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CVE-2022-48755

5.5 · MEDIUM

In the Linux kernel, the following vulnerability has been resolved: powerpc64/bpf: Limit 'ldbrx' to processors compliant with ISA v2.06 Johan reported the below crash with test_bpf on ppc64 e5500…

Published Jun 20, 2024EPSS 0.21%

Overview

CVE-2022-48755 is a medium-severity vulnerability. It was published on June 20, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. 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:

powerpc64/bpf: Limit 'ldbrx' to processors compliant with ISA v2.06

Johan reported the below crash with test_bpf on ppc64 e5500:

test_bpf: #296 ALU_END_FROM_LE 64: 0x0123456789abcdef -> 0x67452301 jited:1

Oops: Exception in kernel mode, sig: 4 [#1]

BE PAGE_SIZE=4K SMP NR_CPUS=24 QEMU e500

Modules linked in: test_bpf(+)

CPU: 0 PID: 76 Comm: insmod Not tainted 5.14.0-03771-g98c2059e008a-dirty #1

NIP: 8000000000061c3c LR: 80000000006dea64 CTR: 8000000000061c18

REGS: c0000000032d3420 TRAP: 0700 Not tainted (5.14.0-03771-g98c2059e008a-dirty)

MSR: 0000000080089000 <EE,ME> CR: 88002822 XER: 20000000 IRQMASK: 0

<...>

NIP [8000000000061c3c] 0x8000000000061c3c

LR [80000000006dea64] .__run_one+0x104/0x17c [test_bpf]

Call Trace:

.__run_one+0x60/0x17c [test_bpf] (unreliable)

.test_bpf_init+0x6a8/0xdc8 [test_bpf]

.do_one_initcall+0x6c/0x28c

.do_init_module+0x68/0x28c

.load_module+0x246

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/129c71829d7f46423d95c19e8d87ce956d4c6e1cRefgit.kernel.org/stable/c/3bfbc00587dc883eaed383558ae512a351c2cd09Refgit.kernel.org/stable/c/3f5f766d5f7f95a69a630da3544a1a0cee1cdddfRefgit.kernel.org/stable/c/aaccfeeee1630b155e8ff0d6c449d3de1ef86e73Refgit.kernel.org/stable/c/129c71829d7f46423d95c19e8d87ce956d4c6e1cRefgit.kernel.org/stable/c/3bfbc00587dc883eaed383558ae512a351c2cd09Refgit.kernel.org/stable/c/3f5f766d5f7f95a69a630da3544a1a0cee1cdddfRefgit.kernel.org/stable/c/aaccfeeee1630b155e8ff0d6c449d3de1ef86e73

How CyberStrike helps

Frequently asked questions

What is CVE-2022-48755?

CVE-2022-48755 is a medium-severity vulnerability. It was published on June 20, 2024 and has a CVSS 3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2022-48755?

This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2022-48755?

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-2022-48755?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-48755 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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