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NVD / CVE Program· CNA Linux

CVE-2023-53125: net: usb: smsc75xx: Limit packet length to skb->len

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: 0.19% (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 105db6574281e1e03fcbf87983f4fee111682306, 4a4de0a68b18485c68ab4f0cfa665b1633c6d277, 53966d572d056d6b234cfe76a5f9d60049d3c178.

Low priority for now. Upgrade to Linux Linux 105db6574281e1e03fcbf87983f4fee111682306, 4a4de0a68b18485c68ab4f0cfa665b1633c6d277, 53966d572d056d6b234cfe76a5f9d60049d3c178 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: usb: smsc75xx: Limit packet length to skb->len Packet length retrieved from skb data may be larger than the actual socket buffer length (up to 9026 bytes). In such case the cloned skb passed up the network stack will leak kernel memory contents.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 2, 2025
Updated
Nov 5, 2026
EPSS
0.1% · 8th 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-2023-53125

When you'll hear from us

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  • when exploit code appears or is weaponized
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  • 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 kernel2.6.35 and later · before 4.14.311
  • linux linux kernel4.15 and later · before 4.19.279
  • linux linux kernel4.20 and later · before 5.4.238
  • linux linux kernel5.5 and later · before 5.10.176
  • linux linux kernel5.11 and later · before 5.15.104
  • linux linux kernel5.16 and later · before 6.1.21
  • linux linux kernel6.2 and later · before 6.2.8
  • linux linux kernel2.6.34
  • linux linux kernel6.3

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

    • 2.6.34affected
    • d0cad871703b898a442e4049c532ec39168e5b57 and later · before 4a4de0a68b18485c68ab4f0cfa665b1633c6d277affected · git
    • d0cad871703b898a442e4049c532ec39168e5b57 and later · before 53966d572d056d6b234cfe76a5f9d60049d3c178affected · git
    • d0cad871703b898a442e4049c532ec39168e5b57 and later · before 9fabdd79051a9fe51388df099aff6e4b660fedd2affected · git
    • d0cad871703b898a442e4049c532ec39168e5b57 and later · before e294f0aa47e4844f3d3c8766c02accd5a76a7d4eaffected · git
    • d0cad871703b898a442e4049c532ec39168e5b57 and later · before 105db6574281e1e03fcbf87983f4fee111682306affected · git
    • d0cad871703b898a442e4049c532ec39168e5b57 and later · before c7bdc137ca163b90917c1eeba4f1937684bd4f8baffected · git
    • d0cad871703b898a442e4049c532ec39168e5b57 and later · before 8ee5df9c039e37b9d8eb5e3de08bfb7f53d31cb6affected · git
    • d0cad871703b898a442e4049c532ec39168e5b57 and later · before d8b228318935044dafe3a5bc07ee71a1f1424b8daffected · git
    • before 2.6.34not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:8bpftoolbefore 4.18.0-553.75.1.el8_104.18.0-553.75.1.el8_10
AlmaLinux:8kernelbefore 4.18.0-553.75.1.el8_104.18.0-553.75.1.el8_10
AlmaLinux:8kernel-abi-stablelistsbefore 4.18.0-553.75.1.el8_104.18.0-553.75.1.el8_10
AlmaLinux:8kernel-corebefore 4.18.0-553.75.1.el8_104.18.0-553.75.1.el8_10
AlmaLinux:8kernel-cross-headersbefore 4.18.0-553.75.1.el8_104.18.0-553.75.1.el8_10
AlmaLinux:8kernel-debugbefore 4.18.0-553.75.1.el8_104.18.0-553.75.1.el8_10
AlmaLinux:8kernel-debug-corebefore 4.18.0-553.75.1.el8_104.18.0-553.75.1.el8_10
AlmaLinux:8kernel-debug-develbefore 4.18.0-553.75.1.el8_104.18.0-553.75.1.el8_10
AlmaLinux:8kernel-debug-modulesbefore 4.18.0-553.75.1.el8_104.18.0-553.75.1.el8_10
AlmaLinux:8kernel-debug-modules-extrabefore 4.18.0-553.75.1.el8_104.18.0-553.75.1.el8_10
AlmaLinux:8kernel-develbefore 4.18.0-553.75.1.el8_104.18.0-553.75.1.el8_10
AlmaLinux:8kernel-docbefore 4.18.0-553.75.1.el8_104.18.0-553.75.1.el8_10
AlmaLinux:8kernel-headersbefore 4.18.0-553.75.1.el8_104.18.0-553.75.1.el8_10
AlmaLinux:8kernel-modulesbefore 4.18.0-553.75.1.el8_104.18.0-553.75.1.el8_10
AlmaLinux:8kernel-modules-extrabefore 4.18.0-553.75.1.el8_104.18.0-553.75.1.el8_10
AlmaLinux:8kernel-toolsbefore 4.18.0-553.75.1.el8_104.18.0-553.75.1.el8_10
AlmaLinux:8kernel-tools-libsbefore 4.18.0-553.75.1.el8_104.18.0-553.75.1.el8_10
AlmaLinux:8kernel-tools-libs-develbefore 4.18.0-553.75.1.el8_104.18.0-553.75.1.el8_10
AlmaLinux:8kernel-zfcpdumpbefore 4.18.0-553.75.1.el8_104.18.0-553.75.1.el8_10
AlmaLinux:8kernel-zfcpdump-corebefore 4.18.0-553.75.1.el8_104.18.0-553.75.1.el8_10
AlmaLinux:8kernel-zfcpdump-develbefore 4.18.0-553.75.1.el8_104.18.0-553.75.1.el8_10
AlmaLinux:8kernel-zfcpdump-modulesbefore 4.18.0-553.75.1.el8_104.18.0-553.75.1.el8_10
AlmaLinux:8kernel-zfcpdump-modules-extrabefore 4.18.0-553.75.1.el8_104.18.0-553.75.1.el8_10
AlmaLinux:8perfbefore 4.18.0-553.75.1.el8_104.18.0-553.75.1.el8_10

