PT-2025-18606 · Linux+2 · Linux Kernel+2
Published
2025-05-01
·
Updated
2025-07-10
·
CVE-2022-49889
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
A vulnerability in the Linux kernel's tracing subsystem has been resolved. The issue arises when the number of listed CPUs exceeds the actual number of existing CPUs. The tracing subsystem allocates a per cpu directory with access to the per CPU ring buffer via a cpuX file, but only allocates buffers for online CPUs. With the addition of waking waiters on the ring buffer when closing the file, the
ring buffer wake waiters() function must ensure that the buffer is allocated before trying to wake waiters to prevent a NULL pointer dereference.Recommendations
At the moment, there is no information about a newer version that contains a fix for this vulnerability.
Exploit
NULL Pointer Dereference
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Weakness Enumeration
Related Identifiers
Affected Products
Astra Linux
Linux Kernel
Suse