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NVD / CVE Program· CNA Linux

CVE-2023-53456: scsi: qla4xxx: Add length check when parsing nlattrs

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 25feffb3fbd51ae81d92c65cebc0e932663828b3, 47cd3770e31df942e2bb925a9a855c79ed0662eb, 47f3be62eab50b8cd7e1ae5fc2c4dae687497c34.

Low priority for now. Upgrade to Linux Linux 25feffb3fbd51ae81d92c65cebc0e932663828b3, 47cd3770e31df942e2bb925a9a855c79ed0662eb, 47f3be62eab50b8cd7e1ae5fc2c4dae687497c34 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: scsi: qla4xxx: Add length check when parsing nlattrs There are three places that qla4xxx parses nlattrs: - qla4xxx_set_chap_entry() - qla4xxx_iface_set_param() - qla4xxx_sysfs_ddb_set_param() and each of them directly converts the nlattr to specific pointer of structure without length checking. This could be dangerous as those attributes are not validated and a malformed nlattr (e.g., length 0) could result in an OOB read that leaks heap dirty data. Add the nla_len check before accessing the nlattr data and return EINVAL if the length check fails.

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

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.

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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 kernel3.2 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

    • 3.2affected
    • 00c31889f7513e9ffa6b2b4de8ad6d7f59a61c80 and later · before cfa6a1a79ed6d336fac7a5d87eb5471e4401829faffected · git
    • 00c31889f7513e9ffa6b2b4de8ad6d7f59a61c80 and later · before 5925e224cc6edfef57b20447f18323208461309baffected · git
    • 00c31889f7513e9ffa6b2b4de8ad6d7f59a61c80 and later · before 47f3be62eab50b8cd7e1ae5fc2c4dae687497c34affected · git
    • 00c31889f7513e9ffa6b2b4de8ad6d7f59a61c80 and later · before 6d65079c69dc1feb817ed71f5bd15e83a7d6832daffected · git
    • 00c31889f7513e9ffa6b2b4de8ad6d7f59a61c80 and later · before f61fc650c47849637fa1771a31a11674c824138aaffected · git
    • 00c31889f7513e9ffa6b2b4de8ad6d7f59a61c80 and later · before 25feffb3fbd51ae81d92c65cebc0e932663828b3affected · git
    • 00c31889f7513e9ffa6b2b4de8ad6d7f59a61c80 and later · before 4ed21975311247bb84e82298eeb359ec0a0fa84daffected · git
    • 00c31889f7513e9ffa6b2b4de8ad6d7f59a61c80 and later · before b018c0440b871d8b001c996e95fa4538bd292de6affected · git
    • 00c31889f7513e9ffa6b2b4de8ad6d7f59a61c80 and later · before 47cd3770e31df942e2bb925a9a855c79ed0662ebaffected · 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-2023-53453Oct 1, 2025 · drm/radeon: free iio for atombios when driver shutdown
    22Monitor
  • ← EarlierCVE-2023-53454Oct 1, 2025 · HID: multitouch: Correct devm device reference for hidinput input_dev name
    31Monitor
  • Later →CVE-2023-53457Oct 1, 2025 · FS: JFS: Fix null-ptr-deref Read in txBegin
    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 Linux25feffb3fbd51ae81d92c65cebc0e932663828b3Vendor (CNA)
Linux Linux47cd3770e31df942e2bb925a9a855c79ed0662ebVendor (CNA)
Linux Linux47f3be62eab50b8cd7e1ae5fc2c4dae687497c34Vendor (CNA)
Linux Linux4ed21975311247bb84e82298eeb359ec0a0fa84dVendor (CNA)
Linux Linux5925e224cc6edfef57b20447f18323208461309bVendor (CNA)
Linux Linux6d65079c69dc1feb817ed71f5bd15e83a7d6832dVendor (CNA)
Linux Linuxb018c0440b871d8b001c996e95fa4538bd292de6Vendor (CNA)
Linux Linuxcfa6a1a79ed6d336fac7a5d87eb5471e4401829fVendor (CNA)
Linux Linuxf61fc650c47849637fa1771a31a11674c824138aVendor (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
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)

—

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 (8 more)

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

All records