VulnerabilityPublished 18 Oct 2026

CVE-2026-98827: Linux kernel · wifi: ath9k_htc: bound TX aggregation to MAX_TX_BUF_SIZE

Source GCVE Database

Authoritative record:CVE-2026-98827· Medium

Not known to be exploited · fixed in e73a619f91b6cfec47bc1a94aea28df6849e5be3 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:05 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 e73a619f91b6cfec47bc1a94aea28df6849e5be3, c18882768a0fe253c70986c5fe66d9241570fbc4, aeaca27c1db3106967ffbb2b517d98c835f6d500 +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-x38j-g3ww-cf25

What to do

Upgrade Linux kernel to e73a619f91b6cfec47bc1a94aea28df6849e5be3, c18882768a0fe253c70986c5fe66d9241570fbc4, aeaca27c1db3106967ffbb2b517d98c835f6d500 or 345ce265cf604e84b5b560c21beaf4c6f269ab14.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ fb9987d0f748c983bb795a86f47522313f701a08, < e73a619f91b6cfec47bc1a94aea28df6849e5be3	Fixed in e73a619f91b6cfec47bc1a94aea28df6849e5be3
LinuxLinux	Affected ≥ fb9987d0f748c983bb795a86f47522313f701a08, < c18882768a0fe253c70986c5fe66d9241570fbc4	Fixed in c18882768a0fe253c70986c5fe66d9241570fbc4
LinuxLinux	Affected ≥ fb9987d0f748c983bb795a86f47522313f701a08, < aeaca27c1db3106967ffbb2b517d98c835f6d500	Fixed in aeaca27c1db3106967ffbb2b517d98c835f6d500
LinuxLinux	Affected ≥ fb9987d0f748c983bb795a86f47522313f701a08, < 345ce265cf604e84b5b560c21beaf4c6f269ab14	Fixed in 345ce265cf604e84b5b560c21beaf4c6f269ab14
LinuxLinux	Affected =2.6.35	Fixed in–

AI-suggested

A fix has been implemented in the Linux kernel to bound TX aggregation by the maximum transmit buffer size and correctly manage transmit buffer length. Users should apply the official Linux kernel updates that include this fix. No additional mitigation is required beyond applying the patch.

Description

A vulnerability in the Linux kernel's ath9k_htc wifi driver was resolved by bounding TX aggregation to the maximum transmit buffer size. The issue involved the __hif_usb_tx() function dequeuing up to 20 frames without limiting the cumulative byte length, causing a buffer overflow when large frames were aggregated. The fix ensures the loop stops before exceeding the buffer size, preventing memory corruption and frame loss.

References

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