VulnerabilityPublished 18 Oct 2026

CVE-2026-98711: Linux kernel · wifi: cw1200: fix TX padding OOB read leaking heap data to device

Source GCVE Database

Authoritative record:CVE-2026-98711

Not known to be exploited · fixed in b66539a4dab128fafaad736b53ce15c19d14d561 : 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: 0.1% chance of exploitation in 30 days – higher than 5% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in b66539a4dab128fafaad736b53ce15c19d14d561, b0e97bd40e0c2cb1a3530ef8f6250aacf3224515, 678c8f4ba285649d5418a858d5d4f30c728a54ad +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-rfqv-xwf2-63qv

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ a910e4a94f6923c8c988565525f017f687bf7205, < b66539a4dab128fafaad736b53ce15c19d14d561	Fixed in b66539a4dab128fafaad736b53ce15c19d14d561
LinuxLinux	Affected ≥ a910e4a94f6923c8c988565525f017f687bf7205, < b0e97bd40e0c2cb1a3530ef8f6250aacf3224515	Fixed in b0e97bd40e0c2cb1a3530ef8f6250aacf3224515
LinuxLinux	Affected ≥ a910e4a94f6923c8c988565525f017f687bf7205, < 678c8f4ba285649d5418a858d5d4f30c728a54ad	Fixed in 678c8f4ba285649d5418a858d5d4f30c728a54ad
LinuxLinux	Affected ≥ a910e4a94f6923c8c988565525f017f687bf7205, < 71f693a0ecccf36532dd2790f7969da6c71d5d23	Fixed in 71f693a0ecccf36532dd2790f7969da6c71d5d23
LinuxLinux	Affected ≥ a910e4a94f6923c8c988565525f017f687bf7205, < 7c1611780823b76219cb1478db53dfd890c4a9a2	Fixed in 7c1611780823b76219cb1478db53dfd890c4a9a2
LinuxLinux	Affected =3.11	Fixed in–

AI-suggested

A fix has been implemented in the Linux kernel cw1200 driver to correctly compute and zero TX padding bytes, preventing out-of-bounds reads and data leakage. Users should apply the official kernel update containing this fix. No additional mitigation is indicated.

Description

A vulnerability in the Linux kernel's cw1200 WiFi driver allowed out-of-bounds reads during TX padding, leaking up to 511 bytes of kernel heap data to the device. The issue was caused by reading beyond the frame buffer when padding the transfer size for bus alignment. The vulnerability has been resolved by correctly computing padding, ensuring sufficient tailroom, and zeroing padding bytes before transfer.

References

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