CVE-2025-38646 (GCVE-0-2025-38646)
Vulnerability from cvelistv5
Published
2025-08-22 16:00
Modified
2025-08-22 16:00
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: rtw89: avoid NULL dereference when RX problematic packet on unsupported 6 GHz band With a quite rare chance, RX report might be problematic to make SW think a packet is received on 6 GHz band even if the chip does not support 6 GHz band actually. Since SW won't initialize stuffs for unsupported bands, NULL dereference will happen then in the sequence, rtw89_vif_rx_stats_iter() -> rtw89_core_cancel_6ghz_probe_tx(). So, add a check to avoid it. The following is a crash log for this case. BUG: kernel NULL pointer dereference, address: 0000000000000032 #PF: supervisor read access in kernel mode #PF: error_code(0x0000) - not-present page PGD 0 P4D 0 Oops: 0000 [#1] PREEMPT SMP NOPTI CPU: 1 PID: 1907 Comm: irq/131-rtw89_p Tainted: G U 6.6.56-05896-g89f5fb0eb30b #1 (HASH:1400 4) Hardware name: Google Telith/Telith, BIOS Google_Telith.15217.747.0 11/12/2024 RIP: 0010:rtw89_vif_rx_stats_iter+0xd2/0x310 [rtw89_core] Code: 4c 89 7d c8 48 89 55 c0 49 8d 44 24 02 48 89 45 b8 45 31 ff eb 11 41 c6 45 3a 01 41 b7 01 4d 8b 6d 00 4d 39 f5 74 42 8b 43 10 <41> 33 45 32 0f b7 4b 14 66 41 33 4d 36 0f b7 c9 09 c1 74 d8 4d 85 RSP: 0018:ffff9f3080138ca0 EFLAGS: 00010246 RAX: 00000000b8bf5770 RBX: ffff91b5e8c639c0 RCX: 0000000000000011 RDX: ffff91b582de1be8 RSI: 0000000000000000 RDI: ffff91b5e8c639e6 RBP: ffff9f3080138d00 R08: 0000000000000000 R09: 0000000000000000 R10: ffff91b59de70000 R11: ffffffffc069be50 R12: ffff91b5e8c639e4 R13: 0000000000000000 R14: ffff91b5828020b8 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff91b8efa40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000032 CR3: 00000002bf838000 CR4: 0000000000750ee0 PKRU: 55555554 Call Trace: <IRQ> ? __die_body+0x68/0xb0 ? page_fault_oops+0x379/0x3e0 ? exc_page_fault+0x4f/0xa0 ? asm_exc_page_fault+0x22/0x30 ? __pfx_rtw89_vif_rx_stats_iter+0x10/0x10 [rtw89_core (HASH:1400 5)] ? rtw89_vif_rx_stats_iter+0xd2/0x310 [rtw89_core (HASH:1400 5)] __iterate_interfaces+0x59/0x110 [mac80211 (HASH:1400 6)] ? __pfx_rtw89_vif_rx_stats_iter+0x10/0x10 [rtw89_core (HASH:1400 5)] ? __pfx_rtw89_vif_rx_stats_iter+0x10/0x10 [rtw89_core (HASH:1400 5)] ieee80211_iterate_active_interfaces_atomic+0x36/0x50 [mac80211 (HASH:1400 6)] rtw89_core_rx_to_mac80211+0xfd/0x1b0 [rtw89_core (HASH:1400 5)] rtw89_core_rx+0x43a/0x980 [rtw89_core (HASH:1400 5)]
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4b525630729082f026e7030eafccf89e3add7eae
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/77a7a48f87d673a68664bebf044214821decbfda
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/7e04f01bb94fe61c73cc59f0495c3b6c16a83231
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/892b29eab44b1803d2cad8e50f1bc2144ef478cb
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f3527ac15a00916e68ecb495b74dbe6a6c62a06f
Impacted products
Vendor Product Version
Linux Linux Version: c6aa9a9c47252ac7b07ed6d10459027e2f2a2de0
Version: c6aa9a9c47252ac7b07ed6d10459027e2f2a2de0
Version: c6aa9a9c47252ac7b07ed6d10459027e2f2a2de0
Version: c6aa9a9c47252ac7b07ed6d10459027e2f2a2de0
Version: c6aa9a9c47252ac7b07ed6d10459027e2f2a2de0
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/realtek/rtw89/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "892b29eab44b1803d2cad8e50f1bc2144ef478cb",
              "status": "affected",
              "version": "c6aa9a9c47252ac7b07ed6d10459027e2f2a2de0",
              "versionType": "git"
            },
            {
              "lessThan": "77a7a48f87d673a68664bebf044214821decbfda",
              "status": "affected",
              "version": "c6aa9a9c47252ac7b07ed6d10459027e2f2a2de0",
              "versionType": "git"
            },
            {
              "lessThan": "f3527ac15a00916e68ecb495b74dbe6a6c62a06f",
              "status": "affected",
              "version": "c6aa9a9c47252ac7b07ed6d10459027e2f2a2de0",
              "versionType": "git"
            },
            {
              "lessThan": "4b525630729082f026e7030eafccf89e3add7eae",
