CVE-2026-97442 (GCVE-0-2026-97442)

Vulnerability from cvelistv5 – Published: 2026-09-24 16:03 – Updated: 2026-10-03 10:58
VLAI
Title
wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi In certain cases, hardware might provide packets with a length greater than the maximum native Wi-Fi header length. This can lead to accessing and modifying fields in the header within the ath11k_dp_rx_h_undecap_nwifi() function for the DP_RX_DECAP_TYPE_NATIVE_WIFI decap type and potentially result in invalid data access and memory corruption. Kernel stack is corrupted in: ath11k_dp_rx_h_undecap+0x6b0/0x6b0 [ath11k] Call trace: ath11k_dp_rx_h_mpdu+0x0/0x2e8 [ath11k] ath11k_dp_rx_h_mpdu+0x1e0/0x2e8 [ath11k] ath11k_dp_rx_wbm_err+0x1e0/0x450 [ath11k] ath11k_dp_rx_process_wbm_err+0x2fc/0x460 [ath11k] ath11k_dp_service_srng+0x2e0/0x348 [ath11k] Add a sanity check before processing the SKB to prevent invalid data access in the undecap native Wi-Fi function for the DP_RX_DECAP_TYPE_NATIVE_WIFI decap type. This adapted from the discussion/patch of the ath12k driver [1]. Tested-on: WCN6855 hw2.1 PCI WLAN.HSP.1.1-04685-QCAHSPSWPL_V1_V2_SILICONZ_IOE-1
Severity
8.8 (High)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6641 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: acc79d981c1462b22a7a2cb0d39725f8c01fc425 , < 958cf3696ddc5ccafd3d0b8b0c03d90bcd771c0c (git)
Affected: acc79d981c1462b22a7a2cb0d39725f8c01fc425 , < b4ef30f1d107aae460edf731a7c2d187fbc46a32 (git)
Affected: acc79d981c1462b22a7a2cb0d39725f8c01fc425 , < 1c0a13be76db3c1cf774aa11d9f4c3f8239ac567 (git)
Affected: acc79d981c1462b22a7a2cb0d39725f8c01fc425 , < 00738665c875ab34efa7126ea63c9d70b48ee169 (git)
Affected: acc79d981c1462b22a7a2cb0d39725f8c01fc425 , < 6b471e9aefee9ed73278eb1141e0d8530a56fae9 (git)
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Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 6.1.189 , ≤ 6.1.* (semver)
Unaffected: 6.6.158 , ≤ 6.6.* (semver)
Unaffected: 6.12.111 , ≤ 6.12.* (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/ath/ath11k/dp_rx.c"
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          "versions": [
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              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
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              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
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      ],
      "cpeApplicability": [
        {
          "nodes": [
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              "operator": "OR"
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi\n\nIn certain cases, hardware might provide packets with a\nlength greater than the maximum native Wi-Fi header length.\nThis can lead to accessing and modifying fields in the header\nwithin the ath11k_dp_rx_h_undecap_nwifi() function for the\nDP_RX_DECAP_TYPE_NATIVE_WIFI decap type and\npotentially result in invalid data access and memory corruption.\n\nKernel stack is corrupted in: ath11k_dp_rx_h_undecap+0x6b0/0x6b0 [ath11k]\nCall trace:\n ath11k_dp_rx_h_mpdu+0x0/0x2e8 [ath11k]\n ath11k_dp_rx_h_mpdu+0x1e0/0x2e8 [ath11k]\n ath11k_dp_rx_wbm_err+0x1e0/0x450 [ath11k]\n ath11k_dp_rx_process_wbm_err+0x2fc/0x460 [ath11k]\n ath11k_dp_service_srng+0x2e0/0x348 [ath11k]\n\nAdd a sanity check before processing the SKB to prevent invalid\ndata access in the undecap native Wi-Fi function for the\nDP_RX_DECAP_TYPE_NATIVE_WIFI decap type.\n\nThis adapted from the discussion/patch of the ath12k driver [1].\n\nTested-on: WCN6855 hw2.1 PCI WLAN.HSP.1.1-04685-QCAHSPSWPL_V1_V2_SILICONZ_IOE-1"
        }
      ],
