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CVE-2026-74293 (GCVE-0-2026-74293)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:57 – Updated: 2026-08-17 05:45
VLAI
Title
ASoC: fsl: fsl_audmix: Validate written enum values
Summary
In the Linux kernel, the following vulnerability has been resolved: ASoC: fsl: fsl_audmix: Validate written enum values fsl_audmix_put_mix_clk_src() and fsl_audmix_put_out_src() convert the user-provided enum item with snd_soc_enum_item_to_val() before checking whether the item is within the enum's item count. The generic snd_soc_put_enum_double() helper performs that validation, but these callbacks use the converted value first: the clock-source path tests it with BIT(), and the output-source path indexes the prms transition table with it. Reject out-of-range enum items before converting them.
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: be1df61cf06efb355c90702e46b8d46f055acb4e , < 7513831b90a38d55fa089e3e1b49691e467afee6 (git)
Affected: be1df61cf06efb355c90702e46b8d46f055acb4e , < b4774a7da12b14fc37219ab4368d1907f9b5aca4 (git)
Affected: be1df61cf06efb355c90702e46b8d46f055acb4e , < 8fb4364eb494b926d009bfaf3c98f07c3aa5d9f3 (git)
Affected: be1df61cf06efb355c90702e46b8d46f055acb4e , < 0b10c6203e62d9e7337cc401568b201f9bac79ec (git)
Affected: be1df61cf06efb355c90702e46b8d46f055acb4e , < b36d6d48faa6b1bb723b8f4e527c531a1a68520e (git)
Affected: be1df61cf06efb355c90702e46b8d46f055acb4e , < 0f1510e84d7bfc3eb9538efa65c6ea0aadf1078c (git)
Affected: be1df61cf06efb355c90702e46b8d46f055acb4e , < 5b7a23c1ed04e794ef3b31e452ef5c93e1e34b4a (git)
Affected: be1df61cf06efb355c90702e46b8d46f055acb4e , < 3cd17e4e2871114d5579fa7bc8da66faf7fc1930 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.2
Unaffected: 0 , < 5.2 (semver)
Unaffected: 5.10.261 , ≤ 5.10.* (semver)
Unaffected: 5.15.212 , ≤ 5.15.* (semver)
Unaffected: 6.1.178 , ≤ 6.1.* (semver)
Unaffected: 6.6.145 , ≤ 6.6.* (semver)
Unaffected: 6.12.97 , ≤ 6.12.* (semver)
Unaffected: 6.18.40 , ≤ 6.18.* (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: fsl: fsl_audmix: Validate written enum values\n\nfsl_audmix_put_mix_clk_src() and fsl_audmix_put_out_src()\nconvert the user-provided enum item with snd_soc_enum_item_to_val()\nbefore checking whether the item is within the enum\u0027s item count.\n\nThe generic snd_soc_put_enum_double() helper performs that\nvalidation, but these callbacks use the converted value first: the\nclock-source path tests it with BIT(), and the output-source path\nindexes the prms transition table with it.\n\nReject out-of-range enum items before converting them."
        }
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            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
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              "lang": "en",
              "value": "AV:L - Exploitation requires a local SNDRV_CTL_IOCTL_ELEM_WRITE to /dev/snd/controlC* for the fsl-audmix \"Output Source\" or \"Mixing Clock Source\" mixer controls; no network, Bluetooth, or physical-input path reaches these put callbacks.\nAC:L - On default builds without CONFIG_SND_CTL_INPUT_VALIDATION, a single ioctl supplying an out-of-range enumerated.item[0] deterministically reaches the buggy snd_soc_enum_item_to_val()/prms[] indexing before snd_soc_put_enum_double() rejects the value; no race or uncontrollable state is needed.\nPR:L - snd_ctl_open() and snd_ctl_elem_write() perform no capability or namespace checks; any local user with ordinary access to the ALSA control device (common on i.MX8QM/i.MX952 automotive/embedded systems via audio-group or seat ACLs) can trigger the vulnerable callbacks.\nUI:N - The attacker issues the control write from its own process after opening the control device; no separate victim action such as mounting a filesystem or opening a file is required.\nS:U - The flaw corrupts or misreads kernel data and programs on-chip AUDMIX MMIO within the same host kernel security authority; it does not cross a VM, IOMMU, or sandbox boundary.\nC:H - Out-of-range enum indices are used to index the static prms[out_src][val] transition table and in BIT(val) before bounds checks, causing out-of-bounds reads of kernel rodata that are copied into transition state and can disclose adjacent memory contents.\nI:H - Attacker-chosen indices can select unintended prms transition cells or out-of-bounds prm data that pass fsl_audmix_state_trans() and drive snd_soc_component_update_bits() to write attacker-influenced mask/ctr values into AUDMIX hardware control registers.\nA:H - Large enum values can provoke undefined BIT() shifts, read past the prms table boundary, and program invalid AUDMIX control-register states that can kernel-fault or hang the audio subsystem; conservative scoring treats this memory-corruption class as high availability impact."
            }
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/7513831b90a38d55fa089e3e1b49691e467afee6"
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    "dateReserved": "2026-08-15T05:44:03.881Z",
    "dateUpdated": "2026-08-17T05:45:31.193Z",
    "state": "PUBLISHED"
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-19T10:01:29+00:00",
      "cve": "CVE-2026-74293",
      "id": "CVE-2026-74293",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "184",
      "product_status:known_not_affected": "90",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ASoC: fsl: fsl_audmix: Validate written enum values",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74293.json",
      "version": "3"
    }
  }
}



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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.