BlackTreeIndependent security intelligence

Full vulnerability report · 2026

CVE-2026-68352High confidence

wifi: ath6kl: fix OOB read from firmware IE lengths in connect event

Linux · Linux

8.3HighCVSS 3.1

Recommended action

Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available

Distribution package intelligence

Ubuntu vendor package status

Canonical’s release and source-package findings are shown separately from local repository availability.

20 package states

Repository candidate not checked

A published vendor fix does not prove that a matching update is enabled and installable on a particular asset. Confirm the local package candidate before scheduling remediation.

Ubuntu release	Source package	Vendor state	Fixed version	Evidence
Ubuntu 24.04 LTSnoble · standard archive	`linux`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-aws`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-azure`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-azure-fde`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-azure-nvidia`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-gcp`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-gke`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-gkeop`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-ibm`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-lowlatency`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-nvidia`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-nvidia-lowlatency`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-nvidia-tegra`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-oem-6.11`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-oracle`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-raspi`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-raspi-realtime`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-realtime`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-riscv`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026
Ubuntu 24.04 LTSnoble · standard archive	`linux-xilinx`	Affected, no fix publishedCanonical OVAL identifies this running kernel flavour as affected and does not publish a fixed package version in this definition.	`Not published in this feed`	Canonical record ↗Source updated 8 Sept 2026

Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current

CVE-2026-68352 · CSAF 2.0 · revision 3 · finalRed Hat Product Securitykernel: wifi: ath6kl: fix OOB read from firmware IE lengths in connect event

158 known affected

The vendor explicitly identifies these products as affected by this CVE.

bpftool as a component of Red Hat Enterprise Linux 7
kernel as a component of Red Hat Enterprise Linux 7
kernel-abi-whitelists as a component of Red Hat Enterprise Linux 7
kernel-bootwrapper as a component of Red Hat Enterprise Linux 7
kernel-debug as a component of Red Hat Enterprise Linux 7
kernel-debug-devel as a component of Red Hat Enterprise Linux 7
kernel-devel as a component of Red Hat Enterprise Linux 7
kernel-doc as a component of Red Hat Enterprise Linux 7
kernel-headers as a component of Red Hat Enterprise Linux 7
kernel-kdump as a component of Red Hat Enterprise Linux 7
kernel-kdump-devel as a component of Red Hat Enterprise Linux 7
kernel-tools as a component of Red Hat Enterprise Linux 7

Summary: A flaw was found in the Linux kernel's ath6kl Wi-Fi driver. The driver does not properly validate the lengths of firmware-controlled information elements (IEs) during a connect event. This vulnerability allows the sum of these lengths to exceed the allocated buffer, resulting in an out-of-bounds read. An attacker could exploit this to cause state corruption within the driver, potentially leading to a denial of service.
Remediation: To mitigate this issue, prevent the ath6kl module from loading. See https://access.redhat.com/solutions/41278 for instructions.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current

ENISA EUVD identifier

EUVD-2026-55453

No EUVD known-exploited evidence

In the Linux kernel, the following vulnerability has been resolved: wifi: ath6kl: fix OOB read from firmware IE lengths in connect event The firmware-controlled beacon_ie_len, assoc_req_len, and assoc_resp_len fields in ath6kl_wmi_connect_event_rx() are not validated against the buffer length. Their sum (up to 765) can exceed the actual WMI event data, causing out-of-bounds reads during IE parsing and state corruption of wmi->is_wmm_enabled. Add a check that the total IE length fits within the buffer.

EUVD state: Present in the current official mapping
Known exploitation: Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score: 8.3 · CVSS 3.1
Advisory evidence: No linked advisory details stored yet

Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available

What, why and how

What

Why

The current structured CVE record identifies a security weakness, but the root cause requires confirmation in the linked vendor material.

How

An attacker operating through an adjacent network may attempt exploitation without authentication or user interaction. If successful, the issue may cause the confidentiality, integrity or availability impact described by the vendor.

What

Why

The current structured CVE record identifies a security weakness, but the root cause requires confirmation in the linked vendor material.

