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🛡️ CVE-2024-50139 — kernel

🟠 CVSS 7.9 — High ✅ No Known Exploit NVD
7.9
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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

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

el0_svc+0x3c/0x158

el0t_64_sync_handler+0x120/0x130

el0t_64_sync+0x194/0x198

How this vulnerability can be exploited

This issue can be reached with local access to the system, attack complexity is low, an attacker needs low-level privileges on the target. No user interaction is required. The scope is changed, meaning a successful attack can affect components beyond the vulnerable one. Rated impact: confidentiality low, integrity low, availability high.

CVSS metrics in full

The score comes from this vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H

  • Attack vector: Local — a local account, shell or session on the host is needed.
  • Attack complexity: Low — the attack works reliably, with no preparation.
  • Privileges required: Low — an ordinary user account is enough.
  • User interaction: None — nobody has to be tricked into anything.
  • Scope: Changed — a successful attack reaches components beyond the vulnerable one.
  • Confidentiality impact: Low — limited, and the attacker does not choose what is affected.
  • Integrity impact: Low — limited, and the attacker does not choose what is affected.
  • Availability impact: High — total loss, or loss the attacker controls.

Affected software

CVE-2024-50139 is recorded against 2 packages.

  • kernel (from 6.7.0 up to 6.11.6)
  • linux-kernel

Timeline and source

Published on 7 November 2024 and last revised on 12 August 2026. No public exploit is currently recorded for this entry. A vendor advisory or fix has been published. Record sourced from NVD.

References

git.kernel.org (Web)
git.kernel.org (Web)
git.kernel.org (Web)
github.com (Advisory)
nvd.nist.gov (Advisory)
git.kernel.org (Package)

Other advisories for this package

kernel has other advisories on record. If you are patching this one, these are worth checking on the same host:

CVE-2024-50139 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity High
CVSS Score 7.9
CVSS Vector CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:H
CWE N/A
Public Exploit ✅ No
Source NVD
Published 2024-11-07
Updated 2026-08-20
Modified 2026-08-12

Affected Packages

Software From version Fixed in
kernel 6.7.0 6.11.6
linux-kernel — —

Similar Threats

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ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.

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