CVE-2022-49875

bpftool: Fix NULL pointer dereference when pin {PROG, MAP, LINK} without FILE

Description

In the Linux kernel, the following vulnerability has been resolved: bpftool: Fix NULL pointer dereference when pin {PROG, MAP, LINK} without FILE When using bpftool to pin {PROG, MAP, LINK} without FILE, segmentation fault will occur. The reson is that the lack of FILE will cause strlen to trigger NULL pointer dereference. The corresponding stacktrace is shown below: do_pin do_pin_any do_pin_fd mount_bpffs_for_pin strlen(name) <- NULL pointer dereference Fix it by adding validation to the common process.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.01%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/8c80b2fca4112d724dde477aed13f7b0510a2792 patch
https://git.kernel.org/stable/c/6dcdd1b68b7f9333d48d48fc77b75e7f235f6a4a patch
https://git.kernel.org/stable/c/da5161ba94c5e9182c301dd4f09c94f715c068bd patch
https://git.kernel.org/stable/c/34de8e6e0e1f66e431abf4123934a2581cb5f133 patch

Frequently Asked Questions

What is the severity of CVE-2022-49875?
CVE-2022-49875 has been scored as a medium severity vulnerability.
How to fix CVE-2022-49875?
To fix CVE-2022-49875, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2022-49875 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-49875 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2022-49875?
CVE-2022-49875 affects Linux Linux, Linux Linux.
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