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CVE Record

CVE-2024-43847: wifi: ath12k: fix invalid memory access while processing fragmented packets

In the Linux kernel, the following vulnerability has been resolved: wifi: ath12k: fix invalid memory access while processing fragmented packets The monitor ring and the reo reinject ring share the same ring mask index. When the driver receives an interrupt for the reo reinject ring, the monitor ring is also processed, leading to invalid memory access. Since monitor support is not yet enabled in ath12k, the ring mask for the monitor ring should be removed. Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.1.1-00209-QCAHKSWPL_SILICONZ-1

HighCVSS 8.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

A Linux ath12k Wi-Fi driver flaw can cause invalid memory access while processing fragmented packets. The CVSS assessment indicates a nearby, unauthenticated attacker may trigger it without user action, potentially affecting confidentiality, integrity, and availability. The supplied evidence does not establish code execution or active exploitation.

Executive priority

Prioritize prompt remediation on ath12k-equipped endpoints operating near untrusted wireless peers. Broader emergency action is not supported because active exploitation is unconfirmed and exposure depends on driver, hardware, kernel version, and vendor backports.

Technical view

The ath12k monitor and REO reinject rings shared a ring-mask index. A REO reinject interrupt therefore also processed the unsupported monitor ring, causing invalid memory access. The fix removes the monitor-ring mask. The issue was tested on QCN9274 hardware, but the sources do not establish that exposure is limited to that device.

Likely exposure

Exposure is most likely on systems using the ath12k driver with compatible Qualcomm Wi-Fi hardware and an affected kernel. The supplied version data includes Linux 6.3, 6.6.44, 6.10.3, and 6.11, but exact affected ranges and distribution backports require vendor confirmation.

Exploitation context

The bundle marks this CVE as absent from KEV, and no supplied source reports active exploitation or a public proof of concept. CVSS 3.1 scores it 8.8 with adjacent access, low complexity, no privileges, and no user interaction. The precise malicious packet conditions are not documented here.

Researcher notes

The corrective change removes the monitor-ring mask because ath12k monitor support was not enabled. QCN9274 hw2.0 was the stated test platform, not a proven exclusivity boundary. The bundle provides no CWE, proof of concept, exploitation telemetry, or complete distribution-specific version mapping.

Mitigation direction

  • Inventory systems using the ath12k driver and compatible Qualcomm Wi-Fi hardware.
  • Apply vendor-supported kernel updates containing the applicable referenced stable fix.
  • Until patched, reduce affected Wi-Fi interface use near untrusted wireless environments.
  • Check distribution guidance because the sources do not name one universal fixed release.

Validation and detection

  • Confirm whether ath12k is loaded and compatible Qualcomm Wi-Fi hardware is present.
  • Record each running kernel build and compare it with distributor affected-version guidance.
  • Verify the updated kernel contains an applicable referenced fix or vendor backport.
  • After updating, test Wi-Fi and monitor for kernel memory faults or unexpected crashes.
Prepared
Confidence
medium
Sources
5

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2024-43847 mapping review

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Vulnerability profileCVE Program record
Severity
High
CVSS
8.8 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
3Timeline events
1ADP providers
4Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
8.8CVSS 3.1HighCVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H2.85.9Linux

Vulnerability scoring details

Base CVSS 3.1 score

8.8High
CVSS 3.1 vector shape for CVE-2024-43847Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinuxd889913205cf7ebda905b1e62c5867ed4e39f6c2, d889913205cf7ebda905b1e62c5867ed4e39f6c2, d889913205cf7ebda905b1e62c5867ed4e39f6c2unaffected
LinuxLinux6.3, 0, 6.6.44, 6.10.3, 6.11affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.