{
  "schema_version": "1.6.1",
  "id": "RPI-CVE-2026-93039",
  "modified": "2026-10-07T17:22:01Z",
  "upstream": [
    "CVE-2026-93039"
  ],
  "published": "2026-09-17T16:10:40Z",
  "summary": "ASoC: meson: Keep link pointers valid on realloc failure",
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: meson: Keep link pointers valid on realloc failure\n\nmeson_card_reallocate_links() grows the DAI link and private data\narrays with two consecutive krealloc() calls and updates the owner\npointers only after both calls have succeeded.\n\nA successful krealloc() may move the data: it frees the old block and\nreturns a new one. When that happens for the link array and the second\nkrealloc() then fails, card->dai_link still points to the block that\nkrealloc() already freed, and the error path frees the new block too.\nThe probe error path then calls meson_card_clean_references(), which\ndereferences card->dai_link and kfree()s it again, resulting in a\nuse-after-free and a double free.\n\nCommit card->dai_link and card->num_links right after the first\nkrealloc() succeeds, so the pointer always refers to a valid allocation\nthat meson_card_clean_references() can walk and free. krealloc() with\n__GFP_ZERO zero-initializes the added entries, so walking them on the\nerror path is safe. With both failure paths reduced to a plain return,\ndrop the goto labels and the error message.",
  "affected": [
    {
      "package": {
        "ecosystem": "Raspberry Pi OS:12",
        "name": "linux"
      },
      "versions": [
        "1:6.1.47-1+rpt4"
      ],
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-2712",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v6",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v7l",
            "binary_version": "1:6.1.47-1+rpt4"
          },
          {
            "binary_name": "linux-image-6.1.0-rpi3-rpi-v8",
            "binary_version": "1:6.1.47-1+rpt4"
          }
        ]
      },
      "database_specific": {
        "per_version": {
          "1:6.1.47-1+rpt4": {
            "linux_commit": "655fc658a15ae7a6f37103754adb39ba52a9a14e",
            "upstream_version": "6.1.47",
            "assessment": "commit ancestry (strak rule)",
            "upstream_fixed": "6.1.188",
            "compiled_filter": false
          }
        }
      }
    }
  ],
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-93039"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/de33afc57f24538186bccf4c4f6c65dd38634fd8"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/1c1485343b7c1c39dab7ecb9cd16ba49fd0ce642"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8db0a0fc84e80aa9924e0833aef6cc95df94e5a7"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/41e92e0caa1fe3df2efaca346bfcaeb7fb9826ab"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/0b30fbe6bf7cf6499b19dd886f466e7c9e820089"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/8fec16898f184e5f8f8fdd09ff1ced2bd7ffc13d"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/5ed1b048527bebe4529eb6e01c34dcc5d97ba5fe"
    },
    {
      "type": "FIX",
      "url": "https://git.kernel.org/stable/c/2aaa41cf974f83a6fb105422bac4e2f107150774"
    }
  ],
  "database_specific": {
    "source": "https://git.kernel.org/pub/scm/linux/security/vulns.git",
    "upstream_modified": "2026-09-18T17:55:42Z"
  }
}