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NVD / CVE Program· CNA Linux

CVE-2023-53384: wifi: mwifiex: avoid possible NULL skb pointer dereference

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: 0.15% (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 0c57f9ad2c3ed43abb764b0247d610ff7fdb7a00, 139d285e7695279f030dbb172e2d0245425c86c6, 231086e6a36316b823654f4535653f22d6344420.

Low priority for now. Upgrade to Linux Linux 0c57f9ad2c3ed43abb764b0247d610ff7fdb7a00, 139d285e7695279f030dbb172e2d0245425c86c6, 231086e6a36316b823654f4535653f22d6344420 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: mwifiex: avoid possible NULL skb pointer dereference In 'mwifiex_handle_uap_rx_forward()', always check the value returned by 'skb_copy()' to avoid potential NULL pointer dereference in 'mwifiex_uap_queue_bridged_pkt()', and drop original skb in case of copying failure. Found by Linux Verification Center (linuxtesting.org) with SVACE.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Sep 18, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 4th 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-2023-53384

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 kernel3.7 and later · before 4.14.326
  • linux linux kernel4.15 and later · before 4.19.295
  • linux linux kernel4.20 and later · before 5.4.257
  • linux linux kernel5.5 and later · before 5.10.195
  • linux linux kernel5.11 and later · before 5.15.132
  • linux linux kernel5.16 and later · before 6.1.53
  • linux linux kernel6.2 and later · before 6.4.16
  • linux linux kernel6.5 and later · before 6.5.3

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

    • 3.7affected
    • 838e4f44929782a2163c7bc95a7cd2da5d8b47f9 and later · before d155c5f64cefacdc6a9a26d40be53ee2903c28ffaffected · git
    • 838e4f44929782a2163c7bc95a7cd2da5d8b47f9 and later · before 139d285e7695279f030dbb172e2d0245425c86c6affected · git
    • 838e4f44929782a2163c7bc95a7cd2da5d8b47f9 and later · before 231086e6a36316b823654f4535653f22d6344420affected · git
    • 838e4f44929782a2163c7bc95a7cd2da5d8b47f9 and later · before bef85d58f7709896ed8426560ad117a73a37762faffected · git
    • 838e4f44929782a2163c7bc95a7cd2da5d8b47f9 and later · before d7fd24b8d1bb54c5bcf583139e11a5e651e0263caffected · git
    • 838e4f44929782a2163c7bc95a7cd2da5d8b47f9 and later · before 7e7197e4d6a1bc72a774590d8765909f898be1dcaffected · git
    • 838e4f44929782a2163c7bc95a7cd2da5d8b47f9 and later · before 0c57f9ad2c3ed43abb764b0247d610ff7fdb7a00affected · git
    • 838e4f44929782a2163c7bc95a7cd2da5d8b47f9 and later · before c2509f7c37355e1f0bd5b7087815b845fd383723affected · git
    • 838e4f44929782a2163c7bc95a7cd2da5d8b47f9 and later · before 35a7a1ce7c7d61664ee54f5239a1f120ab95a87eaffected · git

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.55-16.1.55-1
Debian:13linuxbefore 6.5.3-16.5.3-1

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-2023-53382Sep 18, 2025 · net/smc: Reset connection when trying to use SMCRv2 fails.
    22Monitor
  • ← EarlierCVE-2023-53383Sep 18, 2025 · irqchip/gicv3: Workaround for NVIDIA erratum T241-FABRIC-4
    22Monitor
  • Later →CVE-2023-53385Sep 18, 2025 · media: mdp3: Fix resource leaks in of_find_device_by_node
    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 Linux0c57f9ad2c3ed43abb764b0247d610ff7fdb7a00Vendor (CNA)
Linux Linux139d285e7695279f030dbb172e2d0245425c86c6Vendor (CNA)
Linux Linux231086e6a36316b823654f4535653f22d6344420Vendor (CNA)
Linux Linux35a7a1ce7c7d61664ee54f5239a1f120ab95a87eVendor (CNA)
Linux Linux7e7197e4d6a1bc72a774590d8765909f898be1dcVendor (CNA)
Linux Linuxbef85d58f7709896ed8426560ad117a73a37762fVendor (CNA)
Linux Linuxc2509f7c37355e1f0bd5b7087815b845fd383723Vendor (CNA)
Linux Linuxd155c5f64cefacdc6a9a26d40be53ee2903c28ffVendor (CNA)
Linux Linuxd7fd24b8d1bb54c5bcf583139e11a5e651e0263cVendor (CNA)
debian:linux6.1.55-1 · 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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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-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 (8 more)

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

All records