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NVD / CVE Program· CNA Linux

CVE-2023-53277: wifi: iwl3945: Add missing check for create_singlethread_workqueue

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 17e07d6587c55015956862ef3b101fd45fa49fbc, 1fdeb8b9f29dfd64805bb49475ac7566a3cb06cb, 2f80b3ff92514ebd227e5c55d3d1e480401b02b7.

Low priority for now. Upgrade to Linux Linux 17e07d6587c55015956862ef3b101fd45fa49fbc, 1fdeb8b9f29dfd64805bb49475ac7566a3cb06cb, 2f80b3ff92514ebd227e5c55d3d1e480401b02b7 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: iwl3945: Add missing check for create_singlethread_workqueue Add the check for the return value of the create_singlethread_workqueue in order to avoid NULL pointer dereference.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Sep 16, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 5th 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-2023-53277

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 kernel2.6.24 and later · before 4.19.276
  • linux linux kernel4.20 and later · before 5.4.235
  • linux linux kernel5.5 and later · before 5.10.173
  • linux linux kernel5.11 and later · before 5.15.99
  • linux linux kernel5.16 and later · before 6.1.16
  • linux linux kernel6.2 and later · before 6.2.3

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

    • 2.6.24affected
    • b481de9ca074528fe8c429604e2777db8b89806a and later · before 3ae2fc4de12686f3fe695824169c1272c9f798f7affected · git
    • b481de9ca074528fe8c429604e2777db8b89806a and later · before 7e594abc0424e4f8c2385f11aefeaadcfc507aa5affected · git
    • b481de9ca074528fe8c429604e2777db8b89806a and later · before 2f80b3ff92514ebd227e5c55d3d1e480401b02b7affected · git
    • b481de9ca074528fe8c429604e2777db8b89806a and later · before 505c74c4c0b1c5bcaa98a93b3087c268156070f1affected · git
    • b481de9ca074528fe8c429604e2777db8b89806a and later · before 34f611204ae589bd5c494b10b41fb13436bd3c3faffected · git
    • b481de9ca074528fe8c429604e2777db8b89806a and later · before 17e07d6587c55015956862ef3b101fd45fa49fbcaffected · git
    • b481de9ca074528fe8c429604e2777db8b89806a and later · before 1fdeb8b9f29dfd64805bb49475ac7566a3cb06cbaffected · git
    • before 2.6.24not affected · semver
    • 4.19.276 and later · up to and including 4.19.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.20-16.1.20-1

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-2023-53275Sep 16, 2025 · ALSA: hda: fix a possible null-pointer dereference due to data race in snd_hdac_regmap_sync()
    22Monitor
  • ← EarlierCVE-2023-53276Sep 16, 2025 · ubifs: Free memory for tmpfile name
    22Monitor
  • Later →CVE-2023-53278Sep 16, 2025 · ubifs: Fix memory leak in ubifs_sysfs_init()
    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 Linux17e07d6587c55015956862ef3b101fd45fa49fbcVendor (CNA)
Linux Linux1fdeb8b9f29dfd64805bb49475ac7566a3cb06cbVendor (CNA)
Linux Linux2f80b3ff92514ebd227e5c55d3d1e480401b02b7Vendor (CNA)
Linux Linux34f611204ae589bd5c494b10b41fb13436bd3c3fVendor (CNA)
Linux Linux3ae2fc4de12686f3fe695824169c1272c9f798f7Vendor (CNA)
Linux Linux505c74c4c0b1c5bcaa98a93b3087c268156070f1Vendor (CNA)
Linux Linux7e594abc0424e4f8c2385f11aefeaadcfc507aa5Vendor (CNA)
debian:linux6.1.20-1 · 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)

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 (6 more)

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

All records