CVE-2026-64243 (GCVE-0-2026-64243)

Vulnerability from cvelistv5 – Published: 2026-07-24 15:27 – Updated: 2026-08-05 12:40
VLAI
Title
ASoC: codecs: simple-mux: Fix enum control bounds check
Summary
In the Linux kernel, the following vulnerability has been resolved: ASoC: codecs: simple-mux: Fix enum control bounds check simple_mux_control_put() rejects values greater than e->items, but enum control values are zero based. For the two-entry mux used by this driver, valid values are 0 and 1, so value 2 must be rejected as well. Accepting e->items can store an invalid mux state, pass it to the GPIO setter, and pass it on to the DAPM mux update path where it is used as an index into the enum text array. Use the same >= e->items check used by the ASoC enum helpers.
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 342fbb7578d1741ff646d7b08e14e8753267b9fa , < 6fb653b62f169f6050fac45b56bf21ad097e19f6 (git)
Affected: 342fbb7578d1741ff646d7b08e14e8753267b9fa , < d8cc3e747b002a8b965c529de79c0654675b9a1a (git)
Affected: 342fbb7578d1741ff646d7b08e14e8753267b9fa , < 5fe860af8630cf7c78523cbd68e5a234743585aa (git)
Affected: 342fbb7578d1741ff646d7b08e14e8753267b9fa , < 2ff3ac6f7664fe5639cad01712ac5e021fa7939c (git)
Affected: 342fbb7578d1741ff646d7b08e14e8753267b9fa , < 164dcbec9632ca93ae313e6da6e4e05584fa0f02 (git)
Affected: 342fbb7578d1741ff646d7b08e14e8753267b9fa , < 05ef77f02607a3dc5d7f9762cb990f76843315d4 (git)
Affected: 342fbb7578d1741ff646d7b08e14e8753267b9fa , < f63ad68e18d774a5d15cd7e405ead63f6b322679 (git)
Create a notification for this product.
Linux Linux Affected: 5.11
Unaffected: 0 , < 5.11 (semver)
Unaffected: 5.15.210 , ≤ 5.15.* (semver)
Unaffected: 6.1.176 , ≤ 6.1.* (semver)
Unaffected: 6.6.143 , ≤ 6.6.* (semver)
Unaffected: 6.12.93 , ≤ 6.12.* (semver)
Unaffected: 6.18.35 , ≤ 6.18.* (semver)
Unaffected: 7.0.12 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: codecs: simple-mux: Fix enum control bounds check\n\nsimple_mux_control_put() rejects values greater than e-\u003eitems, but\nenum control values are zero based. For the two-entry mux used by this\ndriver, valid values are 0 and 1, so value 2 must be rejected as well.\n\nAccepting e-\u003eitems can store an invalid mux state, pass it to the GPIO\nsetter, and pass it on to the DAPM mux update path where it is used as\nan index into the enum text array.\n\nUse the same \u003e= e-\u003eitems check used by the ASoC enum helpers."
        }
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            "version": "3.1"
          },
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              "value": "AV:L - An attacker reaches the flaw through SNDRV_CTL_IOCTL_ELEM_WRITE on the local ALSA control device; no network or physical-input path invokes this callback.\nAC:L - Supplying the single invalid enum value 2 directly triggers the vulnerable path on an affected non-hardened build, without a race or conditions outside the attacker\u2019s control.\nPR:L - The ioctl requires ordinary access to /dev/snd/controlC*, commonly granted to the active local user or audio group, and the kernel path performs no capability or namespace checks.\nUI:N - After obtaining control-device access, the attacker can issue the ioctl directly without any action by another user.\nS:U - The vulnerable ALSA driver and the resulting kernel impacts remain within the host kernel\u2019s security authority and do not cross a virtualization or IOMMU boundary.\nC:H - The invalid index performs an out-of-bounds pointer read and then dereferences that pointer through strcmp(); following the required conservative treatment of kernel out-of-bounds reads, confidentiality is scored High.\nI:N - There is no out-of-bounds write or attacker-controlled write primitive; value 2 is stored in-bounds and the GPIO layer normalizes it to the same Boolean state as valid value 1.\nA:H - The out-of-bounds text pointer commonly resolves to NULL or another invalid address and is dereferenced by strcmp(), causing a kernel oops and potentially a full panic on panic-on-oops systems."
            }
          ]
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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        {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64243",
    "datePublished": "2026-07-24T15:27:45.311Z",
    "dateReserved": "2026-07-19T15:36:31.772Z",
    "dateUpdated": "2026-08-05T12:40:14.935Z",
    "state": "PUBLISHED"
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For the two-entry mux used by this\\ndriver, valid values are 0 and 1, so value 2 must be rejected as well.\\n\\nAccepting e-\u003eitems can store an invalid mux state, pass it to the GPIO\\nsetter, and pass it on to the DAPM mux update path where it is used as\\nan index into the enum text array.\\n\\nUse the same \u003e= e-\u003eitems check used by the ASoC enum helpers.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"sound/soc/codecs/simple-mux.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"342fbb7578d1741ff646d7b08e14e8753267b9fa\",\"lessThan\":\"6fb653b62f169f6050fac45b56bf21ad097e19f6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"342fbb7578d1741ff646d7b08e14e8753267b9fa\",\"lessThan\":\"d8cc3e747b002a8b965c529de79c0654675b9a1a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"342fbb7578d1741ff646d7b08e14e8753267b9fa\",\"lessThan\":\"5fe860af8630cf7c78523cbd68e5a234743585aa\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"342fbb7578d1741ff646d7b08e14e8753267b9fa\",\"lessThan\":\"2ff3ac6f7664fe5639cad01712ac5e021fa7939c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"342fbb7578d1741ff646d7b08e14e8753267b9fa\",\"lessThan\":\"164dcbec9632ca93ae313e6da6e4e05584fa0f02\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"342fbb7578d1741ff646d7b08e14e8753267b9fa\",\"lessThan\":\"05ef77f02607a3dc5d7f9762cb990f76843315d4\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"342fbb7578d1741ff646d7b08e14e8753267b9fa\",\"lessThan\":\"f63ad68e18d774a5d15cd7e405ead63f6b322679\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"sound/soc/codecs/simple-mux.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.11\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.11\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.210\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.176\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.143\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.93\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.35\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.12\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H\",\"baseScore\":7.1,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.2}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/05ef77f02607a3dc5d7f9762cb990f76843315d4\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/164dcbec9632ca93ae313e6da6e4e05584fa0f02\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2ff3ac6f7664fe5639cad01712ac5e021fa7939c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/5fe860af8630cf7c78523cbd68e5a234743585aa\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/6fb653b62f169f6050fac45b56bf21ad097e19f6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d8cc3e747b002a8b965c529de79c0654675b9a1a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f63ad68e18d774a5d15cd7e405ead63f6b322679\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-05T12:17:18+00:00",
      "cve": "CVE-2026-64243",
      "id": "CVE-2026-64243",
      "initial_release_date": "2026-07-24T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ASoC: codecs: simple-mux: Fix enum control bounds check",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64243.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-07-25T00:13:48Z",
      "cve": "CVE-2026-64243",
      "id": "CVE-2026-64243",
      "initial_release_date": "2026-07-25T00:13:48Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64243",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64243.json",
      "version": "2"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.