 281280276b70c822f55ce15b661f6d1d3228aaa9 (git)
Affected: 17c18bf880b2464851e5a2bca86521affc46c97e , < bcbc84af1183c8cf3d1ca9b78540c2185cd85e7f (git)
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Linux Linux Affected: 4.2
Unaffected: 0 , < 4.2 (semver)
Unaffected: 4.19.308 , ≤ 4.19.* (semver)
Unaffected: 5.4.270 , ≤ 5.4.* (semver)
Unaffected: 5.10.211 , ≤ 5.10.* (semver)
Unaffected: 5.15.150 , ≤ 5.15.* (semver)
Unaffected: 6.1.80 , ≤ 6.1.* (semver)
Unaffected: 6.6.19 , ≤ 6.6.* (semver)
Unaffected: 6.7.7 , ≤ 6.7.* (semver)
Unaffected: 6.8 , ≤ * (original_commit_for_fix)
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              },
              {
                "other": {
                  "content": {
                    "id": "CVE-2024-26779",
                    "options": [
                      {
                        "Exploitation": "none"
                      },
                      {
                        "Automatable": "no"
                      },
                      {
                        "Technical Impact": "partial"
                      }
                    ],
                    "role": "CISA Coordinator",
                    "timestamp": "2024-04-03T19:22:50.891620Z",
                    "version": "2.0.3"
                  },
                  "type": "ssvc"
                }
              }
            ],
            "problemTypes": [
              {
                "descriptions": [
                  {
                    "cweId": "CWE-362",
                    "description": "CWE-362 Concurrent Execution using Shared Resource with Improper Synchronization (\u0027Race Condition\u0027)",
                    "lang": "en",
                    "type": "CWE"
                  }
                ]
              }
            ],
            "providerMetadata": {
              "dateUpdated": "2024-05-23T19:01:21.870Z",
              "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
              "shortName": "CISA-ADP"
            },
            "title": "CISA ADP Vulnrichment"
          }
        ],
        "cna": {
          "affected": [
            {
              "defaultStatus": "unaffected",
              "product": "Linux",
              "programFiles": [
                "net/mac80211/sta_info.c",
                "net/mac80211/tx.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "lessThan": "76fad1174a0cae6fc857b9f88b261a2e4f07d587",
                  "status": "affected",
                  "version": "17c18bf880b2464851e5a2bca86521affc46c97e",
                  "versionType": "git"
                },
                {
                  "lessThan": "85720b69aef177318f4a18efbcc4302228a340e5",
                  "status": "affected",
                  "version": "17c18bf880b2464851e5a2bca86521affc46c97e",
                  "versionType": "git"
                },
                {
                  "lessThan": "5ffab99e070b9f8ae0cf60c3c3602b84eee818dd",
                  "status": "affected",
                  "version": "17c18bf880b2464851e5a2bca86521affc46c97e",
                  "versionType": "git"
                },
                {
                  "lessThan": "88c18fd06608b3adee547102505d715f21075c9d",
                  "status": "affected",
                  "version": "17c18bf880b2464851e5a2bca86521affc46c97e",
                  "versionType": "git"
                },
                {
                  "lessThan": "eb39bb548bf974acad7bd6780fe11f9e6652d696",
                  "status": "affected",
                  "version": "17c18bf880b2464851e5a2bca86521affc46c97e",
                  "versionType": "git"
                },
                {
                  "lessThan": "54b79d8786964e2f840e8a2ec4a9f9a50f3d4954",
                  "status": "affected",
                  "version": "17c18bf880b2464851e5a2bca86521affc46c97e",
                  "versionType": "git"
                },
                {
                  "lessThan": "281280276b70c822f55ce15b661f6d1d3228aaa9",
                  "status": "affected",
                  "version": "17c18bf880b2464851e5a2bca86521affc46c97e",
                  "versionType": "git"
                },
                {
                  "lessThan": "bcbc84af1183c8cf3d1ca9b78540c2185cd85e7f",
                  "status": "affected",
                  "version": "17c18bf880b2464851e5a2bca86521affc46c97e",
                  "versionType": "git"
                }
              ]
            },
            {
              "defaultStatus": "affected",
              "product": "Linux",
              "programFiles": [
                "net/mac80211/sta_info.c",
                "net/mac80211/tx.c"
              ],
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "vendor": "Linux",
              "versions": [
                {
                  "status": "affected",
                  "version": "4.2"
                },
                {
                  "lessThan": "4.2",
                  "status": "unaffected",
                  "version": "0",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "4.19.*",
                  "status": "unaffected",
                  "version": "4.19.308",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.4.*",
                  "status": "unaffected",
                  "version": "5.4.270",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.10.*",
                  "status": "unaffected",
                  "version": "5.10.211",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "5.15.*",
                  "status": "unaffected",
                  "version": "5.15.150",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.1.*",
                  "status": "unaffected",
                  "version": "6.1.80",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.6.*",
                  "status": "unaffected",
                  "version": "6.6.19",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "6.7.*",
                  "status": "unaffected",
                  "version": "6.7.7",
                  "versionType": "semver"
                },
                {
                  "lessThanOrEqual": "*",
                  "status": "unaffected",
                  "version": "6.8",
                  "versionType": "original_commit_for_fix"
                }
              ]
            }
          ],
          "cpeApplicability": [
            {
              "nodes": [
                {
                  "cpeMatch": [
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "4.19.308",
                      "versionStartIncluding": "4.2",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.4.270",
                      "versionStartIncluding": "4.2",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.10.211",
                      "versionStartIncluding": "4.2",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "5.15.150",
                      "versionStartIncluding": "4.2",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.1.80",
                      "versionStartIncluding": "4.2",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.6.19",
                      "versionStartIncluding": "4.2",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.7.7",
                      "versionStartIncluding": "4.2",
                      "vulnerable": true
                    },
                    {
                      "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                      "versionEndExcluding": "6.8",
                      "versionStartIncluding": "4.2",
                      "vulnerable": true
                    }
                  ],
                  "negate": false,
                  "operator": "OR"
                }
              ]
            }
          ],
          "descriptions": [
            {
              "lang": "en",
              "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: mac80211: fix race condition on enabling fast-xmit\n\nfast-xmit must only be enabled after the sta has been uploaded to the driver,\notherwise it could end up passing the not-yet-uploaded sta via drv_tx calls\nto the driver, leading to potential crashes because of uninitialized drv_priv\ndata.\nAdd a missing sta-\u003euploaded check and re-check fast xmit after inserting a sta."
