CVE-2020-36777

media: dvbdev: Fix memory leak in dvb_media_device_free()

Severity Score

5.5

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

Track

*SSVC

Descriptions

In the Linux kernel, the following vulnerability has been resolved: media: dvbdev: Fix memory leak in dvb_media_device_free() dvb_media_device_free() is leaking memory. Free `dvbdev->adapter->conn`
before setting it to NULL, as documented in include/media/media-device.h:
"The media_entity instance itself must be freed explicitly by the driver
if required."

En el kernel de Linux, se resolvió la siguiente vulnerabilidad: medios: dvbdev: corrige la pérdida de memoria en dvb_media_device_free() dvb_media_device_free() está perdiendo memoria. Libere `dvbdev->adapter->conn` antes de configurarlo en NULL, como se documenta en include/media/media-device.h: "La instancia media_entity debe ser liberada explícitamente por el controlador si es necesario".

A flaw was found in the Linux kernel. A missing memory release in the dvb_media_device_free function in the drivers/media/dvb-core/dvbdev.c file can result in a memory leak.

In the Linux kernel, the following vulnerability has been resolved: media: dvbdev: Fix memory leak in dvb_media_device_free() dvb_media_device_free() is leaking memory. Free `dvbdev->adapter->conn` before setting it to NULL, as documented in include/media/media-device.h: "The media_entity instance itself must be freed explicitly by the driver if required."

*Credits: N/A

Attack Vector

Local

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Local

Attack Complexity

Low

Authentication

Single

Confidentiality

None

Integrity

None

Availability

Complete

* Common Vulnerability Scoring System

SSVC

Decision:Track

Exploitation

None

Automatable

Tech. Impact

Partial

* Organization's Worst-case Scenario

Timeline

2024-02-26 CVE Reserved
2024-02-27 CVE Published
2024-12-19 CVE Updated
2025-03-18 EPSS Updated
---------- Exploited in Wild
---------- KEV Due Date
---------- First Exploit

CWE

CWE-401: Missing Release of Memory after Effective Lifetime

CAPEC

References (11)

URL	Tag	Source
https://git.kernel.org/stable/c/0230d60e4661d9ced6fb0b9a30f182ebdafbba7a	Vuln. Introduced

URL	Date	SRC

URL	Date	SRC
https://git.kernel.org/stable/c/06854b943e0571ccbd7ad0a529babed1a98ff275	2021-05-22
https://git.kernel.org/stable/c/32168ca1f123316848fffb85d059860adf3c409f	2021-05-22
https://git.kernel.org/stable/c/cd89f79be5d553c78202f686e8e4caa5fbe94e98	2021-05-22
https://git.kernel.org/stable/c/9185b3b1c143b8da409c19ac5a785aa18d67a81b	2021-05-11
https://git.kernel.org/stable/c/43263fd43083e412311fa764cd04a727b0c6a749	2021-05-11
https://git.kernel.org/stable/c/9ad15e214fcd73694ea51967d86055f47b802066	2021-05-12
https://git.kernel.org/stable/c/cede24d13be6c2a62be6d7ceea63c2719b0cfa82	2021-05-12
https://git.kernel.org/stable/c/bf9a40ae8d722f281a2721779595d6df1c33a0bf	2021-03-22

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2020-36777	2024-06-05
https://bugzilla.redhat.com/show_bug.cgi?id=2266746	2024-06-05

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.5 < 4.9.269 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 4.9.269"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.5 < 4.14.233 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 4.14.233"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.5 < 4.19.191 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 4.19.191"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.5 < 5.4.118 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 5.4.118"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.5 < 5.10.36 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 5.10.36"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.5 < 5.11.20 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 5.11.20"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.5 < 5.12.3 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 5.12.3"		en		Affected
Linux Search vendor "Linux"		Linux Kernel Search vendor "Linux" for product "Linux Kernel"				>= 4.5 < 5.13 Search vendor "Linux" for product "Linux Kernel" and version " >= 4.5 < 5.13"		en		Affected