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wifi: rtw88: check for PCI upstream bridge existence

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: wifi: rtw88: check for PCI upstream bridge existence pci_upstream_bridge() returns NULL if the device is on a root bus. If 8821CE is installed in the system with such a PCI topology, the probing routine will crash. This has probably been unnoticed as 8821CE is mostly supplied in laptops where there is a PCI-to-PCI bridge located upstream from the device. However the card might be installed on a system with different configuration. Check if the bridge does exist for the specific workaround to be applied. Found by Linux Verification Center (linuxtesting.org) with Svace static analysis tool.

Announced Source revision 1
Original source ↗

CVE-2026-46092

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-46092

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "617339466fda09916c4b4151fa5e6a9c1fdae353",
        "lessThan": "959c13da6c36167ce1016d400a6104d2367f686e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "24f5e38a13b5ae2b6105cda8bb47c19108e62a9a",
        "lessThan": "3b89b4c095804c478d50376285e66700cf3c045f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "24f5e38a13b5ae2b6105cda8bb47c19108e62a9a",
        "lessThan": "cc9b6303e7ea91bc360b42c7edc1fe9ceb2f47fe",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "24f5e38a13b5ae2b6105cda8bb47c19108e62a9a",
        "lessThan": "6c53d68e3bcfc8faccdd76c3383a9232b05c9ae6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "24f5e38a13b5ae2b6105cda8bb47c19108e62a9a",
        "lessThan": "000134a20bbf89b1152520a2eef71f91fdb83a5b",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "24f5e38a13b5ae2b6105cda8bb47c19108e62a9a",
        "lessThan": "3bbbb56204f7359ce2139a9341b43b52a186261c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "24f5e38a13b5ae2b6105cda8bb47c19108e62a9a",
        "lessThan": "eb101d2abdcccb514ca4fccd3b278dd8267374f6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "f21e8cb927fa9da49490b74ddda3856a828b82d6",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5.15.17",
        "lessThan": "5.15.210",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "5.16.3",
        "lessThan": "5.17",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "drivers/net/wireless/realtek/rtw88/pci.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.17"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.17",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.15.210",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.175",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.140",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.86",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.27",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.0.4",
        "versionType": "semver",
        "lessThanOrEqual": "7.0.*"
      },
      {
        "status": "unaffected",
        "version": "7.1",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/net/wireless/realtek/rtw88/pci.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-46092

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#28388 · Revision 1
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Publisher date
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