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NVD / CVE Program· CNA Linux

CVE-2023-53495: net: ethernet: mvpp2_main: fix possible OOB write in mvpp2_ethtool_get_rxnfc()

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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: 0.17% (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 349638f7e5d3c7d328565587bb7b0454bbee02e2, 51fe0a470543f345e3c62b6798929de3ddcedc1d, 5bb09dddc724c5f7c4dc6dd3bfebd685eecd93e8.

Low priority for now. Upgrade to Linux Linux 349638f7e5d3c7d328565587bb7b0454bbee02e2, 51fe0a470543f345e3c62b6798929de3ddcedc1d, 5bb09dddc724c5f7c4dc6dd3bfebd685eecd93e8 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: net: ethernet: mvpp2_main: fix possible OOB write in mvpp2_ethtool_get_rxnfc() rules is allocated in ethtool_get_rxnfc and the size is determined by rule_cnt from user space. So rule_cnt needs to be check before using rules to avoid OOB writing or NULL pointer dereference.

HighCVSS 7.8 · v3.1—No exploit Fix available
Published
Oct 1, 2025
Updated
Aug 5, 2026
EPSS
0.1% · 6th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CNA vs NVD score

NVD
7.8
CNA · Linux
7.8
agree

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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-2023-53495

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 kernel5.2 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 6.1.54
  • linux linux kernel6.2 and later · before 6.5.4
  • linux linux kernel6.6

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

    • 5.2affected
    • 90b509b39ac9b09be88eb641c7a3abd8de06b698 and later · before ba6673824efa3dc198b04a54e69dce480066d7d9affected · git
    • 90b509b39ac9b09be88eb641c7a3abd8de06b698 and later · before 61054a8ddb176b155a8f2bacdfefb3727187f5d9affected · git
    • 90b509b39ac9b09be88eb641c7a3abd8de06b698 and later · before 5bb09dddc724c5f7c4dc6dd3bfebd685eecd93e8affected · git
    • 90b509b39ac9b09be88eb641c7a3abd8de06b698 and later · before 349638f7e5d3c7d328565587bb7b0454bbee02e2affected · git
    • 90b509b39ac9b09be88eb641c7a3abd8de06b698 and later · before 625b70d31dd4df4b96b3ddcbe251debb33bd67f5affected · git
    • 90b509b39ac9b09be88eb641c7a3abd8de06b698 and later · before 51fe0a470543f345e3c62b6798929de3ddcedc1daffected · git
    • before 5.2not affected · semver
    • 5.4.257 and later · up to and including 5.4.*not affected · semver
    • 5.10.195 and later · up to and including 5.10.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.55-16.1.55-1
Debian:13linuxbefore 6.5.6-16.5.6-1

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-2023-53493Oct 1, 2025 · accel/qaic: tighten bounds checking in decode_message()
    31Monitor
  • ← EarlierCVE-2023-53494Oct 1, 2025 · crypto: xts - Handle EBUSY correctly
    31Monitor
  • Later →CVE-2023-53496Oct 1, 2025 · x86/platform/uv: Use alternate source for socket to node data
    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 Linux349638f7e5d3c7d328565587bb7b0454bbee02e2Vendor (CNA)
Linux Linux51fe0a470543f345e3c62b6798929de3ddcedc1dVendor (CNA)
Linux Linux5bb09dddc724c5f7c4dc6dd3bfebd685eecd93e8Vendor (CNA)
Linux Linux61054a8ddb176b155a8f2bacdfefb3727187f5d9Vendor (CNA)
Linux Linux625b70d31dd4df4b96b3ddcbe251debb33bd67f5Vendor (CNA)
Linux Linuxba6673824efa3dc198b04a54e69dce480066d7d9Vendor (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.

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

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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 (5 more)

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

All records