              "status": "affected",
              "version": "c6aa9a9c47252ac7b07ed6d10459027e2f2a2de0",
              "versionType": "git"
            },
            {
              "lessThan": "7e04f01bb94fe61c73cc59f0495c3b6c16a83231",
              "status": "affected",
              "version": "c6aa9a9c47252ac7b07ed6d10459027e2f2a2de0",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/realtek/rtw89/core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.4"
            },
            {
              "lessThan": "6.4",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.102",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.42",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.15.*",
              "status": "unaffected",
              "version": "6.15.10",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.16.*",
              "status": "unaffected",
              "version": "6.16.1",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.17-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.102",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.42",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.15.10",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.16.1",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.17-rc1",
                  "versionStartIncluding": "6.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw89: avoid NULL dereference when RX problematic packet on unsupported 6 GHz band\n\nWith a quite rare chance, RX report might be problematic to make SW think\na packet is received on 6 GHz band even if the chip does not support 6 GHz\nband actually. Since SW won\u0027t initialize stuffs for unsupported bands, NULL\ndereference will happen then in the sequence, rtw89_vif_rx_stats_iter() -\u003e\nrtw89_core_cancel_6ghz_probe_tx(). So, add a check to avoid it.\n\nThe following is a crash log for this case.\n\n BUG: kernel NULL pointer dereference, address: 0000000000000032\n #PF: supervisor read access in kernel mode\n #PF: error_code(0x0000) - not-present page\n PGD 0 P4D 0\n Oops: 0000 [#1] PREEMPT SMP NOPTI\n CPU: 1 PID: 1907 Comm: irq/131-rtw89_p Tainted: G     U             6.6.56-05896-g89f5fb0eb30b #1 (HASH:1400 4)\n Hardware name: Google Telith/Telith, BIOS Google_Telith.15217.747.0 11/12/2024\n RIP: 0010:rtw89_vif_rx_stats_iter+0xd2/0x310 [rtw89_core]\n Code: 4c 89 7d c8 48 89 55 c0 49 8d 44 24 02 48 89 45 b8 45 31 ff eb 11\n 41 c6 45 3a 01 41 b7 01 4d 8b 6d 00 4d 39 f5 74 42 8b 43 10 \u003c41\u003e 33 45\n 32 0f b7 4b 14 66 41 33 4d 36 0f b7 c9 09 c1 74 d8 4d 85\n RSP: 0018:ffff9f3080138ca0 EFLAGS: 00010246\n RAX: 00000000b8bf5770 RBX: ffff91b5e8c639c0 RCX: 0000000000000011\n RDX: ffff91b582de1be8 RSI: 0000000000000000 RDI: ffff91b5e8c639e6\n RBP: ffff9f3080138d00 R08: 0000000000000000 R09: 0000000000000000\n R10: ffff91b59de70000 R11: ffffffffc069be50 R12: ffff91b5e8c639e4\n R13: 0000000000000000 R14: ffff91b5828020b8 R15: 0000000000000000\n FS:  0000000000000000(0000) GS:ffff91b8efa40000(0000) knlGS:0000000000000000\n CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: 0000000000000032 CR3: 00000002bf838000 CR4: 0000000000750ee0\n PKRU: 55555554\n Call Trace:\n  \u003cIRQ\u003e\n  ? __die_body+0x68/0xb0\n  ? page_fault_oops+0x379/0x3e0\n  ? exc_page_fault+0x4f/0xa0\n  ? asm_exc_page_fault+0x22/0x30\n  ? __pfx_rtw89_vif_rx_stats_iter+0x10/0x10 [rtw89_core (HASH:1400 5)]\n  ? rtw89_vif_rx_stats_iter+0xd2/0x310 [rtw89_core (HASH:1400 5)]\n  __iterate_interfaces+0x59/0x110 [mac80211 (HASH:1400 6)]\n  ? __pfx_rtw89_vif_rx_stats_iter+0x10/0x10 [rtw89_core (HASH:1400 5)]\n  ? __pfx_rtw89_vif_rx_stats_iter+0x10/0x10 [rtw89_core (HASH:1400 5)]\n  ieee80211_iterate_active_interfaces_atomic+0x36/0x50 [mac80211 (HASH:1400 6)]\n  rtw89_core_rx_to_mac80211+0xfd/0x1b0 [rtw89_core (HASH:1400 5)]\n  rtw89_core_rx+0x43a/0x980 [rtw89_core (HASH:1400 5)]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-08-22T16:00:51.397Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/892b29eab44b1803d2cad8e50f1bc2144ef478cb"
        },
        {
