CVE-2024-27043 media: edia: dvbdev: fix a use-after-free

2024-05-0112:54:11

Linux

www.cve.org

linux kernel

use-after-free

vulnerability

dvbdev fix

media fix

7.6 High

AI Score

Confidence

High

0.0004 Low

EPSS

Percentile

13.2%

JSON

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

media: edia: dvbdev: fix a use-after-free

In dvb_register_device, *pdvbdev is set equal to dvbdev, which is freed
in several error-handling paths. However, *pdvbdev is not set to NULL
after dvbdev’s deallocation, causing use-after-frees in many places,
for example, in the following call chain:

When calling dvb_unregister_device, dmxdev->dvbdev (i.e. *pdvbdev in
dvb_register_device) could point to memory that had been freed in
dvb_register_device. Thereafter, this pointer is transferred to
kref_put and triggering a use-after-free.

CNA Affected

[
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "unaffected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "drivers/media/dvb-core/dvbdev.c"
    ],
    "versions": [
      {
        "version": "b61901024776",
        "lessThan": "d0f5c2833382",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b61901024776",
        "lessThan": "f20c3270f3ed",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b61901024776",
        "lessThan": "096237039d00",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b61901024776",
        "lessThan": "0d3fe80b6d17",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b61901024776",
        "lessThan": "437a111f79a2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b61901024776",
        "lessThan": "779e8db7efb2",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b61901024776",
        "lessThan": "35674111a043",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b61901024776",
        "lessThan": "b7586e902128",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "b61901024776",
        "lessThan": "8c64f4cdf4e6",
        "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/media/dvb-core/dvbdev.c"
    ],
    "versions": [
      {
        "version": "2.6.21",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "2.6.21",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "4.19.311",
        "lessThanOrEqual": "4.19.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.4.273",
        "lessThanOrEqual": "5.4.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.10.214",
        "lessThanOrEqual": "5.10.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "5.15.153",
        "lessThanOrEqual": "5.15.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.1.83",
        "lessThanOrEqual": "6.1.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.6.23",
        "lessThanOrEqual": "6.6.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.7.11",
        "lessThanOrEqual": "6.7.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.8.2",
        "lessThanOrEqual": "6.8.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]