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LinuxCVE-2024-38667

HistoryJun 24, 2024 - 2:15 p.m.

CVE-2024-38667

2024-06-2414:15:12

CWE-787

Linux

web.nvd.nist.gov

linux kernel

cve-2024-38667

pt_regs corruption

riscv

secondary threads

stack corruption

cpu hotplug

v enabled

smp_callin

v context

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

AI Score

6.4

Confidence

Low

EPSS

Percentile

5.1%

JSON

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

riscv: prevent pt_regs corruption for secondary idle threads

Top of the kernel thread stack should be reserved for pt_regs. However
this is not the case for the idle threads of the secondary boot harts.
Their stacks overlap with their pt_regs, so both may get corrupted.

Similar issue has been fixed for the primary hart, see c7cdd96eca28
(“riscv: prevent stack corruption by reserving task_pt_regs(p) early”).
However that fix was not propagated to the secondary harts. The problem
has been noticed in some CPU hotplug tests with V enabled. The function
smp_callin stored several registers on stack, corrupting top of pt_regs
structure including status field. As a result, kernel attempted to save
or restore inexistent V context.

Affected configurations

Nvd

Vulners

Node

linuxlinux_kernelRange<5.7

linuxlinux_kernelRange6.1–6.1.93

linuxlinux_kernelRange6.6–6.6.33

linuxlinux_kernelRange6.9–6.9.4

linuxlinux_kernelMatch6.10.0rc1

VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel6.10.0cpe:2.3:o:linux:linux_kernel:6.10.0:rc1:*:*:*:*:*:*

Vendor	Product	Version	CPE
linux	linux_kernel	*	cpe:2.3:o:linux:linux_kernel::::::::
linux	linux_kernel	6.10.0	cpe:2.3:o:linux:linux_kernel:6.10.0:rc1::::::

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "arch/riscv/kernel/cpu_ops_sbi.c",
      "arch/riscv/kernel/cpu_ops_spinwait.c"
    ],
    "versions": [
      {
        "version": "2875fe056156",
        "lessThan": "ea22d4195cca",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "2875fe056156",
        "lessThan": "3090c06d50ea",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "2875fe056156",
        "lessThan": "0c1f28c32a19",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "2875fe056156",
        "lessThan": "a638b0461b58",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "arch/riscv/kernel/cpu_ops_sbi.c",
      "arch/riscv/kernel/cpu_ops_spinwait.c"
    ],
    "versions": [
      {
        "version": "5.7",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.7",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.93",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.33",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9.4",
        "lessThanOrEqual": "6.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]