CVE-2025-38131

In the Linux kernel, the following vulnerability has been resolved: coresight: prevent deactivate active config while enabling the config While enable active config via cscfg_csdev_enable_active_config(), active config could be deactivated via configfs' sysfs interface. This could make UAF issue in below scenario: CPU0 CPU1 (sysfs enable) load module cscfg_load_config_sets() activate config. // sysfs (sys_active_cnt == 1) ... cscfg_csdev_enable_active_config() lock(csdev->cscfg_csdev_lock) // here load config activate by CPU1 unlock(csdev->cscfg_csdev_lock) deactivate config // sysfs (sys_activec_cnt == 0) cscfg_unload_config_sets() unload module // access to config_desc which freed // while unloading module. cscfg_csdev_enable_config To address this, use cscfg_config_desc's active_cnt as a reference count which will be holded when - activate the config. - enable the activated config. and put the module reference when config_active_cnt == 0.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/31028812724cef7bd57a51525ce58a32a6d73b22	Patch
https://git.kernel.org/stable/c/408c97c4a5e0b634dcd15bf8b8808b382e888164	Patch
https://git.kernel.org/stable/c/b3b4efa2e623aecaebd7c9b9e4171f5c659e9724	Patch
https://git.kernel.org/stable/c/dfe8224c9c7a43d356eb9f74b06868aa05f90223	Patch
https://git.kernel.org/stable/c/ed42ee1ed05ff2f4c36938379057413a40c56680	Patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html	Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::

Configuration 2 (hide)

cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*

History

No history.

Information

Published : 2025-07-03 09:15

Updated : 2025-12-17 18:12

NVD link : CVE-2025-38131

Mitre link : CVE-2025-38131

CVE.ORG link : CVE-2025-38131

JSON object : View

Products Affected

debian

debian_linux

linux

linux_kernel

CWE

CWE-416

Use After Free

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Al habilitar la configuraci\u00f3n activa mediante cscfg_csdev_enable_active_config(), esta podr\u00eda desactivarse mediante la interfaz sysfs de configfs. Esto podr\u00eda generar un problema de UAF en el siguiente escenario: CPU0 CPU1 (habilitaci\u00f3n sysfs) carga el m\u00f3dulo cscfg_load_config_sets() activa la configuraci\u00f3n. // sysfs (sys_active_cnt == 1) ... cscfg_csdev_enable_active_config() lock(csdev->cscfg_csdev_lock) // aqu\u00ed carga la configuraci\u00f3n activada por CPU1 unlock(csdev->cscfg_csdev_lock) desactiva la configuraci\u00f3n // sysfs (sys_activec_cnt == 0) cscfg_unload_config_sets() descarga el m\u00f3dulo // acceso a config_desc que se liber\u00f3 // mientras se descargaba el m\u00f3dulo. cscfg_csdev_enable_config Para solucionar esto, utilice active_cnt de cscfg_config_desc como un recuento de referencia que se mantendr\u00e1 cuando: - active la configuraci\u00f3n. - habilite la configuraci\u00f3n activada y coloque la referencia del m\u00f3dulo cuando config_active_cnt == 0."}], "lastModified": "2025-12-17T18:12:21.080", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "CBF67A42-F9C5-4A10-87CD-CC5CC75E6BF5", "versionEndExcluding": "6.1.142", "versionStartIncluding": "5.15"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "304E3F01-7D7A-4908-994E-7F95C5C00B06", "versionEndExcluding": "6.6.94", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "4FFA54AA-CDFE-4591-BD07-72813D0948F4", "versionEndExcluding": "6.12.34", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "0541C761-BD5E-4C1A-8432-83B375D7EB92", "versionEndExcluding": "6.15.3", "versionStartIncluding": "6.13"}], "operator": "OR"}]}, {"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FA6FEEC2-9F11-4643-8827-749718254FED"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}