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NVD / CVE Program· CNA Linux

CVE-2026-23020: net: 3com: 3c59x: fix possible null dereference in vortex_probe1()

MediumCVSS 5.5 · v3.1—No exploit Fix available

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: 0.13% (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 053ac9e37eee435e999277c0f1ef890dad6064bf, 28b2a805609699be7b90020ae7dccfb234be1ceb, 2f05f7737e16d9a40038cc1c38a96a3f7964898b.

Low priority for now. Upgrade to Linux Linux 053ac9e37eee435e999277c0f1ef890dad6064bf, 28b2a805609699be7b90020ae7dccfb234be1ceb, 2f05f7737e16d9a40038cc1c38a96a3f7964898b 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: 3com: 3c59x: fix possible null dereference in vortex_probe1() pdev can be null and free_ring: can be called in 1297 with a null pdev.

Published
Jan 31, 2026
Updated
Jun 17, 2026
EPSS
0.1% · 3th 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-2026-23020

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 kernel4.16.12 and later · before 4.17
  • linux linux kernel4.17.1 and later · before 5.10.248
  • linux linux kernel5.11 and later · before 5.15.198
  • linux linux kernel5.16 and later · before 6.1.161
  • linux linux kernel6.2 and later · before 6.6.121
  • linux linux kernel6.7 and later · before 6.12.66
  • linux linux kernel6.13 and later · before 6.18.6
  • linux linux kernel4.17
  • linux linux kernel6.19

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

    • d30fdc02c49ad9965bba25015ae66c22dae967d1, 4.17affected
    • 55c82617c3e82210b7471e9334e8fc5df6a9961f and later · before 053ac9e37eee435e999277c0f1ef890dad6064bfaffected · git
    • 55c82617c3e82210b7471e9334e8fc5df6a9961f and later · before 6cff14b831dbdb32675b4c7904dcc3eeeaf47e9daffected · git
    • 55c82617c3e82210b7471e9334e8fc5df6a9961f and later · before 606872c8e8bf96066730f6a2317502c5633c37f1affected · git
    • 55c82617c3e82210b7471e9334e8fc5df6a9961f and later · before 28b2a805609699be7b90020ae7dccfb234be1cebaffected · git
    • 55c82617c3e82210b7471e9334e8fc5df6a9961f and later · before 2f05f7737e16d9a40038cc1c38a96a3f7964898baffected · git
    • 55c82617c3e82210b7471e9334e8fc5df6a9961f and later · before d82796a57cc0dac1dbef19d913c8f02a8cc7b1a7affected · git
    • 55c82617c3e82210b7471e9334e8fc5df6a9961f and later · before a4e305ed60f7c41bbf9aabc16dd75267194e0de3affected · git
    • 4.16.12 and later · before 4.17affected · semver
    • before 4.17not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.162-16.1.162-1
Debian:13linuxbefore 6.12.69-16.12.69-1
Debian:14linuxbefore 6.18.8-16.18.8-1

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-2026-23016Jan 31, 2026 · inet: frags: drop fraglist conntrack references
    22Monitor
  • ← EarlierCVE-2026-23018Jan 31, 2026 · btrfs: release path before initializing extent tree in btrfs_read_locked_inode()
    22Monitor
  • Later →CVE-2026-23022Jan 31, 2026 · idpf: fix memory leak in idpf_vc_core_deinit()
    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 Linux053ac9e37eee435e999277c0f1ef890dad6064bfVendor (CNA)
Linux Linux28b2a805609699be7b90020ae7dccfb234be1cebVendor (CNA)
Linux Linux2f05f7737e16d9a40038cc1c38a96a3f7964898bVendor (CNA)
Linux Linux4.17Vendor (CNA)
Linux Linux606872c8e8bf96066730f6a2317502c5633c37f1Vendor (CNA)
Linux Linux6cff14b831dbdb32675b4c7904dcc3eeeaf47e9dVendor (CNA)
Linux Linuxa4e305ed60f7c41bbf9aabc16dd75267194e0de3Vendor (CNA)
Linux Linuxd82796a57cc0dac1dbef19d913c8f02a8cc7b1a7Vendor (CNA)
debian:linux6.1.162-1 · 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