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NVD / CVE Program· CNA Linux

CVE-2023-53451: scsi: qla2xxx: Fix potential NULL 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: 0.16% (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 02405f4023866ae91a611b5b85cb2e074ec2de5a, 2bea9c1c983152c5411f5a2f1113cb790ce1389d, 464ea494a40c6e3e0e8f91dd325408aaf21515ba.

Low priority for now. Upgrade to Linux Linux 02405f4023866ae91a611b5b85cb2e074ec2de5a, 2bea9c1c983152c5411f5a2f1113cb790ce1389d, 464ea494a40c6e3e0e8f91dd325408aaf21515ba 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: qla2xxx: Fix potential NULL pointer dereference Klocwork tool reported 'cur_dsd' may be dereferenced. Add fix to validate pointer before dereferencing the pointer.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Oct 1, 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%

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-2023-53451

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 kernel2.6.35 and later · before 4.14.322
  • linux linux kernel4.15 and later · before 4.19.291
  • linux linux kernel4.20 and later · before 5.4.251
  • linux linux kernel5.5 and later · before 5.10.188
  • linux linux kernel5.11 and later · before 5.15.121
  • linux linux kernel5.16 and later · before 6.1.40
  • linux linux kernel6.2 and later · before 6.4.5

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

    • 2.6.35affected
    • a9083016a5314b3aeba6e0d2e814872e72168c08 and later · before 02405f4023866ae91a611b5b85cb2e074ec2de5aaffected · git
    • a9083016a5314b3aeba6e0d2e814872e72168c08 and later · before ee4c9a93238b9ce3703942500cb1aeacf77090d2affected · git
    • a9083016a5314b3aeba6e0d2e814872e72168c08 and later · before 4f90a8b0481615622bd0558aa8cf361bea872045affected · git
    • a9083016a5314b3aeba6e0d2e814872e72168c08 and later · before 2bea9c1c983152c5411f5a2f1113cb790ce1389daffected · git
    • a9083016a5314b3aeba6e0d2e814872e72168c08 and later · before 5a52a2e14fe866541bbc0033058e44bf0bf0c580affected · git
    • a9083016a5314b3aeba6e0d2e814872e72168c08 and later · before ce2cdbe530b0066bae1f98dbab590a232d507eaaaffected · git
    • a9083016a5314b3aeba6e0d2e814872e72168c08 and later · before af7affc0f6b82a5bde430fc4f0dcf70963442fbcaffected · git
    • a9083016a5314b3aeba6e0d2e814872e72168c08 and later · before 464ea494a40c6e3e0e8f91dd325408aaf21515baaffected · git
    • before 2.6.35not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.52-16.1.52-1
Debian:13linuxbefore 6.4.11-16.4.11-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • 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
  • CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
    83Now

Published before and after this one in the same product

  • ← EarlierCVE-2023-53449Oct 1, 2025 · s390/dasd: Fix potential memleak in dasd_eckd_init()
    22Monitor
  • ← EarlierCVE-2023-53450Oct 1, 2025 · ext4: remove a BUG_ON in ext4_mb_release_group_pa()
    22Monitor
  • Later →CVE-2023-53452Oct 1, 2025 · wifi: rtw89: fix potential race condition between napi_init and napi_enable
    18Monitor

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 Linux02405f4023866ae91a611b5b85cb2e074ec2de5aVendor (CNA)
Linux Linux2bea9c1c983152c5411f5a2f1113cb790ce1389dVendor (CNA)
Linux Linux464ea494a40c6e3e0e8f91dd325408aaf21515baVendor (CNA)
Linux Linux4f90a8b0481615622bd0558aa8cf361bea872045Vendor (CNA)
Linux Linux5a52a2e14fe866541bbc0033058e44bf0bf0c580Vendor (CNA)
Linux Linuxaf7affc0f6b82a5bde430fc4f0dcf70963442fbcVendor (CNA)
Linux Linuxce2cdbe530b0066bae1f98dbab590a232d507eaaVendor (CNA)
Linux Linuxee4c9a93238b9ce3703942500cb1aeacf77090d2Vendor (CNA)
debian:linux6.1.52-1 · 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 (7 more)

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

All records