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

CVE-2026-98577: nfc: llcp: fix WKS SAP hijacking via prefix match in nfc_llcp_wks_sap()

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 0a0412745c86acd089c6460da715ab966b1615e7, 0c83a8a45fed256ccc5fe7160b436b671fc79fb8, 32b5f0b338bf59391a1cff9a6190a72c4d2c1ba8; 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 0a0412745c86acd089c6460da715ab966b1615e7, 0c83a8a45fed256ccc5fe7160b436b671fc79fb8, 32b5f0b338bf59391a1cff9a6190a72c4d2c1ba8; 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: llcp: fix WKS SAP hijacking via prefix match in nfc_llcp_wks_sap() nfc_llcp_wks_sap() compares only service_name_len bytes, so a short service_name like "u" matches longer WKS strings like "urn:nfc:sn:snep". Fix by requiring exact length match before strncmp().

—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

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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

    • 3.3affected
    • d646960f7986fefb460a2b062d5ccc8ccfeacc3a and later · before 0c83a8a45fed256ccc5fe7160b436b671fc79fb8affected · git
    • d646960f7986fefb460a2b062d5ccc8ccfeacc3a and later · before aa555ed5ed0d15efbaf27e0e9f152a6df715278aaffected · git
    • d646960f7986fefb460a2b062d5ccc8ccfeacc3a and later · before 32b5f0b338bf59391a1cff9a6190a72c4d2c1ba8affected · git
    • d646960f7986fefb460a2b062d5ccc8ccfeacc3a and later · before 6fad2c34d451d11a9f3f946cae1105fee91d96b8affected · git
    • d646960f7986fefb460a2b062d5ccc8ccfeacc3a and later · before bf41af8f910cbb5d776a1dfa0671d31a7e262e28affected · git
    • d646960f7986fefb460a2b062d5ccc8ccfeacc3a and later · before f234197f3bda3aea5d4b1e591d6bcb3660a8b3fcaffected · git
    • d646960f7986fefb460a2b062d5ccc8ccfeacc3a and later · before 0a0412745c86acd089c6460da715ab966b1615e7affected · git
    • d646960f7986fefb460a2b062d5ccc8ccfeacc3a and later · before 408cff6bd60636df201274d320edfdfde9ed41dbaffected · git
    • before 3.3not 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-2026-98575Oct 18, 2026 · nfc: pn533: fix OOB read in pn533_acr122_is_rx_frame_valid()
    0Monitor
  • ← EarlierCVE-2026-98576Oct 18, 2026 · nfc: llcp: fix slab-out-of-bounds reads when logging service names
    0Monitor
  • Later →CVE-2026-98578Oct 18, 2026 · nfc: st21nfca: validate ISO15693 inventory length
    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 Linux0a0412745c86acd089c6460da715ab966b1615e7Vendor (CNA)
Linux Linux0c83a8a45fed256ccc5fe7160b436b671fc79fb8Vendor (CNA)
Linux Linux32b5f0b338bf59391a1cff9a6190a72c4d2c1ba8Vendor (CNA)
Linux Linux408cff6bd60636df201274d320edfdfde9ed41dbVendor (CNA)
Linux Linux6fad2c34d451d11a9f3f946cae1105fee91d96b8Vendor (CNA)
Linux Linuxaa555ed5ed0d15efbaf27e0e9f152a6df715278aVendor (CNA)
Linux Linuxbf41af8f910cbb5d776a1dfa0671d31a7e262e28Vendor (CNA)
Linux Linuxf234197f3bda3aea5d4b1e591d6bcb3660a8b3fcVendor (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 5, 2026+18 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