CVE-2026-89896
media: cedrus: fix memory leak in cedrus_init_ctrls()
Description
In the Linux kernel, the following vulnerability has been resolved: media: cedrus: fix memory leak in cedrus_init_ctrls() In cedrus_init_ctrls(), the V4L2 control handler is initialized before allocating memory for ctx->ctrls. If this allocation fails, the function returns -ENOMEM without freeing the previously allocated handler resources, leading to a memory leak. Fix this by calling v4l2_ctrl_handler_free() on the ctx->ctrls allocation failure path. The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in v7.1.1. An x86_64 allyesconfig build showed no new warnings. As we do not have an Allwinner SoC or board with a Cedrus VPU available to test with, no runtime testing was able to be performed.
INFO
Published Date :
Sept. 16, 2026, 11:16 a.m.
Last Modified :
Sept. 16, 2026, 11:16 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
- Call v4l2_ctrl_handler_free() on allocation failure.
- Update the Linux kernel to a patched version.
- Apply the provided patch to the cedrus driver.
References to Advisories, Solutions, and Tools
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CVE-2026-89896.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-89896 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-89896
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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CVE-2026-89896 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-89896 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 16, 2026
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: media: cedrus: fix memory leak in cedrus_init_ctrls() In cedrus_init_ctrls(), the V4L2 control handler is initialized before allocating memory for ctx->ctrls. If this allocation fails, the function returns -ENOMEM without freeing the previously allocated handler resources, leading to a memory leak. Fix this by calling v4l2_ctrl_handler_free() on the ctx->ctrls allocation failure path. The bug was first flagged by an experimental analysis tool we are developing for kernel memory-management bugs while analyzing v6.13-rc1. The tool is still under development and is not yet publicly available. Manual inspection confirms that the bug is still present in v7.1.1. An x86_64 allyesconfig build showed no new warnings. As we do not have an Allwinner SoC or board with a Cedrus VPU available to test with, no runtime testing was able to be performed. Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/89xxx/CVE-2026-89896.json">CVE-2026-89896</a> Added Reference https://git.kernel.org/stable/c/22441be29ec27c693f40c1ef499093275ef529d1 Added Reference https://git.kernel.org/stable/c/6fabacc3b79a528450aef4c32464da2ec681049e Added Reference https://git.kernel.org/stable/c/729a1ffab968b3c493f61d1cd683f5bafec500ea Added Reference https://git.kernel.org/stable/c/79fd0b0161506fc9507bf7a6fe4c975a857a5be8 Added Reference https://git.kernel.org/stable/c/81aa608ac3a56cdd4aab0bd12442ed529a24ba31 Added Reference https://git.kernel.org/stable/c/9df2fbe563194da1967a5db083442186c1323efe Added Reference https://git.kernel.org/stable/c/ce5693b6e3a693fcdc3800af309363f6250104c8 Added Reference https://git.kernel.org/stable/c/f78cf36cabf911da348ea80e4e9f430d74f6905c