CVE-2022-48770

bpf: Guard against accessing NULL pt_regs in bpf_get_task_stack()

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: Guard against accessing NULL pt_regs in bpf_get_task_stack() task_pt_regs() can return NULL on powerpc for kernel threads. This is then used in __bpf_get_stack() to check for user mode, resulting in a kernel oops. Guard against this by checking return value of task_pt_regs() before trying to obtain the call chain.

Category

5.5
CVSS
Severity: Medium
CVSS 3.1 •
EPSS 0.05%
Affected: Linux Linux
Affected: Linux Linux
Published at:
Updated at:

References

Link Tags
https://git.kernel.org/stable/c/ff6bdc205fd0a83bd365405d4e31fb5905826996 patch
https://git.kernel.org/stable/c/0bcd484587b3b3092e448d27dc369e347e1810c3 patch
https://git.kernel.org/stable/c/b82ef4985a6d05e80f604624332430351df7b79a patch
https://git.kernel.org/stable/c/b992f01e66150fc5e90be4a96f5eb8e634c8249e patch

Frequently Asked Questions

What is the severity of CVE-2022-48770?
CVE-2022-48770 has been scored as a medium severity vulnerability.
How to fix CVE-2022-48770?
To fix CVE-2022-48770, 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-2022-48770 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2022-48770 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-2022-48770?
CVE-2022-48770 affects Linux Linux, Linux Linux.
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