CVE-2021-47207 ALSA: gus: fix null pointer dereference on pointer block

2024-04-1018:56:39

Linux

github.com

linux kernel

alsa

vulnerability fix

null pointer dereference

AI Score

6.7

Confidence

Low

EPSS

Percentile

13.0%

SSVC

Exploitation

none

Automatable

Technical Impact

partial

JSON

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

ALSA: gus: fix null pointer dereference on pointer block

The pointer block return from snd_gf1_dma_next_block could be
null, so there is a potential null pointer dereference issue.
Fix this by adding a null check before dereference.

CNA Affected

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        "version": "1da177e4c3f4",
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    ],
    "programFiles": [
      "sound/isa/gus/gus_dma.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
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        "status": "unaffected",
        "version": "4.4.293",
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        "lessThanOrEqual": "4.4.*"
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      {
        "status": "unaffected",
        "version": "4.9.291",
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        "lessThanOrEqual": "4.9.*"
      },
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        "status": "unaffected",
        "version": "4.14.256",
        "versionType": "custom",
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        "status": "unaffected",
        "version": "4.19.218",
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        "status": "unaffected",
        "version": "5.4.162",
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        "version": "5.16",
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        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "sound/isa/gus/gus_dma.c"
    ],
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]