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CVE-2022-48714

7.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: bpf: Use VM_MAP instead of VM_ALLOC for ringbuf After commit 2fd3fb0be1d1 ("kasan, vmalloc: unpoison VM_ALLOC pages after mappi…

Published Jun 20, 2024CWE-125EPSS 0.24%

Overview

CVE-2022-48714 is a high-severity vulnerability. It was published on June 20, 2024 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

bpf: Use VM_MAP instead of VM_ALLOC for ringbuf

After commit 2fd3fb0be1d1 ("kasan, vmalloc: unpoison VM_ALLOC pages

after mapping"), non-VM_ALLOC mappings will be marked as accessible

in __get_vm_area_node() when KASAN is enabled. But now the flag for

ringbuf area is VM_ALLOC, so KASAN will complain out-of-bound access

after vmap() returns. Because the ringbuf area is created by mapping

allocated pages, so use VM_MAP instead.

After the change, info in /proc/vmallocinfo also changes from

[start]-[end] 24576 ringbuf_map_alloc+0x171/0x290 vmalloc user

to

[start]-[end] 24576 ringbuf_map_alloc+0x171/0x290 vmap user

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/5e457aeab52a5947619e1f18047f4d2f3212b3ebRefgit.kernel.org/stable/c/6304a613a97d6dcd49b93fbad31e9f39d1e138d6Refgit.kernel.org/stable/c/b293dcc473d22a62dc6d78de2b15e4f49515db56Refgit.kernel.org/stable/c/d578933f6226d5419af9306746efa1c693cbaf9cRefgit.kernel.org/stable/c/5e457aeab52a5947619e1f18047f4d2f3212b3ebRefgit.kernel.org/stable/c/6304a613a97d6dcd49b93fbad31e9f39d1e138d6Refgit.kernel.org/stable/c/b293dcc473d22a62dc6d78de2b15e4f49515db56Refgit.kernel.org/stable/c/d578933f6226d5419af9306746efa1c693cbaf9c

How CyberStrike helps

Frequently asked questions

What is CVE-2022-48714?

CVE-2022-48714 is a high-severity vulnerability. It was published on June 20, 2024 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2022-48714?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2022-48714?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2022-48714?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-48714 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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