            }
          ],
          "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 vulnerable station-insert path is reached by receiving 802.11 mesh beacons/peering frames and QoS-data frames over the air, and the racing `ieee80211_check_fast_xmit()` call comes from the RX softirq handling those frames. Per WiFi frame-injection guidance this is Adjacent, requiring only radio range of a mesh/IBSS node.\nAC:L - The attacker controls both sides of the race \u2014 the beacon that triggers `sta_info_insert_rcu()` (which sleeps in `sta_info_insert_drv_state()`, widening the window to milliseconds) and the PM-bit-toggling QoS-data frames that drive `ieee80211_check_fast_xmit()` from softirq \u2014 and can retry indefinitely by rotating source MACs; the IBSS `drv_sta_state` failure path reaches the same state deterministically.\nPR:N - Open 802.11s mesh with kernel MPM (`__mesh_sta_info_alloc`) and non-RSN IBSS (`ieee80211_ibss_finish_sta`) pre-move the peer to `IEEE80211_STA_AUTHORIZED` before insertion, so station creation happens with zero credentials. The attacker is an unauthenticated wireless peer with no account on the target.\nUI:N - No victim action is needed; a node simply operating in mesh or IBSS mode processes the attacker\u0027s beacons and data frames automatically in the RX path.\nS:U - The corruption occurs in mac80211/driver structures within the kernel\u0027s own security authority, with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - Passing a never-uploaded `ieee80211_sta` to `drv_tx()` makes drivers use zeroed `drv_priv` \u2014 e.g. mt76 WCID index 0, which aliases another station\u0027s hardware key/rate-table entry, so frames are transmitted under the wrong security context \u2014 and the resulting driver-state confusion reads uninitialized/foreign memory, giving a disclosure primitive.\nI:H - This is a state/type confusion on driver-private data: `list_add` on zeroed `list_head`s (ath9k `ath_atx_tid`), indexing per-station driver arrays with an uninitialized index, and in the IBSS unwind case touching resources already freed by `drv_sta_remove`, all of which constitute memory corruption leveragable for write primitives and control-flow hijack.\nA:H - The immediate and near-certain effect is a kernel oops in softirq (NULL/near-NULL dereference from zeroed driver list heads) or a firmware/queue assert, remotely triggerable and repeatable, taking down the wireless node."
                }
              ]
            }
          ],
          "providerMetadata": {
            "dateUpdated": "2026-08-05T11:27:11.945Z",
            "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "shortName": "Linux"
          },
          "references": [
            {
              "url": "https://git.kernel.org/stable/c/76fad1174a0cae6fc857b9f88b261a2e4f07d587"
            },
            {
              "url": "https://git.kernel.org/stable/c/85720b69aef177318f4a18efbcc4302228a340e5"
            },
            {
              "url": "https://git.kernel.org/stable/c/5ffab99e070b9f8ae0cf60c3c3602b84eee818dd"
            },
            {
              "url": "https://git.kernel.org/stable/c/88c18fd06608b3adee547102505d715f21075c9d"
            },
            {
              "url": "https://git.kernel.org/stable/c/eb39bb548bf974acad7bd6780fe11f9e6652d696"
            },
            {
              "url": "https://git.kernel.org/stable/c/54b79d8786964e2f840e8a2ec4a9f9a50f3d4954"
            },
            {
              "url": "https://git.kernel.org/stable/c/281280276b70c822f55ce15b661f6d1d3228aaa9"
            },
            {
              "url": "https://git.kernel.org/stable/c/bcbc84af1183c8cf3d1ca9b78540c2185cd85e7f"
            }
          ],
          "title": "wifi: mac80211: fix race condition on enabling fast-xmit",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2024-26779",
        "datePublished": "2024-04-03T17:01:09.807Z",
        "dateReserved": "2024-02-19T14:20:24.177Z",
        "dateUpdated": "2026-08-05T11:27:11.945Z",
        "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

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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.



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.