Memory leak in Linux kernel - CVE-2021-47655
Published: February 26, 2025 / Updated: May 11, 2025
Vulnerability identifier: #VU104409
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-47655
CWE-ID: CWE-401
Exploitation vector: Local access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the venus_helper_alloc_dpb_bufs() function in drivers/media/platform/qcom/venus/helpers.c. A local user can perform a denial of service (DoS) attack.
Affected software
Linux kernel
How to mitigate CVE-2021-47655
Install update from vendor's website.
Linux kernel - addressed in versions 5.15.174, 5.16.19, 5.17.2, 5.18
External References
- https://git.kernel.org/stable/c/55bccafc246b2e64763a155ec454470c07a54a6e
- https://git.kernel.org/stable/c/5cedfe8aaf1875a5305897107b7f298db4260019
- https://git.kernel.org/stable/c/5f89d05ba93df9c2cdfe493843f93288e55e99eb
- https://git.kernel.org/stable/c/8403fdd775858a7bf04868d43daea0acbe49ddfc
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.15.174
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.16.19
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.17.2
- https://mirrors.edge.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.18