CVE-2026-89943 (GCVE-0-2026-89943)
Vulnerability from cvelistv5
Published
2026-09-16 10:32
Modified
2026-10-19 08:55
Severity ?
8.4 (High) - CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
In the Linux kernel, the following vulnerability has been resolved: ASoC: loongson: Fix error handling in ACPI property parsing In loongson_card_parse_acpi(), the return value of device_property_read_string() for the `codec-dai-name` property was ignored. If the property is missing or invalid, an uninitialized pointer would be used later, potentially leading to undefined behavior. Fix this by checking the return value and propagating the error appropriately.
References
Impacted products
Vendor Product Version
Linux Linux Version: ddb538a3004b10a04a14a0d275c5f52a8d161e80
Version: ddb538a3004b10a04a14a0d275c5f52a8d161e80
Version: ddb538a3004b10a04a14a0d275c5f52a8d161e80
Version: ddb538a3004b10a04a14a0d275c5f52a8d161e80
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "sound/soc/loongson/loongson_card.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "682c123cef455545f48ecbe74b3872fa303bf58f",
              "status": "affected",
              "version": "ddb538a3004b10a04a14a0d275c5f52a8d161e80",
              "versionType": "git"
            },
            {
              "lessThan": "4e580d84a638f007b5b68d50d7633de502f325e7",
              "status": "affected",
              "version": "ddb538a3004b10a04a14a0d275c5f52a8d161e80",
              "versionType": "git"
            },
            {
              "lessThan": "bb1602908c67db7197ab001638573262bccc6ca2",
              "status": "affected",
              "version": "ddb538a3004b10a04a14a0d275c5f52a8d161e80",
              "versionType": "git"
            },
            {
              "lessThan": "0eb0e3c623ac1da8b85d518043fef7660af7805d",
              "status": "affected",
              "version": "ddb538a3004b10a04a14a0d275c5f52a8d161e80",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "sound/soc/loongson/loongson_card.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.12"
            },
            {
              "lessThan": "6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.110",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.51",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.5",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3",
                  "versionStartIncluding": "6.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: loongson: Fix error handling in ACPI property parsing\n\nIn loongson_card_parse_acpi(), the return value of\ndevice_property_read_string() for the `codec-dai-name` property was\nignored. If the property is missing or invalid, an uninitialized pointer\nwould be used later, potentially leading to undefined behavior.\n\nFix this by checking the return value and propagating the error\nappropriately."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.4,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The bug is in loongson_card_parse_acpi(), reached only from the Loongson ASoC platform probe (loongson_asoc_card_probe) when an ACPI-companion sound-card device is enumerated. There is no network, Bluetooth, or USB packet path into this ACPI property parser.\nAC:L - If the codec-dai-name ACPI property is missing or not a string, device_property_read_string() fails without writing codec_dai_name; the ignored return then deterministically stores that uninitialized pointer into the static DAI link. No race or attacker-uncontrollable layout is required.\nPR:N - loongson_asoc_card_probe() runs automatically from ACPI/platform enumeration (PRP0001 compatible loongson,ls-audio-card) on Loongson laptops, embedded boards, and LoongArch VMs; no OS account, capability, or user-namespace privilege is checked on this probe path.\nUI:N - Probe and deferred-probe retries run unattended at boot when the matching ACPI audio-card device is present; no victim must open ALSA nodes, load a module by hand, or plug in extra hardware.\nS:U - The uninitialized DAI-name pointer is consumed inside the host ASoC core (DAI matching and logging) on the same kernel security authority; this is not a VM escape, IOMMU bypass, or sandbox breakout.\nC:H - The garbage pointer is stored as codecs-\u003edai_name and later passed to strcmp() in snd_soc_is_matching_dai() and to %s in the CODEC DAI not-registered log, producing an unbounded kernel-memory read rather than a small bounded leak.\nI:H - The same uninitialized stack pointer is written into static loongson_dai_links[] used for DAI matching; a wild-pointer match binds the wrong codec DAI (type confusion) and later ASoC bring-up operates through that component, an exploitable integrity primitive consistent with uninitialized-pointer scoring.\nA:H - strcmp() or printk %s on the uninitialized pointer oopses or panics the kernel during sound-card probe on affected Loongson ACPI systems, fully denying availability."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-19T08:55:17.585Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/682c123cef455545f48ecbe74b3872fa303bf58f"
        },
        {
          "url": "https://git.kernel.org/stable/c/4e580d84a638f007b5b68d50d7633de502f325e7"
        },
        {
          "url": "https://git.kernel.org/stable/c/bb1602908c67db7197ab001638573262bccc6ca2"
        },
        {
          "url": "https://git.kernel.org/stable/c/0eb0e3c623ac1da8b85d518043fef7660af7805d"
        }
      ],
      "title": "ASoC: loongson: Fix error handling in ACPI property parsing",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89943",
    "datePublished": "2026-09-16T10:32:30.527Z",
    "dateReserved": "2026-09-11T19:38:34.777Z",
    "dateUpdated": "2026-10-19T08:55:17.585Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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