PT-2024-11489 · Linux+5 · Linux Kernel+5
Julian Wiedmann
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Published
2021-11-26
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Updated
2024-08-30
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CVE-2021-47556
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel (affected versions not specified)
Description
The issue is related to a potential NULL pointer dereference in the
ethtool set coalesce() function. This function uses both the .get coalesce() and .set coalesce() callbacks, but the check for their availability is buggy. As a result, changing the coalesce settings on a device where the driver provides only one of the callbacks can lead to a NULL pointer dereference instead of an error. The condition has been fixed to ensure the availability of both callbacks, which also matches the netlink code. This issue only affects the legacy ioctl path and requires a specific combination of driver options.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
DoS
NULL Pointer Dereference
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Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Centos
Linux Kernel
Red Hat
Red Os
Suse