How

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path: an adjacent network → vulnerable operation → cause the confidentiality, integrity or availability impact described by the vendor
Attack surface: Adjacent
Privileges required: None: unauthenticated exploitation is possible
User interaction: None
Attack complexity: Low: no specialised conditions are recorded
Security boundary: Unchanged: impact remains within the vulnerable component's security authority
Weakness ? CWE means Common Weakness Enumeration.: CWE not yet assigned
CVSS vector ? CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:H
Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVAdjacentAttack vector: The attacker must be on an adjacent or logically close network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.ILowIntegrity impact: A successful attack can cause a limited loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land: No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.

Unauthenticated

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-55453Official EUVD mapping

Official EUVD record

BSI · German · WID-SEC-W-2026-2730Linux Kernel: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen im Linux Kernel ausnutzen, um einen nicht näher spezifizierten Angriff durchzuführen, darunter möglicherweise die Ausführung von beliebigem Code, die Ausweitung von Berechtigungen, die Offenlegung von Informationen, die Manipulation von Daten oder Denial-of-Service-Zustände.

Official advisory

CERT-FR · French · CERTFR-2026-AVI-1069Multiples vulnérabilités dans le noyau Linux de Debian LTS

d?id=CVE-2026-68339 Référence CVE CVE-2026-68340 https://www.cve.org/CVERecord?id=CVE-2026-68340 Référence CVE CVE-2026-68343 https://www.cve.org/CVERecord?id=CVE-2026-68343 Référence CVE CVE-2026-68344 https://www.cve.org/CVERecord?id=CVE-2026-68344 Référence CVE CVE-2026-68346 https://www.cve.org/CVERecord?id=CVE-2026-68346 Référence CVE CVE-2026-68348 https://www.cve.org/CVERecord?id=CVE-2026-68348 Référence CVE CVE-2026-68349 https://www.cve.org/CVERecord?id=CVE-2026-68349 Référence CVE CVE-2026-68350 https://www.cve.org/CVERecord?id=CVE-2026-68350 Référence CVE CVE-2026-68351 https://www.cve.org/CVERecord?id=CVE-2026-68351 Référence CVE CVE-2026-68352 https://www.cve.org/CVERecord?id=CVE-2026-68352 Référence CVE CVE-2026-68353 https://www.cve.org/CVERecord?id=CVE-2026-68353 Référence CVE CVE-2026-68354 https://www.cve.org/CVERecord?id=CVE-2026-68354 Référence CVE CVE-2026-68355 https://www.cve.org/CVERecord?id=CVE-2026-68355 Référence CVE CVE-2026-68357 https://www.cve.org/CVERecord?id=CVE-2026-68357 Référence CVE CVE-2026-68358 https://www.cve.org/CVERecord?id=CVE-2026-68358 Référence CVE CVE-2026-68359 https://www.cve.org/CVERecord?id=CVE-2026-68359 Référence CVE CVE-2026-68360 https://www.cve.org/CVERecord?id=CVE-2026-68360 Référence CVE CVE-2026-68361 https://www.cve.org/CVERecord?id=

Official advisory

Patch and workaround

Operational remediation based on structured source evidence.

