CVE-2024-42088

2024-07-2917:15:11

Linux

web.nvd.nist.gov

linux kernel

asoc

vulnerability

AI Score

6.7

Confidence

Low

EPSS

Percentile

9.4%

JSON

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

ASoC: mediatek: mt8195: Add platform entry for ETDM1_OUT_BE dai link

Commit e70b8dd26711 (“ASoC: mediatek: mt8195: Remove afe-dai component
and rework codec link”) removed the codec entry for the ETDM1_OUT_BE
dai link entirely instead of replacing it with COMP_EMPTY(). This worked
by accident as the remaining COMP_EMPTY() platform entry became the codec
entry, and the platform entry became completely empty, effectively the
same as COMP_DUMMY() since snd_soc_fill_dummy_dai() doesn’t do anything
for platform entries.

This causes a KASAN out-of-bounds warning in mtk_soundcard_common_probe()
in sound/soc/mediatek/common/mtk-soundcard-driver.c:

for_each_card_prelinks(card, i, dai_link) {
	if (adsp_node && !strncmp(dai_link-&gt;name, "AFE_SOF", strlen("AFE_SOF")))
		dai_link-&gt;platforms-&gt;of_node = adsp_node;
	else if (!dai_link-&gt;platforms-&gt;name && !dai_link-&gt;platforms-&gt;of_node)
		dai_link-&gt;platforms-&gt;of_node = platform_node;
}

where the code expects the platforms array to have space for at least one entry.

Add an COMP_EMPTY() entry so that dai_link->platforms has space.

Affected configurations

Vulners

Node

linuxlinux_kernelRange6.8–6.9.8

linuxlinux_kernelRange6.10.0≥

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": [
      "sound/soc/mediatek/mt8195/mt8195-mt6359.c"
    ],
    "versions": [
      {
        "version": "e70b8dd26711",
        "lessThan": "42b9ab7a4d7e",
        "status": "affected",
        "versionType": "git"
      },
      {
        "version": "e70b8dd26711",
        "lessThan": "282a4482e198",
        "status": "affected",
        "versionType": "git"
      }
    ]
  },
  {
    "product": "Linux",
    "vendor": "Linux",
    "defaultStatus": "affected",
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "programFiles": [
      "sound/soc/mediatek/mt8195/mt8195-mt6359.c"
    ],
    "versions": [
      {
        "version": "6.8",
        "status": "affected"
      },
      {
        "version": "0",
        "lessThan": "6.8",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.9.8",
        "lessThanOrEqual": "6.9.*",
        "status": "unaffected",
        "versionType": "custom"
      },
      {
        "version": "6.10",
        "lessThanOrEqual": "*",
        "status": "unaffected",
        "versionType": "original_commit_for_fix"
      }
    ]
  }
]