VulnerabilityPublished 18 Oct 2026

CVE-2026-98828: Linux kernel · wifi: ath9k: reject short WMI command responses

Source GCVE Database

Authoritative record:CVE-2026-98828· Medium

Not known to be exploited · fixed in e0c21130c1c7791ba73b19a3a9ea767c8cd43745 : 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 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in e0c21130c1c7791ba73b19a3a9ea767c8cd43745, a3b0137c855a61371d9cf9993b8bcc33c9798202, 93ce8ea70451e800601bc9444aa33043de15d67b +1

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-hwh7-fwf3-88qj

What to do

Upgrade Linux kernel to e0c21130c1c7791ba73b19a3a9ea767c8cd43745, a3b0137c855a61371d9cf9993b8bcc33c9798202, 93ce8ea70451e800601bc9444aa33043de15d67b or 03ef61d05aa26022327f971b790f07e6bf6e35d6.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ fb9987d0f748c983bb795a86f47522313f701a08, < e0c21130c1c7791ba73b19a3a9ea767c8cd43745	Fixed in e0c21130c1c7791ba73b19a3a9ea767c8cd43745
LinuxLinux	Affected ≥ fb9987d0f748c983bb795a86f47522313f701a08, < a3b0137c855a61371d9cf9993b8bcc33c9798202	Fixed in a3b0137c855a61371d9cf9993b8bcc33c9798202
LinuxLinux	Affected ≥ fb9987d0f748c983bb795a86f47522313f701a08, < 93ce8ea70451e800601bc9444aa33043de15d67b	Fixed in 93ce8ea70451e800601bc9444aa33043de15d67b
LinuxLinux	Affected ≥ fb9987d0f748c983bb795a86f47522313f701a08, < 03ef61d05aa26022327f971b790f07e6bf6e35d6	Fixed in 03ef61d05aa26022327f971b790f07e6bf6e35d6
LinuxLinux	Affected =2.6.35	Fixed in–
Debiandebian/linux`pkg:deb/debian/linux`Other threats	Affected =2.6.35	Fixed in–

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 implemented in the Linux kernel to handle short WMI command responses correctly by recording an error and preventing stale data consumption. Users should update to the fixed Linux kernel version containing this patch. No additional mitigations are indicated.

Description

A vulnerability in the Linux kernel's ath9k wireless driver was resolved that involved improper handling of short WMI command responses. The function ath9k_wmi_rsp_callback() could read beyond the expected response buffer if the device response was shorter than anticipated, potentially leading to memory safety issues. The fix involves detecting short responses, recording an error, and preventing stale data consumption.

References

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