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CVE-2024-50139

7.9 · HIGH

In the Linux kernel, the following vulnerability has been resolved: KVM: arm64: Fix shift-out-of-bounds bug Fix a shift-out-of-bounds bug reported by UBSAN when running VM with MTE enabled host k…

Published Nov 7, 2024EPSS 0.23%

Overview

CVE-2024-50139 is a high-severity vulnerability. It was published on November 7, 2024 and has a CVSS 3.1 base score of 7.9 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.9, 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:

KVM: arm64: Fix shift-out-of-bounds bug

Fix a shift-out-of-bounds bug reported by UBSAN when running

VM with MTE enabled host kernel.

UBSAN: shift-out-of-bounds in arch/arm64/kvm/sys_regs.c:1988:14

shift exponent 33 is too large for 32-bit type 'int'

CPU: 26 UID: 0 PID: 7629 Comm: qemu-kvm Not tainted 6.12.0-rc2 #34

Hardware name: IEI NF5280R7/Mitchell MB, BIOS 00.00. 2024-10-12 09:28:54 10/14/2024

Call trace:

dump_backtrace+0xa0/0x128

show_stack+0x20/0x38

dump_stack_lvl+0x74/0x90

dump_stack+0x18/0x28

__ubsan_handle_shift_out_of_bounds+0xf8/0x1e0

reset_clidr+0x10c/0x1c8

kvm_reset_sys_regs+0x50/0x1c8

kvm_reset_vcpu+0xec/0x2b0

__kvm_vcpu_set_target+0x84/0x158

kvm_vcpu_set_target+0x138/0x168

kvm_arch_vcpu_ioctl_vcpu_init+0x40/0x2b0

kvm_arch_vcpu_ioctl+0x28c/0x4b8

kvm_vcpu_ioctl+0x4bc/0x7a8

__arm64_sys_ioctl+0xb4/0x100

invoke_syscall+0x70/0x100

el0_svc_common.constprop.0+0x48/0xf0

do_el0_svc+0x24/0x38

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.

Frequently asked questions

What is CVE-2024-50139?

CVE-2024-50139 is a high-severity vulnerability. It was published on November 7, 2024 and has a CVSS 3.1 base score of 7.9 (HIGH).

How severe is CVE-2024-50139?

This vulnerability has a CVSS 3.1 base score of 7.9, 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-2024-50139?

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-2024-50139?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2024-50139 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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