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NVD / CVE Program· CNA Linux

CVE-2022-50321: wifi: brcmfmac: fix potential memory leak in brcmf_netdev_start_xmit()

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: 0.16% (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 212fde3fe76e962598ce1d47b97cc78afdfc71b3, 3a4d18318f473e97d628f410215b3fac32d07aed, 4c55fdebc1c358de96bfab52ed309d58a3ba66ef.

Low priority for now. Upgrade to Linux Linux 212fde3fe76e962598ce1d47b97cc78afdfc71b3, 3a4d18318f473e97d628f410215b3fac32d07aed, 4c55fdebc1c358de96bfab52ed309d58a3ba66ef 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: fix potential memory leak in brcmf_netdev_start_xmit() The brcmf_netdev_start_xmit() returns NETDEV_TX_OK without freeing skb in case of pskb_expand_head() fails, add dev_kfree_skb() to fix it. Compile tested only.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Sep 15, 2025
Updated
Nov 5, 2026
EPSS
0.1% · 5th 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%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

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.

Follow CVE-2022-50321

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 kernel4.13 and later · before 4.14.308
  • linux linux kernel4.15 and later · before 4.19.276
  • linux linux kernel4.20 and later · before 5.4.235
  • linux linux kernel5.5 and later · before 5.10.173
  • linux linux kernel5.11 and later · before 5.15.99
  • linux linux kernel5.16 and later · before 6.1.16
  • linux linux kernel6.2 and later · before 6.2.3

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
    • 270a6c1f65fe68a28a5d39cd405592c550b496c7 and later · before 4c55fdebc1c358de96bfab52ed309d58a3ba66efaffected · git
    • 270a6c1f65fe68a28a5d39cd405592c550b496c7 and later · before e5d01e85cf46628647cd696cb72ba4659b18967faffected · git
    • 270a6c1f65fe68a28a5d39cd405592c550b496c7 and later · before d869a189505224601e310c7769cb90b0e2f60b31affected · git
    • 270a6c1f65fe68a28a5d39cd405592c550b496c7 and later · before e08e6812efb6a8c676e733de0518594d1517e0d9affected · git
    • 270a6c1f65fe68a28a5d39cd405592c550b496c7 and later · before e8ef89e5b89ee041a94eecfb6c31fcc237f9168caffected · git
    • 270a6c1f65fe68a28a5d39cd405592c550b496c7 and later · before 7f159116d620615779adbf88a5d94713702216d8affected · git
    • 270a6c1f65fe68a28a5d39cd405592c550b496c7 and later · before 3a4d18318f473e97d628f410215b3fac32d07aedaffected · git
    • 270a6c1f65fe68a28a5d39cd405592c550b496c7 and later · before 212fde3fe76e962598ce1d47b97cc78afdfc71b3affected · 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 6.1.20-16.1.20-1

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-2022-50317Sep 15, 2025 · drm/bridge: megachips: Fix a null pointer dereference bug
    22Monitor
  • ← EarlierCVE-2022-50320Sep 15, 2025 · ACPI: tables: FPDT: Don't call acpi_os_map_memory() on invalid phys address
    31Monitor
  • Later →CVE-2022-50322Sep 15, 2025 · rtc: msc313: Fix function prototype mismatch in msc313_rtc_probe()
    22Monitor

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 Linux212fde3fe76e962598ce1d47b97cc78afdfc71b3Vendor (CNA)
Linux Linux3a4d18318f473e97d628f410215b3fac32d07aedVendor (CNA)
Linux Linux4c55fdebc1c358de96bfab52ed309d58a3ba66efVendor (CNA)
Linux Linux7f159116d620615779adbf88a5d94713702216d8Vendor (CNA)
Linux Linuxd869a189505224601e310c7769cb90b0e2f60b31Vendor (CNA)
Linux Linuxe08e6812efb6a8c676e733de0518594d1517e0d9Vendor (CNA)
Linux Linuxe5d01e85cf46628647cd696cb72ba4659b18967fVendor (CNA)
Linux Linuxe8ef89e5b89ee041a94eecfb6c31fcc237f9168cVendor (CNA)
debian:linux6.1.20-1 · 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

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-401 · Missing Release of Memory after Effective Lifetime

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. SSVC exploitation— → none
  2. 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