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CVE.org (no NVD analysis yet)· CNA Linux

CVE-2026-98583: nfc: nfcmrvl: validate helper command length before pull

Noroxi assessment

Priority: Monitor (action score 0/100)

  • 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: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 4d4601e182c8567329be7d919669ec4d847ddd93, 686f942332b1667f13f3b8d6a2f50bcfbf42e277, 6a17a5806e9fcd99cf0dd30c3e6301f2aa1fac3c; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.159.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 4d4601e182c8567329be7d919669ec4d847ddd93, 686f942332b1667f13f3b8d6a2f50bcfbf42e277, 6a17a5806e9fcd99cf0dd30c3e6301f2aa1fac3c; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.159.1-1 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: nfc: nfcmrvl: validate helper command length before pull The firmware download receive path removes the NCI data header and reads the helper command before validating the remaining packet length. A short frame can therefore reach the data access before the malformed packet is rejected. Validate the complete helper command length before stripping the NCI data header.

—No exploit Fix available
Published
Oct 18, 2026
Updated
Oct 19, 2026
EPSS
0.2% · 12th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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-2026-98583

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.

—

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

    • 4.4affected
    • 3194c6870158e305dac2af52f83681e9cb67280f and later · before 842c0603cfa49530ef081f181a2ddbba77a37231affected · git
    • 3194c6870158e305dac2af52f83681e9cb67280f and later · before e4b012240c8aaf57cec192234c24e0db5f531ffaaffected · git
    • 3194c6870158e305dac2af52f83681e9cb67280f and later · before f15ad9d6e9173a037587dded77c904fdae8df380affected · git
    • 3194c6870158e305dac2af52f83681e9cb67280f and later · before a4e56f57dd04d8f9bc6bc55f90f3d129da759ec9affected · git
    • 3194c6870158e305dac2af52f83681e9cb67280f and later · before 4d4601e182c8567329be7d919669ec4d847ddd93affected · git
    • 3194c6870158e305dac2af52f83681e9cb67280f and later · before ed2e00bb22c73156bf8030b6204deabb25cf4eb5affected · git
    • 3194c6870158e305dac2af52f83681e9cb67280f and later · before 6a17a5806e9fcd99cf0dd30c3e6301f2aa1fac3caffected · git
    • 3194c6870158e305dac2af52f83681e9cb67280f and later · before 686f942332b1667f13f3b8d6a2f50bcfbf42e277affected · git
    • before 4.4not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.113-1~deb12u16.12.113-1~deb12u1
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.9-17.2.9-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-98581Oct 18, 2026 · nfc: llcp: Fix list corruption / refcount desync in nfc_llcp_recv_dm()
    0Monitor
  • ← EarlierCVE-2026-98582Oct 18, 2026 · nfc: st21nfca: validate received frame size
    0Monitor
  • Later →CVE-2026-98584Oct 18, 2026 · net/sched: fix potential stack infoleak in em_text_dump()
    0Monitor

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 Linux4d4601e182c8567329be7d919669ec4d847ddd93Vendor (CNA)
Linux Linux686f942332b1667f13f3b8d6a2f50bcfbf42e277Vendor (CNA)
Linux Linux6a17a5806e9fcd99cf0dd30c3e6301f2aa1fac3cVendor (CNA)
Linux Linux842c0603cfa49530ef081f181a2ddbba77a37231Vendor (CNA)
Linux Linuxa4e56f57dd04d8f9bc6bc55f90f3d129da759ec9Vendor (CNA)
Linux Linuxe4b012240c8aaf57cec192234c24e0db5f531ffaVendor (CNA)
Linux Linuxed2e00bb22c73156bf8030b6204deabb25cf4eb5Vendor (CNA)
Linux Linuxf15ad9d6e9173a037587dded77c904fdae8df380Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.06.6.159.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux-6.126.12.113-1~deb12u1 · 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.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 6, 2026+19 d
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

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

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. Exploit maturity— → none
  2. 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