CVE-2024-43873

2024-08-2101:15:11

CWE-909

Linux

web.nvd.nist.gov

linux kernel

vhost

vsock

initialization

vulnerability

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:

vhost/vsock: always initialize seqpacket_allow

There are two issues around seqpacket_allow:

seqpacket_allow is not initialized when socket is
created. Thus if features are never set, it will be
read uninitialized.
if VIRTIO_VSOCK_F_SEQPACKET is set and then cleared,
then seqpacket_allow will not be cleared appropriately
(existing apps I know about don’t usually do this but
it’s legal and there’s no way to be sure no one relies
on this).

To fix:
- initialize seqpacket_allow after allocation
- set it unconditionally in set_features

Affected configurations

Nvd

Vulners

Node

linuxlinux_kernelRange5.14–5.15.165

linuxlinux_kernelRange5.16–6.1.103

linuxlinux_kernelRange6.2–6.6.44

linuxlinux_kernelRange6.7–6.10.3

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

Vendor	Product	Version	CPE
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/vhost/vsock.c"
    ],
    "versions": [
      {
        "version": "ced7b713711f",
        "lessThan": "ea558f10fb05",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ced7b713711f",
        "lessThan": "3062cb100787",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ced7b713711f",
        "lessThan": "30bd45936694",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ced7b713711f",
        "lessThan": "eab96e8716cb",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "ced7b713711f",
        "lessThan": "1e1fdcbdde3b",
        "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/vhost/vsock.c"
    ],
    "versions": [
      {
        "version": "5.14",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.14",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.165",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.103",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.44",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10.3",
        "lessThanOrEqual": "6.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.11",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]