{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-68199",
  "modified": "2026-10-09T11:39:44Z",
  "upstream": [
    "CVE-2026-68199"
  ],
  "published": "2026-08-10T12:08:00Z",
  "summary": "wifi: ath6kl: fix OOB access from firmware ADDBA window size",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath6kl: fix OOB access from firmware ADDBA window size\n\naggr_recv_addba_req_evt() logs a debug message when the firmware-supplied\nwin_sz is outside [AGGR_WIN_SZ_MIN, AGGR_WIN_SZ_MAX] but does not\nreturn. The out-of-range win_sz is then used in TID_WINDOW_SZ() to\ncompute a kzalloc size and stored in rxtid->hold_q_sz, leading to\nzero-size or overflowed allocations and subsequent out-of-bounds access.\n\nClean up any previously active aggregation session for the TID first,\nthen return early when win_sz is out of the valid range, instead of\nproceeding with a broken allocation size.",
  "severity": [
    {
      "type": "CVSS_V3",
      "score": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
    }
  ],
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            "linux_commit": "95b85bebbedcaedfa7ca79116ed38b7376fba412",
            "upstream_version": "6.18.33",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.18.42"
          },
          "1:6.18.34-1+rpt1": {
            "linux_commit": "c8c7494100e99ee05b11aaa4f0588a223a63d1af",
            "upstream_version": "6.18.34",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.18.42"
          },
          "1:6.18.39-1+rpt1": {
            "linux_commit": "60ea684a8ace97bb0db1a16e20753bdd6ab371ff",
            "upstream_version": "6.18.39",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.18.42"
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-68199"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/c8e3ca7954d8233fbc54bd370c1827670f43c538"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/f480d9910fcfe326db3a6281df80e83af347193e"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/67bc9af4f41f2bdba20404fbd753b2a1bd6dd352"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/d4558c140782180e2c80a7588a4af9f8675adfc4"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5a65fd4722416061698b0a3277222381efbc4882"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/58c6c8dc2e022e1b4f3dc58725a1ca49ff470f9c"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/cec0a487cf38ac1f9bca240ffe8a94c5014b72f2"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/44126b6994eeb28f2103b638e698f40a1244f327"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-08-19T16:47:12Z",
    "severity": {
      "source": "kernel CNA",
      "cvss_v3_score": 8.8,
      "cvss_v3_severity": "High",
      "scenario": "AV:A - Exploitation requires a malicious WiFi peer (rogue AP or associated client) to trigger ADDBA handling; firmware passes WMI_ADDBA_REQ_EVENTID over the radio link to the ath6kl driver, placing the attacker on the same wireless segment rather than a remote IP network path.\nAC:L - An adjacent attacker can reliably send crafted 802.11 ADDBA requests with out-of-range buffer/window sizes to firmware, which forwards the invalid win_sz to the host; no special memory layout, race, or rare timing is required beyond normal WiFi association.\nPR:N - No local Linux privileges are needed; any associated WiFi peer can induce the malformed ADDBA event. The bug is not reachable via user namespaces or unprivileged local syscalls without controlling the WiFi link/firmware messages.\nUI:N - Once the victim device is associated to WiFi (common on phones, embedded, and IoT), the attacker can send ADDBA and follow-up data frames without any additional victim action beyond routine wireless connectivity.\nS:U - Heap corruption and kernel privilege escalation occur within the same kernel security domain; this is not a VM escape, IOMMU bypass, or cross-authority sandbox breakout.\nC:H - Out-of-bounds access to hold_q allows reading/writing adjacent kernel heap memory (e.g., skb pointers and metadata); OOB kernel heap access is treated as arbitrary memory disclosure potential per kernel CVSS guidance.\nI:H - OOB writes to hold_q entries (struct sk_buff pointers, is_amsdu, seq_no) corrupt kernel heap state and can be leveraged for control-flow hijacking and local privilege escalation, not merely a bounded modification.\nA:H - Invalid win_sz can yield zero-size allocations and hold_q_sz=0 (divide-by-zero in AGGR_WIN_IDX) or inconsistent buffers, causing kernel oops/panic or persistent disruption when aggregation receives subsequent frames."
    }
  }
}