CVE-2025-37743

Service interruption via leaked monitor-ring allocations

Published May 1, 2025 · Updated May 11, 2026

Memory exhaustion in the ath12k driver in Linux 6.3 through 6.14.2 allows local users to interrupt service through extended statistics. The HAL_RX_MPDU_START handler allocates mon_mpdu with kzalloc for each monitor-ring TLV but never frees it in extended-statistics mode. Reachability requires ath12k on QCN9274 or WCN7850 hardware with an AP interface and extended statistics active; accumulated allocations can interrupt service.

CVSS severity5.5
Medium
EPSS probability0.15%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Memory exhaustion in the ath12k driver in Linux 6.3 through 6.14.2 allows local users to interrupt service through extended statistics. The HAL_RX_MPDU_START handler allocates mon_mpdu with kzalloc for each monitor-ring TLV but never frees it in extended-statistics mode. Reachability requires ath12k on QCN9274 or WCN7850 hardware with an AP interface and extended statistics active; accumulated allocations can interrupt service.

The record

CVE
CVE-2025-37743
Published
May 1, 2025
Updated
May 11, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-401, T1499
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. May 1, 2025CVE publishedPublication date reported by the CVE source.
  2. May 11, 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=6.3
  2. Affected versionversion=d889913205cf7ebda905b1e62c5867ed4e39f6c2 <286bab0fc7b9db728dab8c63cadf6be9b3facf8c
  3. Affected versionversion=d889913205cf7ebda905b1e62c5867ed4e39f6c2 <ecfc131389923405be8e7a6f4408fd9321e4d19b

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.3; version=d889913205cf7ebda905b1e62c5867ed4e39f6c2 <286bab0fc7b9db728dab8c63cadf6be9b3facf8c; version=d889913205cf7ebda905b1e62c5867ed4e39f6c2 <ecfc131389923405be8e7a6f4408fd9321e4d19b

Published CVSS scores

5.5Canonical UbuntuCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
5.5Amazon LinuxCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-401Missing Release of Memory after Effective Lifetime
T1499Endpoint Denial of Service

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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