CVE-2024-43873 vhost/vsock: always initialize seqpacket_allow

2024-08-2100:06:25

Linux

www.cve.org

linux kernel

vhost/vsock

seqpacket_allow

vulnerability

initialization

set_features

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

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"
      }
    ]
  }
]