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CVE-2021-47149· NVD / CVE Program· CNA Linux

net: fujitsu: fix potential null-ptr-deref

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: 0.22% (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 22049c3d40f08facd1867548716a484dad6b3251, 52202be1cd996cde6e8969a128dc27ee45a7cb5e, 6dbf1101594f7c76990b63c35b5a40205a914b6b.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 22049c3d40f08facd1867548716a484dad6b3251, 52202be1cd996cde6e8969a128dc27ee45a7cb5e, 6dbf1101594f7c76990b63c35b5a40205a914b6b 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: fujitsu: fix potential null-ptr-deref In fmvj18x_get_hwinfo(), if ioremap fails there will be NULL pointer deref. To fix this, check the return value of ioremap and return -1 to the caller in case of failure.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Mar 25, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 12th 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 · 0.2%

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-2021-47149

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 kernelbefore 4.4.271
  • linux linux kernel4.5 and later · before 4.9.271
  • linux linux kernel4.10 and later · before 4.14.235
  • linux linux kernel4.15 and later · before 4.19.193
  • linux linux kernel4.20 and later · before 5.4.124
  • linux linux kernel5.5 and later · before 5.10.42
  • linux linux kernel5.11 and later · before 5.12.9
  • linux linux kernel5.13

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

    • 2.6.12affected
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before b92170e209f7746ed72eaac98f2c2f4b9af734e6affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 6dbf1101594f7c76990b63c35b5a40205a914b6baffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before c4f1c23edbe921ab2ecd6140d700e756cd44c5f7affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 7883d3895d0fbb0ba9bff0f8665f99974b45210faffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 22049c3d40f08facd1867548716a484dad6b3251affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 71723a796ab7881f491d663c6cd94b29be5fba50affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before f14bf57a08779a5dee9936f63ada0149ea89c5e6affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 52202be1cd996cde6e8969a128dc27ee45a7cb5eaffected · git
    • before 2.6.12not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.14.6-15.14.6-1

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-2021-47147Mar 25, 2024 · ptp: ocp: Fix a resource leak in an error handling path
    24Monitor
  • ← EarlierCVE-2021-47148Mar 25, 2024 · octeontx2-pf: fix a buffer overflow in otx2_set_rxfh_context()
    31Monitor
  • Later →CVE-2021-47150Mar 25, 2024 · net: fec: fix the potential memory leak in fec_enet_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 Linux22049c3d40f08facd1867548716a484dad6b3251Vendor (CNA)
Linux Linux52202be1cd996cde6e8969a128dc27ee45a7cb5eVendor (CNA)
Linux Linux6dbf1101594f7c76990b63c35b5a40205a914b6bVendor (CNA)
Linux Linux71723a796ab7881f491d663c6cd94b29be5fba50Vendor (CNA)
Linux Linux7883d3895d0fbb0ba9bff0f8665f99974b45210fVendor (CNA)
Linux Linuxb92170e209f7746ed72eaac98f2c2f4b9af734e6Vendor (CNA)
Linux Linuxc4f1c23edbe921ab2ecd6140d700e756cd44c5f7Vendor (CNA)
Linux Linuxf14bf57a08779a5dee9936f63ada0149ea89c5e6Vendor (CNA)
debian:linux5.14.6-1 · 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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

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