      "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 attacker-controlled bytes are the 802.11 frame_control of a native-WiFi MSDU that reaches ath11k_dp_rx_h_undecap_nwifi() via ath11k_pcic_ext_grp_napi_poll/ath11k_ahb_ext_grp_napi_poll \u2192 ath11k_dp_service_srng \u2192 ath11k_dp_rx_process_wbm_err \u2192 ath11k_dp_rx_wbm_err \u2192 ath11k_dp_rx_h_mpdu \u2192 ath11k_dp_rx_h_undecap. That is over-the-air WiFi, not a routable IP protocol.\nAC:L - ieee80211_hdrlen() is a function of frame_control bits the attacker sets. A 4-address QoS data A-MSDU gives hdr_len 32 (36 with Order), which exceeds decap_hdr[DP_MAX_NWIFI_HDR_LEN] (30). ath11k_frame_mode defaults to ATH11K_HW_TXRX_NATIVE_WIFI, and the attacker retransmits until a non-first subframe takes memcpy(decap_hdr, hdr, hdr_len). No uninfluenced device state.\nPR:N - ath11k_dp_rx_h_null_q_desc() handles WBM DESC_ADDR_ZERO MSDUs with no REO peer/TID queue and still calls ath11k_dp_rx_h_mpdu(); a peer miss falls back to the RX-descriptor encrypt type. That NAPI path has no uid or capability check, so an unauthenticated nearby transmitter whose frame passes the hardware RA filter is enough.\nUI:N - Once the ath11k netdev is up, the injected native-WiFi MSDU is processed in NAPI by ath11k_dp_rx_wbm_err or ath11k_dp_rx_process_msdu. No mount, click, pairing, or other victim action is required at trigger time.\nS:U - The overflow is the 30-byte decap_hdr stack array inside ath11k_dp_rx_h_undecap_nwifi() in the host kernel. It does not escape a VM, bypass the IOMMU, or otherwise leave this security authority.\nC:H - After the overflow, memcpy(skb_push(msdu, hdr_len), decap_hdr, hdr_len) copies the extra 2\u20136 bytes plus adjacent kernel stack into the skb that ath11k_dp_rx_deliver_msdu() hands to ieee80211_rx_napi, which may forward it in AP/mesh mode \u2014 a stack-disclosure primitive.\nI:H - In the !is_first_msdu branch, memcpy(decap_hdr, hdr, hdr_len) writes up to 6 attacker-chosen 802.11 header bytes past the 30-byte stack buffer, overwriting adjacent locals, the stack canary, or saved registers \u2014 a controlled OOB write and control-flow hijack primitive.\nA:H - The smash is observed as \"Kernel stack is corrupted in: ath11k_dp_rx_h_undecap\" on the WBM path (ath11k_dp_rx_process_wbm_err \u2192 ath11k_dp_rx_h_mpdu). That trips __stack_chk_fail or FORTIFY_SOURCE, and skb_pull(hdr_len) on a short MSDU hits skb_under_panic."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-03T10:58:27.589Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/958cf3696ddc5ccafd3d0b8b0c03d90bcd771c0c"
        },
        {
          "url": "https://git.kernel.org/stable/c/b4ef30f1d107aae460edf731a7c2d187fbc46a32"
        },
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          "url": "https://git.kernel.org/stable/c/1c0a13be76db3c1cf774aa11d9f4c3f8239ac567"
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        {
          "url": "https://git.kernel.org/stable/c/00738665c875ab34efa7126ea63c9d70b48ee169"
        },
        {
          "url": "https://git.kernel.org/stable/c/6b471e9aefee9ed73278eb1141e0d8530a56fae9"
        }
      ],
      "title": "wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi",
      "x_generator": {
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  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-97442",
    "datePublished": "2026-09-24T16:03:56.458Z",
    "dateReserved": "2026-09-24T14:53:16.870Z",
    "dateUpdated": "2026-10-03T10:58:27.589Z",
    "state": "PUBLISHED"
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  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-97442",
      "date": "2026-11-13",
      "epss": "0.00254",
      "percentile": "0.1704"
    },
    "microsoft_vex": {
      "current_release_date": "2026-10-22T01:12:44.000Z",
      "cve": "CVE-2026-97442",
      "id": "msrc_CVE-2026-97442",
      "initial_release_date": "2026-09-28T03:08:49.000Z",
      "product_status:known_not_affected": "1",
      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-97442.json",
      "version": "4"
    },
    "nvd": {
      "cve": {
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                "product": "Linux",
                "programFiles": [
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                "product": "Linux",
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                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
