CVE-2026-80880
IB/mlx5: Properly support implicit ODP rereg_mr
Description
In the Linux kernel, the following vulnerability has been resolved: IB/mlx5: Properly support implicit ODP rereg_mr Due to all the child mkeys in the implicit ODP configuration we cannot change anything in place for the parent mkey. Instead the whole thing needs to be rebuilt if any change is requested. If the user does not specify a translation then force the implicit values which will then fall through the logic into mlx5_ib_reg_user_mr() to allocate a completely new MR. Since implicit children were also touching the mr->pd, this removes another case where the access was racy.
INFO
Published Date :
Sept. 4, 2026, 5:17 p.m.
Last Modified :
Sept. 4, 2026, 5:17 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-80880
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
- Update the Linux kernel to the latest version.
- Apply the provided patch for IB/mlx5.
- Rebuild the implicit ODP configuration.
- Ensure all child mkeys are valid.
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-2026-80880.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-80880 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-2026-80880
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-2026-80880 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-80880 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. 04, 2026
Action Type Old Value New Value Added Description In the Linux kernel, the following vulnerability has been resolved: IB/mlx5: Properly support implicit ODP rereg_mr Due to all the child mkeys in the implicit ODP configuration we cannot change anything in place for the parent mkey. Instead the whole thing needs to be rebuilt if any change is requested. If the user does not specify a translation then force the implicit values which will then fall through the logic into mlx5_ib_reg_user_mr() to allocate a completely new MR. Since implicit children were also touching the mr->pd, this removes another case where the access was racy. Added Affected New affected value received. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/80xxx/CVE-2026-80880.json">CVE-2026-80880</a> Added Reference https://git.kernel.org/stable/c/5d02b9a2efd11d28d2a8feac7769686b1b871d9c Added Reference https://git.kernel.org/stable/c/94f7e50eb6b2ce7fbd9aeac1db22460d2013a3fb Added Reference https://git.kernel.org/stable/c/cbc9982c8573fb9e35040063aa78c8ebe768a1ff Added Reference https://git.kernel.org/stable/c/d4f84bfa089fe71f775d25beb29303e844494c25 Added Reference https://git.kernel.org/stable/c/eb7cb798e563b3f3b3baeb9cc6f7455764267e50 Added Reference https://git.kernel.org/stable/c/ee7a8335069150c3f1893a697ab30bbeca00d796 Added Reference https://git.kernel.org/stable/c/ee914ef54a7e707453ecb43eb30fb0a5c6dd0d69