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7.8
HIGH CVSS 3.1
CVE-2026-46053
net: rds: fix MR cleanup on copy error
Overview
Description

In the Linux kernel, the following vulnerability has been resolved: net: rds: fix MR cleanup on copy error __rds_rdma_map() hands sg/pages ownership to the transport after get_mr() succeeds. If copying the generated cookie back to user space fails after that point, the error path must not free those resources again before dropping the MR reference. Remove the duplicate unpin/free from the put_user() failure branch so that MR teardown is handled only through the existing final cleanup path.

Details
INFO

Published Date :

May 27, 2026, 2:17 p.m.

Last Modified :

June 1, 2026, 5:17 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Impact
Affected Products

The following products are affected by CVE-2026-46053 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.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 HIGH 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
Address MR cleanup errors in the Linux kernel's RDS component by removing redundant resource freeing.
  • Remove duplicate unpin/free from put_user() failure branch.
  • Ensure MR teardown is handled via the final cleanup path.
  • Apply the resolved Linux kernel patch for net: rds.
  • Update your Linux kernel to the fixed version.
References
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-2026-46053.

URL Resource
https://git.kernel.org/stable/c/033370ffb3c9c0264d19f8ba9ef769523266589a
https://git.kernel.org/stable/c/106dc689206610cfa2098f593fdd1e020c997835
https://git.kernel.org/stable/c/8141a2dc70080eda1aedc0389ed2db2b292af5bd
https://git.kernel.org/stable/c/8fdbb6262a4a3ed44a0830a7793903b54bb27bdc
https://git.kernel.org/stable/c/91a44b406bc1f9e1c5da0cb7d0d5991b43b79147
https://git.kernel.org/stable/c/b3cb8cae530b2727d8245684148bb49425f6765c
https://git.kernel.org/stable/c/d95cea9298be1ba8876e3f156be96d3a492085ca
https://git.kernel.org/stable/c/ec55a86f7fba7d9111df94b9c11a4755ed492995
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-46053 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-2026-46053 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-2026-46053 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-46053 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.

  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Jun. 01, 2026

    Action Type Old Value New Value
    Added Reference https://git.kernel.org/stable/c/106dc689206610cfa2098f593fdd1e020c997835
    Added Reference https://git.kernel.org/stable/c/91a44b406bc1f9e1c5da0cb7d0d5991b43b79147
    Added Reference https://git.kernel.org/stable/c/ec55a86f7fba7d9111df94b9c11a4755ed492995
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    May. 30, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    May. 27, 2026

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: net: rds: fix MR cleanup on copy error __rds_rdma_map() hands sg/pages ownership to the transport after get_mr() succeeds. If copying the generated cookie back to user space fails after that point, the error path must not free those resources again before dropping the MR reference. Remove the duplicate unpin/free from the put_user() failure branch so that MR teardown is handled only through the existing final cleanup path.
    Added Reference https://git.kernel.org/stable/c/033370ffb3c9c0264d19f8ba9ef769523266589a
    Added Reference https://git.kernel.org/stable/c/8141a2dc70080eda1aedc0389ed2db2b292af5bd
    Added Reference https://git.kernel.org/stable/c/8fdbb6262a4a3ed44a0830a7793903b54bb27bdc
    Added Reference https://git.kernel.org/stable/c/b3cb8cae530b2727d8245684148bb49425f6765c
    Added Reference https://git.kernel.org/stable/c/d95cea9298be1ba8876e3f156be96d3a492085ca
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 7.8
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact