CVE-2026-80831
crypto: mxs-dcp - fix source scatterlist length access
Description
In the Linux kernel, the following vulnerability has been resolved: crypto: mxs-dcp - fix source scatterlist length access mxs_dcp_aes_block_crypt() uses sg_dma_len() without mapping the source scatterlist with dma_map_sg() first. Therefore, sg_dma_len() is invalid and could return zero or a stale DMA length, causing encryption and decryption to process the wrong number of bytes when CONFIG_NEED_SG_DMA_LENGTH=y. Use the original scatterlist length instead.
INFO
Published Date :
Sept. 4, 2026, 4:18 p.m.
Last Modified :
Sept. 4, 2026, 4:18 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-80831
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Map the source scatterlist with dma_map_sg().
- Use the original scatterlist length for processing.
- Apply the kernel patch for mxs-dcp.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-80831.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-80831 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-2026-80831
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).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-80831 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-80831 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.
-
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Sep. 04, 2026
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: crypto: mxs-dcp - fix source scatterlist length access mxs_dcp_aes_block_crypt() uses sg_dma_len() without mapping the source scatterlist with dma_map_sg() first. Therefore, sg_dma_len() is invalid and could return zero or a stale DMA length, causing encryption and decryption to process the wrong number of bytes when CONFIG_NEED_SG_DMA_LENGTH=y. Use the original scatterlist length instead. Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/80xxx/CVE-2026-80831.json">CVE-2026-80831</a> Added Reference https://git.kernel.org/stable/c/04201dcc88b26eac52f736e39727fc5c420b7257 Added Reference https://git.kernel.org/stable/c/0e9edb108a63bbbef952dfcbc597e34ed9c1fb74 Added Reference https://git.kernel.org/stable/c/1537bd55b4f842565068c54b47cd2ae1777d5f8f Added Reference https://git.kernel.org/stable/c/182f16a20d329a1c818d51dad57d9bf43d356c7c Added Reference https://git.kernel.org/stable/c/6ef9a4afb52cb102ab038cd42352c142d8505d09 Added Reference https://git.kernel.org/stable/c/c5bcb084a9871e5b62afb5f48b60adfa13b5d9f8 Added Reference https://git.kernel.org/stable/c/da14fae5203b72ca71ccfa9af8de9249e40d533a Added Reference https://git.kernel.org/stable/c/e72a795df521cb65b7c4705cc11078cdacfaa2f4 Added Reference https://git.kernel.org/stable/c/fd0f211b27a6ec2ebd8c315683401b43adcc5511