CVE-2021-47026: Software Security Vulnerability Vulnerability
HIGHCVE-2021-47026 is a HIGH (CVSS 7.8) security vulnerability vulnerability (CWE-416: Use After Free) affecting Software libraries in the Maven ecosystem. The weakness occurs when the product reuses or references memory after it has been freed. at some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.. Remediation is available in the latest vendor maintenance releases.
CVE-2021-47026 at a Glance
Security Impact
CVSS: 7.8
The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
How to Fix CVE-2021-47026
To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.
Run the following command in your project directory to verify that all resolved dependencies use the patched release:
mvn dependency:treeHow to Check if You Are Affected
To determine whether your Java application is affected by CVE-2021-47026, inspect your build dependencies using the Maven Dependency Plugin:
mvn dependency:treeAnalyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.
Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.
Technical Details
Vulnerability Mechanism & Technical Analysis
This vulnerability is classified under CWE-416: Use After Free, where the product reuses or references memory after it has been freed. at some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.
Source Advisory Statement
References
Frequently Asked Questions
What is CVE-2021-47026?
Which Software versions are affected?
What version fixes CVE-2021-47026?
What is the CVSS score of CVE-2021-47026?
What CWE is associated with CVE-2021-47026?
How can I check Maven dependencies for CVE-2021-47026?
Machine-readable OSV JSON
OSV v1.5 Schema
{
"schema_version" : "1.4.0",
"id" : "GHSA-h6m9-gq43-hhq2",
"modified" : "2025-01-09T15:31:50Z",
"published" : "2024-02-28T09:30:38Z",
"aliases" : [ "CVE-2021-47026" ],
"details" : "In the Linux kernel, the following vulnerability has been resolved:\n\nRDMA/rtrs-clt: destroy sysfs after removing session from active list\n\nA session can be removed dynamically by sysfs interface \"remove_path\" that\neventually calls rtrs_clt_remove_path_from_sysfs function. The current\nrtrs_clt_remove_path_from_sysfs first removes the sysfs interfaces and\nfrees sess->stats object. Second it removes the session from the active\nlist.\n\nTherefore some functions could access non-connected session and access the\nfreed sess->stats object even-if they check the session status before\naccessing the session.\n\nFor instance rtrs_clt_request and get_next_path_min_inflight check the\nsession status and try to send IO to the session. The session status\ncould be changed when they are trying to send IO but they could not catch\nthe change and update the statistics information in sess->stats object,\nand generate use-after-free problem.\n(see: \"RDMA/rtrs-clt: Check state of the rtrs_clt_sess before reading its\nstats\")\n\nThis patch changes the rtrs_clt_remove_path_from_sysfs to remove the\nsession from the active session list and then destroy the sysfs\ninterfaces.\n\nEach function still should check the session status because closing or\nerror recovery paths can change the status.",
"severity" : [ {
"type" : "CVSS_V3",
"score" : "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
} ],
"affected" : [ ],
"references" : [ {
"type" : "ADVISORY",
"url" : "https://nvd.nist.gov/vuln/detail/CVE-2021-47026"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/676171f9405dcaa45a33d18241c32f387dbaae39"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/7f4a8592ff29f19c5a2ca549d0973821319afaad"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/b64415c6b3476cf9fa4d0aea3807065b8403a937"
}, {
"type" : "WEB",
"url" : "https://git.kernel.org/stable/c/d3cca8067d43dfee4a3535c645b55f618708dccb"
} ],
"database_specific" : {
"cwe_ids" : [ "CWE-416" ],
"severity" : "HIGH",
"github_reviewed" : false,
"github_reviewed_at" : null,
"nvd_published_at" : "2024-02-28T09:15:39Z"
}
}