CVE-2025-39890

/// Technical description

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_pr

/// Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

/// References