5.5

CVE-2021-47276

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.

Verknüpft mit AI von unstrukturierten Daten zu bestehenden CPE der NVD
This information is available to logged-in users.
Data is provided by the National Vulnerability Database (NVD)
LinuxLinux Kernel Version >= 2.6.28 < 4.4.273
LinuxLinux Kernel Version >= 4.5 < 4.9.273
LinuxLinux Kernel Version >= 4.10 < 4.14.237
LinuxLinux Kernel Version >= 4.15 < 4.19.195
LinuxLinux Kernel Version >= 4.20 < 5.4.126
LinuxLinux Kernel Version >= 5.5 < 5.10.44
LinuxLinux Kernel Version >= 5.11 < 5.12.11
LinuxLinux Kernel Version5.13 Updaterc1
LinuxLinux Kernel Version5.13 Updaterc2
LinuxLinux Kernel Version5.13 Updaterc3
LinuxLinux Kernel Version5.13 Updaterc4
LinuxLinux Kernel Version5.13 Updaterc5
Zu dieser CVE wurde keine CISA KEV oder CERT.AT-Warnung gefunden.
EPSS Metriken
Type Source Score Percentile
EPSS FIRST.org 0.01% 0.005
CVSS Metriken
Source Base Score Exploit Score Impact Score Vector string
nvd@nist.gov 5.5 1.8 3.6
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE-706 Use of Incorrectly-Resolved Name or Reference

The product uses a name or reference to access a resource, but the name/reference resolves to a resource that is outside of the intended control sphere.