+96

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-2023-53123May 2, 2025 · PCI: s390: Fix use-after-free of PCI resources with per-function hotplug
    31Monitor
  • ← EarlierCVE-2023-53124May 2, 2025 · scsi: mpt3sas: Fix NULL pointer access in mpt3sas_transport_port_add()
    22Monitor
  • Later →CVE-2023-53126May 2, 2025 · scsi: mpi3mr: Fix sas_hba.phy memory leak in mpi3mr_remove()
    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 Linux105db6574281e1e03fcbf87983f4fee111682306Vendor (CNA)
Linux Linux4a4de0a68b18485c68ab4f0cfa665b1633c6d277Vendor (CNA)
Linux Linux53966d572d056d6b234cfe76a5f9d60049d3c178Vendor (CNA)
Linux Linux8ee5df9c039e37b9d8eb5e3de08bfb7f53d31cb6Vendor (CNA)
Linux Linux9fabdd79051a9fe51388df099aff6e4b660fedd2Vendor (CNA)
Linux Linuxc7bdc137ca163b90917c1eeba4f1937684bd4f8bVendor (CNA)
Linux Linuxd8b228318935044dafe3a5bc07ee71a1f1424b8dVendor (CNA)
Linux Linuxe294f0aa47e4844f3d3c8766c02accd5a76a7d4eVendor (CNA)
almalinux:bpftool4.18.0-553.75.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel4.18.0-553.75.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-abi-stablelists4.18.0-553.75.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-core4.18.0-553.75.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-cross-headers4.18.0-553.75.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug4.18.0-553.75.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-core4.18.0-553.75.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-devel4.18.0-553.75.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-modules4.18.0-553.75.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-modules-extra4.18.0-553.75.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-devel4.18.0-553.75.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-doc4.18.0-553.75.1.el8_10 · AlmaLinux:8Package registry (OSV)
debian:linux6.1.25-1 · Debian:12Package registry (OSV)
red hat:bpftool0:4.18.0-553.75.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:bpftool-debuginfo0:4.18.0-553.75.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel0:4.18.0-553.75.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-abi-stablelists0:4.18.0-553.75.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-core0:4.18.0-553.75.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug0:4.18.0-553.75.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-core0:4.18.0-553.75.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-debuginfo0:4.18.0-553.75.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)
red hat:kernel-debug-devel0:4.18.0-553.75.1.el8_10 · Red Hat:enterprise_linux:8::baseosPackage registry (OSV)

+3

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