Status ? Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.: Patch available
Affected: bpftool as a component of Red Hat Enterprise Linux 7; kernel as a component of Red Hat Enterprise Linux 7; kernel-abi-whitelists as a component of Red Hat Enterprise Linux 7; kernel-bootwrapper as a component of Red Hat Enterprise Linux 7; kernel-debug as a component of Red Hat Enterprise Linux 7; kernel-debug-devel as a component of Red Hat Enterprise Linux 7; kernel-devel as a component of Red Hat Enterprise Linux 7; kernel-doc as a component of Red Hat Enterprise Linux 7; kernel-headers as a component of Red Hat Enterprise Linux 7; kernel-kdump as a component of Red Hat Enterprise Linux 7; kernel-kdump-devel as a component of Red Hat Enterprise Linux 7; kernel-tools as a component of Red Hat Enterprise Linux 7; kernel-tools-libs as a component of Red Hat Enterprise Linux 7; kernel-tools-libs-devel as a component of Red Hat Enterprise Linux 7; kernel.src as a component of Red Hat Enterprise Linux 7; perf as a component of Red Hat Enterprise Linux 7; python-perf as a component of Red Hat Enterprise Linux 7; bpftool as a component of Red Hat Enterprise Linux 8; kernel as a component of Red Hat Enterprise Linux 8; kernel-abi-stablelists as a component of Red Hat Enterprise Linux 8; kernel-abi-whitelists as a component of Red Hat Enterprise Linux 8; kernel-core as a component of Red Hat Enterprise Linux 8; kernel-cross-headers as a component of Red Hat Enterprise Linux 8; kernel-debug as a component of Red Hat Enterprise Linux 8; kernel-debug-core as a component of Red Hat Enterprise Linux 8; kernel-debug-devel as a component of Red Hat Enterprise Linux 8; kernel-debug-modules as a component of Red Hat Enterprise Linux 8; kernel-debug-modules-extra as a component of Red Hat Enterprise Linux 8; kernel-debug-modules-internal as a component of Red Hat Enterprise Linux 8; kernel-devel as a component of Red Hat Enterprise Linux 8; and 128 more
Fixed: < 3.2; 5.10.265 ≤ 5.10.*; 5.15.216 ≤ 5.15.*; 6.1.183 ≤ 6.1.*; 6.6.148 ≤ 6.6.*; 6.12.101 ≤ 6.12.*; 6.18.42 ≤ 6.18.*; 7.1.6 ≤ 7.1.*
Action: Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround: To mitigate this issue, prevent the ath6kl module from loading. See https://access.redhat.com/solutions/41278 for instructions.

Evidence and provenance

Published 10 Aug 2026 · Last source change 19 Aug 2026, 16:33 UTC · CWE not yet assigned

CVE recordCVE.org · 5.2

CVSS sourceCNA

EPSS source

The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.

FIRST · tracked since 2026-08-14

European sourceENISA EUVD · EUVD-2026-55453

Product sourceVendor CSAF · Red Hat Product Security

Remediation sourceVendor CSAF · Red Hat Product Security

CWE sourceUnavailable

NVD statusNVD received

Missing structured fields: CWE classification. Missing data is not evidence of low risk; review the primary advisory.

