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416baaa9-dc9f-4396-8d5f-8c081fb06d67CVE-2021-46905

HistoryFeb 26, 2024 - 4:27 p.m.

CVE-2021-46905

2024-02-2616:27:45

CWE-476

416baaa9-dc9f-4396-8d5f-8c081fb06d67

web.nvd.nist.gov

1115

linux kernel

net

hso

vulnerability

fix

null-deref

cve-2021-46905

nvd

5.5 Medium

CVSS3

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

NONE

Integrity Impact

NONE

Availability Impact

HIGH

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

6.3 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

5.1%

JSON

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

net: hso: fix NULL-deref on disconnect regression

Commit 8a12f8836145 (“net: hso: fix null-ptr-deref during tty device
unregistration”) fixed the racy minor allocation reported by syzbot, but
introduced an unconditional NULL-pointer dereference on every disconnect
instead.

Specifically, the serial device table must no longer be accessed after
the minor has been released by hso_serial_tty_unregister().

Affected configurations

Vulners

NVD

Node

linuxlinux_kernelRange5.12–4.19.189

linuxlinux_kernelRange4.20.0–5.4.115

linuxlinux_kernelRange5.5.0–5.10.33

linuxlinux_kernelRange5.11.0–5.11.17

linuxlinux_kernelRange5.12.0–5.12.1

linuxlinux_kernelRange5.13.0≥

VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

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

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/usb/hso.c"
    ],
    "versions": [
      {
        "version": "a462067d7c8e",
        "lessThan": "5871761c5f0f",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "145c89c441d2",
        "lessThan": "0c71d4c89559",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "caf5ac93b3b5",
        "lessThan": "24b699bea755",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "92028d7a31e5",
        "lessThan": "5c17cfe155d2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "4a2933c88399",
        "lessThan": "d7fad2ce15bd",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "dc195928d7e4",
        "lessThan": "90642ee9eb58",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "388d05f70f1e",
        "lessThan": "0f000005da31",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8a12f8836145",
        "lessThan": "41c44e1f3112",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "8a12f8836145",
        "lessThan": "2ad5692db728",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/net/usb/hso.c"
    ],
    "versions": [
      {
        "version": "5.12",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.12",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.189",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.115",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.33",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.11.17",
        "lessThanOrEqual": "5.11.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.12.1",
        "lessThanOrEqual": "5.12.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.13",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]