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

Vulnerability from cvelistv5 – Published: 2026-09-24 16:03 – Updated: 2026-09-25 12:44
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
References
Impacted products
Vendor Product Version CPE status
Linux Linux 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: 6.12.111 , ≤ 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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          "vendor": "Linux",
          "versions": [
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              "status": "affected",
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              "versionType": "git"
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          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/ath/ath11k/dp_rx.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.7"
            },
            {
              "lessThan": "5.7",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.111",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.53",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
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        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.111",
                  "versionStartIncluding": "5.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.53",
                  "versionStartIncluding": "5.7",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "5.7",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "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": "2026-09-25T12:44:19.799Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/1c0a13be76db3c1cf774aa11d9f4c3f8239ac567"
        },
        {
          "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": {
        "engine": "bippy-1.2.0"
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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": "2026-09-25T12:44:19.799Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-97442",
      "date": "2026-09-25",
      "epss": "0.00239",
      "percentile": "0.13345"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/net/wireless/ath/ath11k/dp_rx.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
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                    "status": "affected",
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                    "versionType": "git"
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                  {
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                    "version": "acc79d981c1462b22a7a2cb0d39725f8c01fc425",
                    "versionType": "git"
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                    "versionType": "git"
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                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "5.7"
                  },
                  {
                    "lessThan": "5.7",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
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                  {
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                    "status": "unaffected",
                    "version": "6.12.111",
                    "versionType": "semver"
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                  {
                    "lessThanOrEqual": "6.18.*",
                    "status": "unaffected",
                    "version": "6.18.53",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "7.2",
                    "versionType": "original_commit_for_fix"
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                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "cveTags": [],
        "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"
          }
        ],
        "id": "CVE-2026-97442",
        "lastModified": "2026-09-25T13:17:27.880",
        "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"
              },
              "exploitabilityScore": 2.8,
              "impactScore": 5.9,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-09-24T17:17:22.433",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "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"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-09-24T23:46:00Z",
      "cve": "CVE-2026-97442",
      "id": "CVE-2026-97442",
      "initial_release_date": "2026-09-24T23:46:00Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-97442",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-97442.json",
      "version": "2"
    }
  }
}



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