CVE-2026-80939 (GCVE-0-2026-80939)
Vulnerability from cvelistv5
Published
2026-09-11 19:42
Modified
2026-10-19 08:45
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: wifi: rtw89: pci: add .shutdown callback to stop rfkill polling on reboot Since the hardware rfkill polling was introduced, arm64 platforms can panic with an asynchronous SError during warm reboot: SError Interrupt on CPU8, code 0x00000000be000011 -- SError Workqueue: events_power_efficient rfkill_poll [rfkill] rtw89_pci_ops_read8+0x94/0x160 [rtw89_pci] rtw89_core_rfkill_poll+0x50/0x1e0 [rtw89_core] rtw89_ops_rfkill_poll+0x40/0x68 [rtw89_core] ieee80211_rfkill_poll+0x3c/0x70 [mac80211] cfg80211_rfkill_poll+0x40/0x2a0 [cfg80211] rfkill_poll+0x30/0x88 [rfkill] Kernel panic - not syncing: Asynchronous SError Interrupt On the reboot path the kernel only runs device_shutdown(), which calls each driver's .shutdown callback; .remove is not invoked. The rtw89 PCI driver had no .shutdown callback, so nothing stopped the rfkill polling work while the platform was tearing the PCIe link down. Once the link is gone, the next MMIO read from the poll handler targets a non-responding device and is reported as a fatal asynchronous SError on arm64. Add rtw89_pci_shutdown(), wired to all rtw89 PCI device drivers, which sets a new RTW89_FLAG_SHUTDOWN flag (mirroring the USB RTW89_FLAG_UNPLUGGED pattern). When the flag is set, rtw89_ops_rfkill_poll() returns early, so no MMIO read is issued to the chip after shutdown begins and the SError no longer occurs. This does not call the full .remove path from .shutdown, to keep the shutdown handler minimal and avoid running the non-idempotent teardown twice.
References
Impacted products
Vendor Product Version
Linux Linux Version: 0b38e6277aed8a59ccb64fcc1172d962c1f11b4c
Version: 0b38e6277aed8a59ccb64fcc1172d962c1f11b4c
Version: 0b38e6277aed8a59ccb64fcc1172d962c1f11b4c
Version: 0b38e6277aed8a59ccb64fcc1172d962c1f11b4c
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/realtek/rtw89/core.h",
            "drivers/net/wireless/realtek/rtw89/mac80211.c",
            "drivers/net/wireless/realtek/rtw89/pci.c",
            "drivers/net/wireless/realtek/rtw89/pci.h",
            "drivers/net/wireless/realtek/rtw89/rtw8851be.c",
            "drivers/net/wireless/realtek/rtw89/rtw8852ae.c",
            "drivers/net/wireless/realtek/rtw89/rtw8852be.c",
            "drivers/net/wireless/realtek/rtw89/rtw8852bte.c",
            "drivers/net/wireless/realtek/rtw89/rtw8852ce.c",
            "drivers/net/wireless/realtek/rtw89/rtw8922ae.c",
            "drivers/net/wireless/realtek/rtw89/rtw8922de.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "dfe2b5b2056918d186ad890079a9e7ec1898429a",
              "status": "affected",
              "version": "0b38e6277aed8a59ccb64fcc1172d962c1f11b4c",
              "versionType": "git"
            },
            {
              "lessThan": "9693980cd7d2f5b17e5ef5922b922f2e1a770fca",
              "status": "affected",
              "version": "0b38e6277aed8a59ccb64fcc1172d962c1f11b4c",
              "versionType": "git"
            },
            {
              "lessThan": "c1f214dd1351244156deb57761b14190a233aef6",
              "status": "affected",
              "version": "0b38e6277aed8a59ccb64fcc1172d962c1f11b4c",
              "versionType": "git"
            },
            {
              "lessThan": "667c12782aaf8dd3cb2213e528fe63a73cb63345",
              "status": "affected",
              "version": "0b38e6277aed8a59ccb64fcc1172d962c1f11b4c",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/wireless/realtek/rtw89/core.h",
            "drivers/net/wireless/realtek/rtw89/mac80211.c",
            "drivers/net/wireless/realtek/rtw89/pci.c",
            "drivers/net/wireless/realtek/rtw89/pci.h",
            "drivers/net/wireless/realtek/rtw89/rtw8851be.c",
            "drivers/net/wireless/realtek/rtw89/rtw8852ae.c",
            "drivers/net/wireless/realtek/rtw89/rtw8852be.c",
            "drivers/net/wireless/realtek/rtw89/rtw8852bte.c",
            "drivers/net/wireless/realtek/rtw89/rtw8852ce.c",
            "drivers/net/wireless/realtek/rtw89/rtw8922ae.c",
            "drivers/net/wireless/realtek/rtw89/rtw8922de.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.12"
            },
            {
              "lessThan": "6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.112",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.52",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.4",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nwifi: rtw89: pci: add .shutdown callback to stop rfkill polling on reboot\n\nSince the hardware rfkill polling was introduced, arm64 platforms can\npanic with an asynchronous SError during warm reboot:\n\n  SError Interrupt on CPU8, code 0x00000000be000011 -- SError\n  Workqueue: events_power_efficient rfkill_poll [rfkill]\n    rtw89_pci_ops_read8+0x94/0x160 [rtw89_pci]\n    rtw89_core_rfkill_poll+0x50/0x1e0 [rtw89_core]\n    rtw89_ops_rfkill_poll+0x40/0x68 [rtw89_core]\n    ieee80211_rfkill_poll+0x3c/0x70 [mac80211]\n    cfg80211_rfkill_poll+0x40/0x2a0 [cfg80211]\n    rfkill_poll+0x30/0x88 [rfkill]\n  Kernel panic - not syncing: Asynchronous SError Interrupt\n\nOn the reboot path the kernel only runs device_shutdown(), which calls\neach driver\u0027s .shutdown callback; .remove is not invoked.  The rtw89 PCI\ndriver had no .shutdown callback, so nothing stopped the rfkill polling\nwork while the platform was tearing the PCIe link down.  Once the link\nis gone, the next MMIO read from the poll handler targets a\nnon-responding device and is reported as a fatal asynchronous SError on\narm64.\n\nAdd rtw89_pci_shutdown(), wired to all rtw89 PCI device drivers, which\nsets a new RTW89_FLAG_SHUTDOWN flag (mirroring the USB\nRTW89_FLAG_UNPLUGGED pattern).  When the flag is set,\nrtw89_ops_rfkill_poll() returns early, so no MMIO read is issued to the\nchip after shutdown begins and the SError no longer occurs.\n\nThis does not call the full .remove path from .shutdown, to keep the\nshutdown handler minimal and avoid running the non-idempotent teardown\ntwice."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:45:23.179Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/dfe2b5b2056918d186ad890079a9e7ec1898429a"
        },
        {
          "url": "https://git.kernel.org/stable/c/9693980cd7d2f5b17e5ef5922b922f2e1a770fca"
        },
        {
          "url": "https://git.kernel.org/stable/c/c1f214dd1351244156deb57761b14190a233aef6"
        },
        {
          "url": "https://git.kernel.org/stable/c/667c12782aaf8dd3cb2213e528fe63a73cb63345"
        }
      ],
      "title": "wifi: rtw89: pci: add .shutdown callback to stop rfkill polling on reboot",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-80939",
    "datePublished": "2026-09-11T19:42:12.340Z",
    "dateReserved": "2026-08-26T14:34:25.803Z",
    "dateUpdated": "2026-10-19T08:45:23.179Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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