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NVD / CVE Program· CNA Linux

CVE-2023-53715: wifi: brcmfmac: cfg80211: Pass the PMK in binary instead of hex

Noroxi assessment

Priority: Monitor (action score 0/100)

  • 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: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 1687845eb8f37360a9ee849a3587ab659b090773, 2bc34facb90ceeff6f8c17d2006575a6d07c3825, 2fa3a5226b05e0a797c68b9609dcebe0cd236b27.

Low priority for now. Upgrade to Linux Linux 1687845eb8f37360a9ee849a3587ab659b090773, 2bc34facb90ceeff6f8c17d2006575a6d07c3825, 2fa3a5226b05e0a797c68b9609dcebe0cd236b27 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: brcmfmac: cfg80211: Pass the PMK in binary instead of hex Apparently the hex passphrase mechanism does not work on newer chips/firmware (e.g. BCM4387). It seems there was a simple way of passing it in binary all along, so use that and avoid the hexification. OpenBSD has been doing it like this from the beginning, so this should work on all chips. Also clear the structure before setting the PMK. This was leaking uninitialized stack contents to the device.

—No exploit Fix available
Published
Oct 22, 2025
Updated
Oct 28, 2026
EPSS
0.2% · 11th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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

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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.

—

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

    • 4.13affected
    • b8a64f0e96c2b258321ee03975aeb0f5e88a055b and later · before 1687845eb8f37360a9ee849a3587ab659b090773affected · git
    • b8a64f0e96c2b258321ee03975aeb0f5e88a055b and later · before 2bc34facb90ceeff6f8c17d2006575a6d07c3825affected · git
    • b8a64f0e96c2b258321ee03975aeb0f5e88a055b and later · before 56c7e9c39bd54fd753c0c4b1ed10278cbd3a5f02affected · git
    • b8a64f0e96c2b258321ee03975aeb0f5e88a055b and later · before 4e8dc0e5c7636efaadbd7e488acd34b4291c0431affected · git
    • b8a64f0e96c2b258321ee03975aeb0f5e88a055b and later · before e242c66f7ecfe8f5b6eb308f4ea464fd8589c866affected · git
    • b8a64f0e96c2b258321ee03975aeb0f5e88a055b and later · before f8a6c53ff1d91acd5a20eb627edbffd816eb9a4eaffected · git
    • b8a64f0e96c2b258321ee03975aeb0f5e88a055b and later · before 2fa3a5226b05e0a797c68b9609dcebe0cd236b27affected · git
    • b8a64f0e96c2b258321ee03975aeb0f5e88a055b and later · before 89b89e52153fda2733562776c7c9d9d3ebf8dd6daffected · git
    • before 4.13not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.37-16.1.37-1
Debian:13linuxbefore 6.3.7-16.3.7-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2023-53713Oct 22, 2025 · arm64: sme: Use STR P to clear FFR context field in streaming SVE mode
    31Monitor
  • ← EarlierCVE-2023-53714Oct 22, 2025 · drm/stm: ltdc: fix late dereference check
    0Monitor
  • Later →CVE-2023-53716Oct 22, 2025 · net: fix skb leak in __skb_tstamp_tx()
    0Monitor

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 Linux1687845eb8f37360a9ee849a3587ab659b090773Vendor (CNA)
Linux Linux2bc34facb90ceeff6f8c17d2006575a6d07c3825Vendor (CNA)
Linux Linux2fa3a5226b05e0a797c68b9609dcebe0cd236b27Vendor (CNA)
Linux Linux4e8dc0e5c7636efaadbd7e488acd34b4291c0431Vendor (CNA)
Linux Linux56c7e9c39bd54fd753c0c4b1ed10278cbd3a5f02Vendor (CNA)
Linux Linux89b89e52153fda2733562776c7c9d9d3ebf8dd6dVendor (CNA)
Linux Linuxe242c66f7ecfe8f5b6eb308f4ea464fd8589c866Vendor (CNA)
Linux Linuxf8a6c53ff1d91acd5a20eb627edbffd816eb9a4eVendor (CNA)
debian:linux6.1.37-1 · 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).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

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✗ → ✓

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References

Show all references (7 more)

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

All records