CVE-2023-52837

2024-05-2116:15:21

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

web.nvd.nist.gov

linux kernel

fixed vulnerability

nbd_open

uaf

nbd

6.7 Medium

AI Score

Confidence

Low

0.0004 Low

EPSS

Percentile

15.8%

JSON

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

nbd: fix uaf in nbd_open

Commit 4af5f2e03013 (“nbd: use blk_mq_alloc_disk and
blk_cleanup_disk”) cleans up disk by blk_cleanup_disk() and it won’t set
disk->private_data as NULL as before. UAF may be triggered in nbd_open()
if someone tries to open nbd device right after nbd_put() since nbd has
been free in nbd_dev_remove().

Fix this by implementing ->free_disk and free private data in it.

Affected configurations

Vulners

Node

linuxlinux_kernelRange5.14–6.1.63

linuxlinux_kernelRange6.2.0–6.5.12

linuxlinux_kernelRange6.6.0–6.6.2

linuxlinux_kernelRange6.7.0≥

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/block/nbd.c"
    ],
    "versions": [
      {
        "version": "4af5f2e03013",
        "lessThan": "4e9b3ec84dc9",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "4af5f2e03013",
        "lessThan": "879947f4180b",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "4af5f2e03013",
        "lessThan": "56bd7901b5e9",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "4af5f2e03013",
        "lessThan": "327462725b0f",
        "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/block/nbd.c"
    ],
    "versions": [
      {
        "version": "5.14",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "5.14",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.63",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.5.12",
        "lessThanOrEqual": "6.5.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.2",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.7",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]