CVE-2026-90361Hinoki check available

Kernel-memory leak via omitted TLV error-path cleanup

Published Sep 17, 2026 · Updated Sep 17, 2026

Linux's ath11k Wi-Fi driver allows attackers to consume kernel memory via a parsing failure in a service-ready TLV event. In ath11k_service_ready_ext_event(), the error path fails to free svc_rdy_ext.mac_phy_caps after allocation succeeds but a later TLV fails parsing. Exposure requires an ath11k-equipped system reaching that error path; public evidence does not explain attacker control of the event or demonstrate a hang or crash.

CVSS severity5.5
Medium
EPSS probability0.21%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkAvailable
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Summary

What happened

Linux's ath11k Wi-Fi driver allows attackers to consume kernel memory via a parsing failure in a service-ready TLV event. In ath11k_service_ready_ext_event(), the error path fails to free svc_rdy_ext.mac_phy_caps after allocation succeeds but a later TLV fails parsing. Exposure requires an ath11k-equipped system reaching that error path; public evidence does not explain attacker control of the event or demonstrate a hang or crash.

The record

CVE
CVE-2026-90361
Published
Sep 17, 2026
Updated
Sep 17, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-772
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Sep 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=5.6
  2. Affected versionversion=5b90fc760db5a969ed26d70f8e62c91915f012bd <0293be2212d319d59589082461abf2a9b626cd1c
  3. Affected versionversion=5b90fc760db5a969ed26d70f8e62c91915f012bd <047a817147806140cdef5fa25d69d7b7a24f905c
  4. Affected versionversion=5b90fc760db5a969ed26d70f8e62c91915f012bd <10ccd92825504c029390874c6fb84c62d9f263f9
  5. Affected versionversion=5b90fc760db5a969ed26d70f8e62c91915f012bd <1296cae53052881ddd571a9d4f467a16ebfb7f14
  6. Affected versionversion=5b90fc760db5a969ed26d70f8e62c91915f012bd <35cb3086b426b3468cfc32d0d8d9883409705ea9
  7. Affected versionversion=5b90fc760db5a969ed26d70f8e62c91915f012bd <7dbf0bc50cf3ddd039becd875691bb7f484fa004
  8. Affected versionversion=5b90fc760db5a969ed26d70f8e62c91915f012bd <854eb9053a793b73c4e8082e1923735a80c77bcd
  9. Affected versionversion=5b90fc760db5a969ed26d70f8e62c91915f012bd <f5bb3471c9f46c6cabc06a152c13fc518330913e

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=5.6; version=5b90fc760db5a969ed26d70f8e62c91915f012bd <0293be2212d319d59589082461abf2a9b626cd1c; version=5b90fc760db5a969ed26d70f8e62c91915f012bd <047a817147806140cdef5fa25d69d7b7a24f905c; version=5b90fc760db5a969ed26d70f8e62c91915f012bd <10ccd92825504c029390874c6fb84c62d9f263f9; version=5b90fc760db5a969ed26d70f8e62c91915f012bd <1296cae53052881ddd571a9d4f467a16ebfb7f14; version=5b90fc760db5a969ed26d70f8e62c91915f012bd <35cb3086b426b3468cfc32d0d8d9883409705ea9; version=5b90fc760db5a969ed26d70f8e62c91915f012bd <7dbf0bc50cf3ddd039becd875691bb7f484fa004; version=5b90fc760db5a969ed26d70f8e62c91915f012bd <854eb9053a793b73c4e8082e1923735a80c77bcd; version=5b90fc760db5a969ed26d70f8e62c91915f012bd <f5bb3471c9f46c6cabc06a152c13fc518330913e

Published CVSS scores

5.5Red HatCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
2.5Amazon LinuxCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-772Missing Release of Resource after Effective Lifetime

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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