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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2021-47276 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: ftrace: Do not blindly read the ip address in ftrace_bug() It was reported that a bug on arm64 caused a bad ip address to be used for updating into a nop in ftrace_init(), but the error path (rightfully) returned -EINVAL and not -EFAULT, as the bug caused more than one error to occur. But because -EINVAL was returned, the ftrace_bug() tried to report what was at the location of the ip address, and read it directly. This caused the machine to panic, as the ip was not pointing to a valid memory address. Instead, read the ip address with copy_from_kernel_nofault() to safely access the memory, and if it faults, report that the address faulted, otherwise report what was in that location.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/0bc62e398bbd9e600959e610def5109957437b28 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/3e4ddeb68751fb4fb657199aed9cfd5d02796875 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/4aedc2bc2b32c93555f47c95610efb89cc1ec09b CVE, kernel.org Patch 
https://git.kernel.org/stable/c/6c14133d2d3f768e0a35128faac8aa6ed4815051 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/7e4e824b109f1d41ccf223fbb0565d877d6223a2 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/862dcc14f2803c556bdd73b43c27b023fafce2fb CVE, kernel.org Patch 
https://git.kernel.org/stable/c/97524384762c1fb9b3ded931498dd2047bd0de81 CVE, kernel.org Patch 
https://git.kernel.org/stable/c/acf671ba79c1feccc3ec7cfdcffead4efcec49e7 CVE, kernel.org Patch 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-706 Use of Incorrectly-Resolved Name or Reference cwe source acceptance level NIST  

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Change History

4 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2021-47276
NVD Published Date:
05/21/2024
NVD Last Modified:
04/30/2025
Source:
kernel.org