          "url": "https://git.kernel.org/stable/c/77a7a48f87d673a68664bebf044214821decbfda"
        },
        {
          "url": "https://git.kernel.org/stable/c/f3527ac15a00916e68ecb495b74dbe6a6c62a06f"
        },
        {
          "url": "https://git.kernel.org/stable/c/4b525630729082f026e7030eafccf89e3add7eae"
        },
        {
          "url": "https://git.kernel.org/stable/c/7e04f01bb94fe61c73cc59f0495c3b6c16a83231"
        }
      ],
      "title": "wifi: rtw89: avoid NULL dereference when RX problematic packet on unsupported 6 GHz band",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38646",
    "datePublished": "2025-08-22T16:00:51.397Z",
    "dateReserved": "2025-04-16T04:51:24.030Z",
    "dateUpdated": "2025-08-22T16:00:51.397Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2025-38646\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-08-22T16:15:38.870\",\"lastModified\":\"2025-08-22T18:08:51.663\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nwifi: rtw89: avoid NULL dereference when RX problematic packet on unsupported 6 GHz band\\n\\nWith a quite rare chance, RX report might be problematic to make SW think\\na packet is received on 6 GHz band even if the chip does not support 6 GHz\\nband actually. Since SW won\u0027t initialize stuffs for unsupported bands, NULL\\ndereference will happen then in the sequence, rtw89_vif_rx_stats_iter() -\u003e\\nrtw89_core_cancel_6ghz_probe_tx(). So, add a check to avoid it.\\n\\nThe following is a crash log for this case.\\n\\n BUG: kernel NULL pointer dereference, address: 0000000000000032\\n #PF: supervisor read access in kernel mode\\n #PF: error_code(0x0000) - not-present page\\n PGD 0 P4D 0\\n Oops: 0000 [#1] PREEMPT SMP NOPTI\\n CPU: 1 PID: 1907 Comm: irq/131-rtw89_p Tainted: G     U             6.6.56-05896-g89f5fb0eb30b #1 (HASH:1400 4)\\n Hardware name: Google Telith/Telith, BIOS Google_Telith.15217.747.0 11/12/2024\\n RIP: 0010:rtw89_vif_rx_stats_iter+0xd2/0x310 [rtw89_core]\\n Code: 4c 89 7d c8 48 89 55 c0 49 8d 44 24 02 48 89 45 b8 45 31 ff eb 11\\n 41 c6 45 3a 01 41 b7 01 4d 8b 6d 00 4d 39 f5 74 42 8b 43 10 \u003c41\u003e 33 45\\n 32 0f b7 4b 14 66 41 33 4d 36 0f b7 c9 09 c1 74 d8 4d 85\\n RSP: 0018:ffff9f3080138ca0 EFLAGS: 00010246\\n RAX: 00000000b8bf5770 RBX: ffff91b5e8c639c0 RCX: 0000000000000011\\n RDX: ffff91b582de1be8 RSI: 0000000000000000 RDI: ffff91b5e8c639e6\\n RBP: ffff9f3080138d00 R08: 0000000000000000 R09: 0000000000000000\\n R10: ffff91b59de70000 R11: ffffffffc069be50 R12: ffff91b5e8c639e4\\n R13: 0000000000000000 R14: ffff91b5828020b8 R15: 0000000000000000\\n FS:  0000000000000000(0000) GS:ffff91b8efa40000(0000) knlGS:0000000000000000\\n CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033\\n CR2: 0000000000000032 CR3: 00000002bf838000 CR4: 0000000000750ee0\\n PKRU: 55555554\\n Call Trace:\\n  \u003cIRQ\u003e\\n  ? __die_body+0x68/0xb0\\n  ? page_fault_oops+0x379/0x3e0\\n  ? exc_page_fault+0x4f/0xa0\\n  ? asm_exc_page_fault+0x22/0x30\\n  ? __pfx_rtw89_vif_rx_stats_iter+0x10/0x10 [rtw89_core (HASH:1400 5)]\\n  ? rtw89_vif_rx_stats_iter+0xd2/0x310 [rtw89_core (HASH:1400 5)]\\n  __iterate_interfaces+0x59/0x110 [mac80211 (HASH:1400 6)]\\n  ? __pfx_rtw89_vif_rx_stats_iter+0x10/0x10 [rtw89_core (HASH:1400 5)]\\n  ? __pfx_rtw89_vif_rx_stats_iter+0x10/0x10 [rtw89_core (HASH:1400 5)]\\n  ieee80211_iterate_active_interfaces_atomic+0x36/0x50 [mac80211 (HASH:1400 6)]\\n  rtw89_core_rx_to_mac80211+0xfd/0x1b0 [rtw89_core (HASH:1400 5)]\\n  rtw89_core_rx+0x43a/0x980 [rtw89_core (HASH:1400 5)]\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4b525630729082f026e7030eafccf89e3add7eae\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/77a7a48f87d673a68664bebf044214821decbfda\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7e04f01bb94fe61c73cc59f0495c3b6c16a83231\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/892b29eab44b1803d2cad8e50f1bc2144ef478cb\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f3527ac15a00916e68ecb495b74dbe6a6c62a06f\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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