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NVD / CVE Program· CNA Linux

CVE-2026-46092: wifi: rtw88: check for PCI upstream bridge existence

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.13% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 000134a20bbf89b1152520a2eef71f91fdb83a5b, 3b89b4c095804c478d50376285e66700cf3c045f, 3bbbb56204f7359ce2139a9341b43b52a186261c.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 000134a20bbf89b1152520a2eef71f91fdb83a5b, 3b89b4c095804c478d50376285e66700cf3c045f, 3bbbb56204f7359ce2139a9341b43b52a186261c or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

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.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 27, 2026
Updated
Oct 15, 2026
EPSS
0.1% · 3th percentile

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

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When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel5.15.17 and later · before 5.16
  • linux linux kernel5.16.3 and later · before 7.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • f21e8cb927fa9da49490b74ddda3856a828b82d6, 5.17affected
    • 617339466fda09916c4b4151fa5e6a9c1fdae353 and later · before 959c13da6c36167ce1016d400a6104d2367f686eaffected · git
    • 24f5e38a13b5ae2b6105cda8bb47c19108e62a9a and later · before 3b89b4c095804c478d50376285e66700cf3c045faffected · git
    • 24f5e38a13b5ae2b6105cda8bb47c19108e62a9a and later · before cc9b6303e7ea91bc360b42c7edc1fe9ceb2f47feaffected · git
    • 24f5e38a13b5ae2b6105cda8bb47c19108e62a9a and later · before 6c53d68e3bcfc8faccdd76c3383a9232b05c9ae6affected · git
    • 24f5e38a13b5ae2b6105cda8bb47c19108e62a9a and later · before 000134a20bbf89b1152520a2eef71f91fdb83a5baffected · git
    • 24f5e38a13b5ae2b6105cda8bb47c19108e62a9a and later · before 3bbbb56204f7359ce2139a9341b43b52a186261caffected · git
    • 24f5e38a13b5ae2b6105cda8bb47c19108e62a9a and later · before eb101d2abdcccb514ca4fccd3b278dd8267374f6affected · git
    • 5.15.17 and later · before 5.15.210affected · semver
    • 5.16.3 and later · before 5.17affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.176-16.1.176-1
Debian:13linuxbefore 6.12.86-16.12.86-1
Debian:14linuxbefore 7.0.4-17.0.4-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2026-46088May 27, 2026 · ALSA: control: Validate buf_len before strnlen() in snd_ctl_elem_init_enum_names()
    22Monitor
  • ← EarlierCVE-2026-46090May 27, 2026 · ALSA: aloop: Fix peer runtime UAF during format-change stop
    31Monitor
  • Later →CVE-2026-46099May 27, 2026 · net: ipv6: fix NOREF dst use in seg6 and rpl lwtunnels
    32Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux000134a20bbf89b1152520a2eef71f91fdb83a5bVendor (CNA)
Linux Linux3b89b4c095804c478d50376285e66700cf3c045fVendor (CNA)
Linux Linux3bbbb56204f7359ce2139a9341b43b52a186261cVendor (CNA)
Linux Linux5.15.210Vendor (CNA)
Linux Linux5.17Vendor (CNA)
Linux Linux6c53d68e3bcfc8faccdd76c3383a9232b05c9ae6Vendor (CNA)
Linux Linux959c13da6c36167ce1016d400a6104d2367f686eVendor (CNA)
Linux Linuxcc9b6303e7ea91bc360b42c7edc1fe9ceb2f47feVendor (CNA)
Linux Linuxeb101d2abdcccb514ca4fccd3b278dd8267374f6Vendor (CNA)
debian:linux6.1.176-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

No history yet (it accumulates with the daily EPSS job).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

CWE-476 · NULL Pointer Dereference

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records