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                    "version": "5.7"
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                    "status": "unaffected",
                    "version": "0",
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                    "version": "6.1.189",
                    "versionType": "semver"
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                    "version": "6.18.53",
                    "versionType": "semver"
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            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi\n\nIn certain cases, hardware might provide packets with a\nlength greater than the maximum native Wi-Fi header length.\nThis can lead to accessing and modifying fields in the header\nwithin the ath11k_dp_rx_h_undecap_nwifi() function for the\nDP_RX_DECAP_TYPE_NATIVE_WIFI decap type and\npotentially result in invalid data access and memory corruption.\n\nKernel stack is corrupted in: ath11k_dp_rx_h_undecap+0x6b0/0x6b0 [ath11k]\nCall trace:\n ath11k_dp_rx_h_mpdu+0x0/0x2e8 [ath11k]\n ath11k_dp_rx_h_mpdu+0x1e0/0x2e8 [ath11k]\n ath11k_dp_rx_wbm_err+0x1e0/0x450 [ath11k]\n ath11k_dp_rx_process_wbm_err+0x2fc/0x460 [ath11k]\n ath11k_dp_service_srng+0x2e0/0x348 [ath11k]\n\nAdd a sanity check before processing the SKB to prevent invalid\ndata access in the undecap native Wi-Fi function for the\nDP_RX_DECAP_TYPE_NATIVE_WIFI decap type.\n\nThis adapted from the discussion/patch of the ath12k driver [1].\n\nTested-on: WCN6855 hw2.1 PCI WLAN.HSP.1.1-04685-QCAHSPSWPL_V1_V2_SILICONZ_IOE-1"
          }
        ],
        "id": "CVE-2026-97442",
        "lastModified": "2026-10-03T11:17:55.873",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "ADJACENT_NETWORK",
                "availabilityImpact": "HIGH",
                "baseScore": 8.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "NONE",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
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              "impactScore": 5.9,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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        "published": "2026-09-24T17:17:22.433",
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            "url": "https://git.kernel.org/stable/c/00738665c875ab34efa7126ea63c9d70b48ee169"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/1c0a13be76db3c1cf774aa11d9f4c3f8239ac567"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/6b471e9aefee9ed73278eb1141e0d8530a56fae9"
          },
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            "url": "https://git.kernel.org/stable/c/958cf3696ddc5ccafd3d0b8b0c03d90bcd771c0c"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/b4ef30f1d107aae460edf731a7c2d187fbc46a32"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-11-06T02:19:21+00:00",
      "cve": "CVE-2026-97442",
      "id": "CVE-2026-97442",
      "initial_release_date": "2026-09-24T00:00:00+00:00",
      "product_status:known_affected": "161",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: wifi: ath11k: fix invalid data access in ath11k_dp_rx_h_undecap_nwifi",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97442.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-11-12T00:57:37Z",
      "cve": "CVE-2026-97442",
      "id": "CVE-2026-97442",
      "initial_release_date": "2026-09-24T23:46:00Z",
      "product_status:known_affected": "543",
      "product_status:known_not_affected": "178",
      "product_status:recommended": "149",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-97442",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2026-97442.json",
      "version": "12"
    }
  }
}



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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.
  • 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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

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How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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