CVE-2025-39890: wifi: ath12k: fix memory leak in ath12k_service_ready_ext_event
In the Linux kernel, the following vulnerability has been resolved:
wifi: ath12k: fix memory leak in ath12kservicereadyextevent
Currently, in ath12kservicereadyextevent(), svcrdyext.macphycaps 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): kmallocnoprof+0x30b/0x410 ath12kwmimacphycapsparse+0x84/0x100 [ath12k] ath12kwmitlviter+0x5e/0x140 [ath12k] ath12kwmisvcrdyextparse+0x308/0x4c0 [ath12k] ath12kwmitlviter+0x5e/0x140 [ath12k] ath12kservicereadyextevent.isra.0+0x44/0xd0 [ath12k] ath12kwmioprx+0x2eb/0xd70 [ath12k] ath12khtcrxcompletionhandler+0x1f4/0x330 [ath12k] ath12kcerecvprocesscb+0x218/0x300 [ath12k] ath12kpciceworkqueue+0x1b/0x30 [ath12k] processonework+0x219/0x680 bhworker+0x198/0x1f0 taskletaction+0x13/0x30 handlesoftirqs+0xca/0x460 irqexitrcu+0xbe/0x110 irqexitrcu+0x9/0x30
Free svcrdyext.macphycaps in the error case to fix this memory leak.
Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.4.1-00199-QCAHKSWPLSILICONZ-1
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Compensating control
In ath12k_service_ready_ext_event(), free svc_rdy_ext.mac_phy_caps in the error/failure case to prevent the memory leak.
Event History
Frequently Asked Questions
What is the severity of CVE-2025-39890?
CVE-2025-39890 is classified with moderate severity due to its potential to cause a memory leak in the Linux kernel.
How do I fix CVE-2025-39890?
To fix CVE-2025-39890, ensure that you update your Linux kernel to the latest version where the vulnerability is patched.
What systems are affected by CVE-2025-39890?
CVE-2025-39890 affects the Linux kernel, specifically versions that utilize the ath12k driver.
What impact does CVE-2025-39890 have on my system?
CVE-2025-39890 may lead to increased memory usage on systems running the affected driver, resulting in potential performance degradation.
Is CVE-2025-39890 publicly known?
Yes, CVE-2025-39890 has been publicly disclosed and is tracked under the Common Vulnerabilities and Exposures database.