Material change intelligence

What changed after publication

View recent updates →

25 Aug 2026, 01:27 UTC
Vendor guidanceAuthoritative vendor guidance changed from authoritative remediation link to authoritative remediation link.
Before
authoritative remediation link
After
authoritative remediation link
Red Hat Product Security ↗
25 Aug 2026, 01:27 UTC
Remediation statusRemediation status changed from Awaiting fix to Mitigation available.
Before
Awaiting fix
After
Mitigation available
Red Hat Product Security ↗
19 Aug 2026, 16:33 UTC
Vendor guidanceAuthoritative vendor guidance changed from authoritative remediation link to authoritative remediation link.
Before
authoritative remediation link
After
authoritative remediation link
CNA ↗
19 Aug 2026, 16:33 UTC
Affected versionsThe structured affected or fixed version information changed.
Before
bdcd81707973cf8aa9305337166f8ee842a050d4 < 1c690f7c4c5b37108ac8c98b94ce1b3c655a4f5e; bdcd81707973cf8aa9305337166f8ee842a050d4 < d70c0a850c21b57a6f46ce363860203389bbeaa6; bdcd81707973cf8aa9305337166f8ee842a050d4 < 33b5342d2080657054ddf89ef1199b426a37dae8; bdcd81707973cf8aa9305337166f8ee842a050d4 < 94e1bfcefe8264a207c2fda2febb954e70a34b42; bdcd81707973cf8aa9305337166f8ee842a050d4 < 6b47b29730de3232b919d8362749f6814c5f2a33; 3.2 · Fixed: < 3.2; 6.6.148 ≤ 6.6.*; 6.12.101 ≤ 6.12.*; 6.18.42 ≤ 6.18.*; 7.1.6 ≤ 7.1.*; 7.2 ≤ *
After
bdcd81707973cf8aa9305337166f8ee842a050d4 < 7cae33e3e09a080db96e3a8980c2c8d288318320; bdcd81707973cf8aa9305337166f8ee842a050d4 < 1eeed9efc9a40e0635e910c37fee86543041b4e1; bdcd81707973cf8aa9305337166f8ee842a050d4 < a38d7d6376b295245b53bc98b7ca682c027abaf7; bdcd81707973cf8aa9305337166f8ee842a050d4 < 1c690f7c4c5b37108ac8c98b94ce1b3c655a4f5e; bdcd81707973cf8aa9305337166f8ee842a050d4 < d70c0a850c21b57a6f46ce363860203389bbeaa6; bdcd81707973cf8aa9305337166f8ee842a050d4 < 33b5342d2080657054ddf89ef1199b426a37dae8; bdcd81707973cf8aa9305337166f8ee842a050d4 < 94e1bfcefe8264a207c2fda2febb954e70a34b42; bdcd81707973cf8aa9305337166f8ee842a050d4 < 6b47b29730de3232b919d8362749f6814c5f2a33 · Fixed: < 3.2; 5.10.265 ≤ 5.10.*; 5.15.216 ≤ 5.15.*; 6.1.183 ≤ 6.1.*; 6.6.148 ≤ 6.6.*; 6.12.101 ≤ 6.12.*; 6.18.42 ≤ 6.18.*; 7.1.6 ≤ 7.1.*
CNA ↗
17 Aug 2026, 05:03 UTC
Affected versionsThe structured affected or fixed version information changed.
Before
bdcd81707973cf8aa9305337166f8ee842a050d4 < 1c690f7c4c5b37108ac8c98b94ce1b3c655a4f5e; bdcd81707973cf8aa9305337166f8ee842a050d4 < d70c0a850c21b57a6f46ce363860203389bbeaa6; bdcd81707973cf8aa9305337166f8ee842a050d4 < 33b5342d2080657054ddf89ef1199b426a37dae8; bdcd81707973cf8aa9305337166f8ee842a050d4 < 94e1bfcefe8264a207c2fda2febb954e70a34b42; bdcd81707973cf8aa9305337166f8ee842a050d4 < 6b47b29730de3232b919d8362749f6814c5f2a33; 3.2 · Fixed: < 3.2; 6.6.148 ≤ 6.6.*; 6.12.101 ≤ 6.12.*; 6.18.42 ≤ 6.18.*; 7.1.6 ≤ 7.1.*; 7.2-rc5 ≤ *
After
bdcd81707973cf8aa9305337166f8ee842a050d4 < 1c690f7c4c5b37108ac8c98b94ce1b3c655a4f5e; bdcd81707973cf8aa9305337166f8ee842a050d4 < d70c0a850c21b57a6f46ce363860203389bbeaa6; bdcd81707973cf8aa9305337166f8ee842a050d4 < 33b5342d2080657054ddf89ef1199b426a37dae8; bdcd81707973cf8aa9305337166f8ee842a050d4 < 94e1bfcefe8264a207c2fda2febb954e70a34b42; bdcd81707973cf8aa9305337166f8ee842a050d4 < 6b47b29730de3232b919d8362749f6814c5f2a33; 3.2 · Fixed: < 3.2; 6.6.148 ≤ 6.6.*; 6.12.101 ≤ 6.12.*; 6.18.42 ≤ 6.18.*; 7.1.6 ≤ 7.1.*; 7.2 ≤ *
CNA ↗

2026-08-10CVE published

2026-08-19Fixed release or patch reference recorded

ENISA EUVD · EUVD-2026-55453↗Vendor CSAF · Red Hat Product Security↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗

Technical terms and abbreviations used in this report

CVE: Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS: Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS: Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE: Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA: CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP: Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD: National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT: A computer security incident response team that publishes warnings or coordinates incident response.
PoC: Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF: Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL: Living off the land: abuse of legitimate tools or system functions during an attack.