VulnerabilityPublished 18 Oct 2026Updated 21 Oct 2026

CVE-2026-98830: Linux kernel · wifi: wfx: validate MIB read length before copying to caller

Source GCVE Database

Authoritative record:CVE-2026-98830

Not known to be exploited · fixed in ce67ebe9d8629776ce38e6995ae72fb903c828db : update Linux kernel when convenient.

Data as of 26 Oct 2026, 17:16 UTC

Severity

Medium

Rated by Threat Radar · CVSS not yet scored by NVD

EPSS: 0.2% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in ce67ebe9d8629776ce38e6995ae72fb903c828db, 02886c18a340da59df57365f29009e1258bfe333, 819d4c1323e2a9b7329021d5367aa01add22b5dc +2

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-m222-4jcj-v2hx

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ f95a29d40782f4f0052a692a822de3ba044b19ff, < ce67ebe9d8629776ce38e6995ae72fb903c828db	Fixed in ce67ebe9d8629776ce38e6995ae72fb903c828db
LinuxLinux	Affected ≥ f95a29d40782f4f0052a692a822de3ba044b19ff, < 02886c18a340da59df57365f29009e1258bfe333	Fixed in 02886c18a340da59df57365f29009e1258bfe333
LinuxLinux	Affected ≥ f95a29d40782f4f0052a692a822de3ba044b19ff, < 819d4c1323e2a9b7329021d5367aa01add22b5dc	Fixed in 819d4c1323e2a9b7329021d5367aa01add22b5dc
LinuxLinux	Affected ≥ f95a29d40782f4f0052a692a822de3ba044b19ff, < 71d140099165de03128c00dd129f1eab21c6a3c4	Fixed in 71d140099165de03128c00dd129f1eab21c6a3c4
LinuxLinux	Affected ≥ f95a29d40782f4f0052a692a822de3ba044b19ff, < 7acb36fd60a3e7b858f12e69a919c3609b281408	Fixed in 7acb36fd60a3e7b858f12e69a919c3609b281408
LinuxLinux	Affected =5.5	Fixed in–

AI-suggested

A fix has been implemented that validates the reply length before copying data, preventing buffer over-read. Users should apply the official Linux kernel update that includes this patch to remediate the vulnerability.

Description

A vulnerability in the Linux kernel's wifi wfx driver was resolved by adding validation of the MIB read length before copying data to the caller. The function wfx_hif_read_mib() previously copied reply->length bytes from the firmware response into a caller buffer without verifying that reply->length did not exceed the buffer size val_len. This could lead to a buffer over-read and potential memory corruption. The fix replaces a non-functional -ENOMEM check with an active validation to ensure reply->length fits within val_len before memcpy.

References

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