Linux Kernel up to 5.16.18/5.17.1 venus_helper_alloc_dpb_bufs memory leak

CVSS Meta Temp Score
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CTI Interest Score
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4.4$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel up to 5.16.18/5.17.1. Affected is the function venus_helper_alloc_dpb_bufs. The manipulation leads to memory leak. This vulnerability is traded as CVE-2021-47655. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in Linux Kernel up to 5.16.18/5.17.1 and classified as problematic. This issue affects the function venus_helper_alloc_dpb_bufs. The manipulation with an unknown input leads to a memory leak vulnerability. Using CWE to declare the problem leads to CWE-401. The product does not sufficiently track and release allocated memory after it has been used, which slowly consumes remaining memory. Impacted is availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: media: venus: vdec: fixed possible memory leak issue The venus_helper_alloc_dpb_bufs() implementation allows an early return on an error path when checking the id from ida_alloc_min() which would not release the earlier buffer allocation. Move the direct kfree() from the error checking of dma_alloc_attrs() to the common fail path to ensure that allocations are released on all error paths in this function. Addresses-Coverity: 1494120 ("Resource leak")

The advisory is shared at git.kernel.org. The identification of this vulnerability is CVE-2021-47655 since 02/26/2025. Technical details are known, but no exploit is available.

Upgrading to version 5.16.19 or 5.17.2 eliminates this vulnerability. Applying the patch 5cedfe8aaf1875a5305897107b7f298db4260019/55bccafc246b2e64763a155ec454470c07a54a6e/5f89d05ba93df9c2cdfe493843f93288e55e99eb/8403fdd775858a7bf04868d43daea0acbe49ddfc is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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Version

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.5
VulDB Meta Temp Score: 4.4

VulDB Base Score: 3.5
VulDB Temp Score: 3.4
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Memory leak
CWE: CWE-401 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 5.16.19/5.17.2
Patch: 5cedfe8aaf1875a5305897107b7f298db4260019/55bccafc246b2e64763a155ec454470c07a54a6e/5f89d05ba93df9c2cdfe493843f93288e55e99eb/8403fdd775858a7bf04868d43daea0acbe49ddfc

Timelineinfo

02/26/2025 🔍
02/26/2025 +0 days 🔍
02/26/2025 +0 days 🔍
03/19/2025 +21 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2021-47655 (🔍)
GCVE (CVE): GCVE-0-2021-47655
GCVE (VulDB): GCVE-100-297329

Entryinfo

Created: 02/26/2025 11:13
Updated: 03/19/2025 04:46
Changes: 02/26/2025 11:13 (58), 03/19/2025 04:46 (12)
Complete: 🔍
Committer: sany
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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