Linux Kernel 6.2 dvb_frontend.c dvb_frontend_get_event denial of service

Summaryinfo

A vulnerability classified as problematic has been found in Linux Kernel 6.2. Affected by this issue is the function dvb_frontend_get_event of the file drivers/media/dvb-core/dvb_frontend.c. The manipulation leads to denial of service. This vulnerability is documented as CVE-2023-31084. Additionally, an exploit exists.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Linux Kernel 6.2 (Operating System). This issue affects the function dvb_frontend_get_event of the file drivers/media/dvb-core/dvb_frontend.c. The manipulation with an unknown input leads to a denial of service vulnerability. Using CWE to declare the problem leads to CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. Impacted is availability. The summary by CVE is:

An issue was discovered in drivers/media/dvb-core/dvb_frontend.c in the Linux kernel 6.2. There is a blocking operation when a task is in !TASK_RUNNING. In dvb_frontend_get_event, wait_event_interruptible is called; the condition is dvb_frontend_test_event(fepriv,events). In dvb_frontend_test_event, down(&fepriv->sem) is called. However, wait_event_interruptible would put the process to sleep, and down(&fepriv->sem) may block the process.

The weakness was released 04/24/2023. The advisory is shared at lore.kernel.org. The identification of this vulnerability is CVE-2023-31084 since 04/24/2023. Technical details as well as a public exploit are known.

The exploit is available at gist.github.com. It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 215892 (Azure Linux 3.0 Security Update: hyperv-daemons (CVE-2023-31084)), which helps to determine the existence of the flaw in a target environment.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at Tenable (215892). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Operating System

Vendor

• Linux

Name

• Kernel

Version

• 6.2

License

• open-source

Website

• Vendor: https://www.kernel.org/

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If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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