VulnerabilityPublished 18 Oct 2026

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

Source GCVE Database

Authoritative record:CVE-2026-98583· Medium

Not known to be exploited · fixed in f15ad9d6e9173a037587dded77c904fdae8df380 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 12:55 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 f15ad9d6e9173a037587dded77c904fdae8df380, ed2e00bb22c73156bf8030b6204deabb25cf4eb5, e4b012240c8aaf57cec192234c24e0db5f531ffa +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-fgwh-2g3x-83j6

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 3194c6870158e305dac2af52f83681e9cb67280f, < f15ad9d6e9173a037587dded77c904fdae8df380	Fixed in f15ad9d6e9173a037587dded77c904fdae8df380
LinuxLinux	Affected ≥ 3194c6870158e305dac2af52f83681e9cb67280f, < ed2e00bb22c73156bf8030b6204deabb25cf4eb5	Fixed in ed2e00bb22c73156bf8030b6204deabb25cf4eb5
LinuxLinux	Affected ≥ 3194c6870158e305dac2af52f83681e9cb67280f, < e4b012240c8aaf57cec192234c24e0db5f531ffa	Fixed in e4b012240c8aaf57cec192234c24e0db5f531ffa
LinuxLinux	Affected ≥ 3194c6870158e305dac2af52f83681e9cb67280f, < a4e56f57dd04d8f9bc6bc55f90f3d129da759ec9	Fixed in a4e56f57dd04d8f9bc6bc55f90f3d129da759ec9
LinuxLinux	Affected ≥ 3194c6870158e305dac2af52f83681e9cb67280f, < 842c0603cfa49530ef081f181a2ddbba77a37231	Fixed in 842c0603cfa49530ef081f181a2ddbba77a37231
LinuxLinux	Affected ≥ 3194c6870158e305dac2af52f83681e9cb67280f, < 686f942332b1667f13f3b8d6a2f50bcfbf42e277	Fixed in 686f942332b1667f13f3b8d6a2f50bcfbf42e277

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

A fix has been applied to the Linux kernel to validate the complete helper command length before processing. Users should update to the fixed kernel version containing this patch. No additional mitigation steps are indicated.

Description

A vulnerability in the Linux kernel's NFC driver (nfcmrvl) was resolved by validating the helper command length before processing. The flaw involved reading the helper command before confirming the packet length, allowing malformed short frames to be accessed improperly. The fix ensures the complete helper command length is validated before removing the NCI data header.

References

Community reviews

Loading reviews…