VulnerabilityPublished 18 Oct 2026

CVE-2026-98481: Linux kernel · nfc: port100: reject frames whose declared length exceeds the received data

Source GCVE Database

Authoritative record:CVE-2026-98481· Medium

Not known to be exploited · fixed in e4da1452e10c6472a4bac48dc2f6a35fff1fcd69 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 13:47 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 11% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in e4da1452e10c6472a4bac48dc2f6a35fff1fcd69, db66a30588630c7de30ef033f00daddef69f6ad9, 035056e07ea65be670284246d9bc62f2f00ff4a3 +5

Exploitation evidence

Disclosed: evidence found.
CVE published 18 Oct 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-76wj-ccjf-8q4p

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06, < e4da1452e10c6472a4bac48dc2f6a35fff1fcd69	Fixed in e4da1452e10c6472a4bac48dc2f6a35fff1fcd69
LinuxLinux	Affected ≥ 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06, < db66a30588630c7de30ef033f00daddef69f6ad9	Fixed in db66a30588630c7de30ef033f00daddef69f6ad9
LinuxLinux	Affected ≥ 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06, < 035056e07ea65be670284246d9bc62f2f00ff4a3	Fixed in 035056e07ea65be670284246d9bc62f2f00ff4a3
LinuxLinux	Affected ≥ 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06, < 144ad477c381e2c592b64898d04ab4ce03b32861	Fixed in 144ad477c381e2c592b64898d04ab4ce03b32861
LinuxLinux	Affected ≥ 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06, < 092c6a605cbd6414ef499834c2e0da69c2c3388e	Fixed in 092c6a605cbd6414ef499834c2e0da69c2c3388e
LinuxLinux	Affected ≥ 562d4d59b8a1d5f3ca75115d6ac10c7b7bc68c06, < 14b1467cfc6630583650f33538174c5a1ec685ab	Fixed in 14b1467cfc6630583650f33538174c5a1ec685ab

AI-suggested

A fix has been implemented in the Linux kernel to reject frames where the declared length exceeds the received data length before validation. Users should apply the official Linux kernel updates that include this fix. Since this is a kernel-level vulnerability, updating to a patched kernel version is the recommended remediation.

Description

A vulnerability in the Linux kernel's NFC port100 driver allowed out-of-bounds reads due to improper validation of frame length fields. The driver did not verify that the declared frame length matched the actual received data length, leading to potential buffer over-read. This issue has been resolved by rejecting frames whose declared length exceeds the received data before validation.

References

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