CVE-2026-72303 (GCVE-0-2026-72303)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:55 – Updated: 2026-08-17 05:42
VLAI
Title
ASoC: SOF: ipc4-control: Validate notification payload size
Summary
In the Linux kernel, the following vulnerability has been resolved: ASoC: SOF: ipc4-control: Validate notification payload size Validate MODULE_NOTIFICATION payload length before reading bytes/channel data in control update handling.
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: 2a28b5240f2b328495c6565d277f438dbc583d61 , < c29f5b4498894aebb2f87b1a29bb320e2f9348f9 (git)
Affected: 2a28b5240f2b328495c6565d277f438dbc583d61 , < 5bdfeccb7fbf6e000fc783cd8412732e67c1ad0c (git)
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Linux Linux Affected: 7.0
Unaffected: 0 , < 7.0 (semver)
Unaffected: 7.1.5 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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{
  "containers": {
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      "affected": [
        {
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          "product": "Linux",
          "programFiles": [
            "sound/soc/sof/ipc4-control.c"
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                  "versionStartIncluding": "7.0",
                  "vulnerable": true
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        }
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      "metrics": [
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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",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The flaw is reached when the on-chip SOF DSP delivers IPC4 MODULE_NOTIFICATION messages to the host via mailbox/IRQ; exploitation requires local access to a SOF-equipped system using the ALSA control interface, not remote network delivery.\nAC:L - A local attacker can repeatedly issue ALSA control ioctls that cause the DSP to emit control-change notifications; no race or victim state beyond attacker-driven audio IPC is needed to supply inconsistent num_elems versus event_data_size.\nPR:L - Only an unprivileged local user able to open ALSA control devices on SOF hardware (typical on Intel laptop/desktop audio stacks) is required; root or init-namespace capabilities are not needed to drive the vulnerable notification path.\nUI:N - No action by a separate victim is required; the attacker triggers DSP notifications through their own ALSA control operations and the kernel processes malformed firmware payloads automatically.\nS:U - Impact stays within the host kernel audio subsystem on the same machine; heap disclosure or control-cache corruption does not cross VM, container, or IOMMU boundaries into another security authority.\nC:H - Missing payload-length validation lets num_elems drive memcpy and chanv parsing beyond the kmalloc IPC notification buffer, causing out-of-bounds kernel heap reads that can disclose adjacent memory contents.\nI:H - Untrusted num_elems values cause kernel memory corruption by copying out-of-bounds firmware/heap bytes into control caches via memcpy and chanv updates, providing bounded but attacker-influenced kernel writes usable in further exploitation.\nA:H - Large num_elems values trigger extensive out-of-bounds accesses during IRQ-threaded IPC notification handling, which can provoke KASAN faults, unhandled page faults, kernel oops, or panic under realistic SOF workloads."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-17T05:42:35.730Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/c29f5b4498894aebb2f87b1a29bb320e2f9348f9"
        },
        {
          "url": "https://git.kernel.org/stable/c/5bdfeccb7fbf6e000fc783cd8412732e67c1ad0c"
        }
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      "title": "ASoC: SOF: ipc4-control: Validate notification payload size",
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-72303",
    "datePublished": "2026-08-15T05:55:21.667Z",
    "dateReserved": "2026-08-09T03:40:39.918Z",
    "dateUpdated": "2026-08-17T05:42:35.730Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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      "date": "2026-08-24",
      "epss": "0.00154",
      "percentile": "0.04763"
    },
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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-17T16:06:41+00:00",
      "cve": "CVE-2026-72303",
      "id": "CVE-2026-72303",
      "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: SOF: ipc4-control: Validate notification payload size",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72303.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

Author Source Type Date Other

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.