---
id: CVE-2025-39890
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: ath12k: fix memory leak in ath12k_service_ready_ext_event

  Currently, in ath12k_service_ready_ext_event(), svc_rdy_ext.mac_phy_caps
  is not freed in the failure ca…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  wifi: ath12k: fix memory leak in ath12k_service_ready_ext_event

  Currently, in ath12k_service_ready_ext_event(), svc_rdy_ext.mac_phy_caps
  is not freed in the failure ca…
severity: medium
cvss: 5.5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'
cwe:
  - CWE-401
  - CWE-401
vendor: linux
product: linux_kernel
affected:
  - 'linux_kernel >= 6.3, < 6.6.94'
  - 'linux_kernel >= 6.7, < 6.12.34'
  - 'linux_kernel >= 6.13, < 6.15.3'
patched:
  - linux_kernel 6.15.3
published: '2025-09-24'
updated: '2026-09-26'
sourceUpdated: '2026-09-26T00:10:00.127'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2025-39890'
references:
  - url: 'https://git.kernel.org/stable/c/1089f65b2de78c7837ef6b4f26146a5a5b0b9749'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/3a392f874ac83a77ad0e53eb8aafdbeb787c9298'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/89142d34d5602c7447827beb181fa06eb08b9d5c'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/99dbad1b01d3b2f361a9db55c1af1212be497a3d'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
epss: 0.00145
epssPercentile: 0.03128
ingestedAt: '2026-09-26T00:22:39.951Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

wifi: ath12k: fix memory leak in ath12k_service_ready_ext_event

Currently, in ath12k_service_ready_ext_event(), svc_rdy_ext.mac_phy_caps
is not freed in the failure case, causing a memory leak. The following
trace is observed in kmemleak:

unreferenced object 0xffff8b3eb5789c00 (size 1024):
 comm "softirq", pid 0, jiffies 4294942577
 hex dump (first 32 bytes):
   00 00 00 00 01 00 00 00 00 00 00 00 7b 00 00 10  ............{...
   01 00 00 00 00 00 00 00 01 00 00 00 1f 38 00 00  .............8..
 backtrace (crc 44e1c357):
   __kmalloc_noprof+0x30b/0x410
   ath12k_wmi_mac_phy_caps_parse+0x84/0x100 [ath12k]
   ath12k_wmi_tlv_iter+0x5e/0x140 [ath12k]
   ath12k_wmi_svc_rdy_ext_parse+0x308/0x4c0 [ath12k]
   ath12k_wmi_tlv_iter+0x5e/0x140 [ath12k]
   ath12k_service_ready_ext_event.isra.0+0x44/0xd0 [ath12k]
   ath12k_wmi_op_rx+0x2eb/0xd70 [ath12k]
   ath12k_htc_rx_completion_handler+0x1f4/0x330 [ath12k]
   ath12k_ce_recv_process_cb+0x218/0x300 [ath12k]
   ath12k_pci_ce_workqueue+0x1b/0x30 [ath12k]
   process_one_work+0x219/0x680
   bh_worker+0x198/0x1f0
   tasklet_action+0x13/0x30
   handle_softirqs+0xca/0x460
   __irq_exit_rcu+0xbe/0x110
   irq_exit_rcu+0x9/0x30

Free svc_rdy_ext.mac_phy_caps in the error case to fix this memory leak.

Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPL_SILICONZ-1

## Affected

- `linux_kernel >= 6.3, < 6.6.94`
- `linux_kernel >= 6.7, < 6.12.34`
- `linux_kernel >= 6.13, < 6.15.3`

## Remediation

Upgrade past the affected range:

- `linux_kernel 6.15.3`