CVE-2026-72261 (GCVE-0-2026-72261)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:54 – Updated: 2026-08-17 05:42
VLAI
Title
ASoC: SOF: ipc3-control: Validate size in snd_sof_update_control
Summary
In the Linux kernel, the following vulnerability has been resolved: ASoC: SOF: ipc3-control: Validate size in snd_sof_update_control In snd_sof_update_control(), firmware-provided cdata->num_elems is checked against local_cdata->data->size but never against the actual allocation size. If local_cdata->data->size was previously set to an inconsistent value, the memcpy could write past the allocated buffer. Add a bounds check to ensure num_elems fits within the available space in the ipc_control_data allocation before copying.
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: 10f461d79c2d1afb22344986cc1b4631169cf25e , < 1dc25a3e06364f48c4ef06016852f8b82425151a (git)
Affected: 10f461d79c2d1afb22344986cc1b4631169cf25e , < ee781058cd4d71e4449f41cbe6a3b8c59daa2c51 (git)
Affected: 10f461d79c2d1afb22344986cc1b4631169cf25e , < ecf67f1302f2080b4d241b973364aacda70ad740 (git)
Affected: 10f461d79c2d1afb22344986cc1b4631169cf25e , < d3abaedf6a58469610136d2dace1a85cddf7afcf (git)
Affected: 10f461d79c2d1afb22344986cc1b4631169cf25e , < 2a591bf6fd41fd14bdae689aafac4a9ee702c23c (git)
Affected: 10f461d79c2d1afb22344986cc1b4631169cf25e , < 390aa4c9339bb0ec0bc8d554e830faf93ca9d49e (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.18
Unaffected: 0 , < 5.18 (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)
guessed Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: SOF: ipc3-control: Validate size in snd_sof_update_control\n\nIn snd_sof_update_control(), firmware-provided cdata-\u003enum_elems is\nchecked against local_cdata-\u003edata-\u003esize but never against the actual\nallocation size. If local_cdata-\u003edata-\u003esize was previously set to an\ninconsistent value, the memcpy could write past the allocated buffer.\n\nAdd a bounds check to ensure num_elems fits within the available space\nin the ipc_control_data allocation before copying."
        }
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              "value": "AV:L - The bug is reached on local SOF/IPC3 systems when DSP firmware sends SOF_IPC_GLB_COMP_MSG notifications that flow through sof_ipc3_rx_msg() to sof_ipc3_control_update() and snd_sof_update_control(); setup uses local ALSA ioctl/TLV on /dev/snd/controlC*, not remote network input.\nAC:L - An attacker can create the inconsistent local_cdata-\u003edata-\u003esize via ALSA bytes put/get IPC to the DSP and then reliably provoke matching firmware control notifications by driving audio activity; no uncontrollable memory layout or victim timing is required.\nPR:L - Reaching SOF binary kcontrols requires only local ALSA access to sound control devices, which is typically granted to unprivileged users in the audio group without init-namespace root or CAP_SYS_ADMIN; user namespaces do not grant this hardware path.\nUI:N - No separate victim action is needed; exploitation uses the attacker\u0027s own local ALSA clients and audio sessions to reach the vulnerable IPC3 control-update path on affected SOF hardware.\nS:U - Impact is kernel heap corruption and privilege escalation within the host kernel security domain; it does not cross VM, container, or IOMMU boundaries into another authority.\nC:H - The unchecked memcpy can write past the ipc_control_data kzalloc buffer, corrupting adjacent kernel heap objects and enabling information disclosure or further memory corruption primitives beyond the intended control cache.\nI:H - This is an out-of-bounds kernel heap write that can overwrite adjacent structures and be leveraged for control-flow hijack or local privilege escalation, not merely limited or benign data modification.\nA:H - Writing beyond the allocated ipc_control_data buffer can corrupt critical kernel heap metadata or objects and cause kernel oops/panic or system instability, satisfying high availability impact for kernel crashes."
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    "datePublished": "2026-08-15T05:54:49.022Z",
    "dateReserved": "2026-08-09T03:40:39.915Z",
    "dateUpdated": "2026-08-17T05:42:10.529Z",
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          }
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        "lastModified": "2026-08-17T06:18:28.470",
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      "cve": "CVE-2026-72261",
      "id": "CVE-2026-72261",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_affected": "232",
      "product_status:known_not_affected": "42",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: ASoC: SOF: ipc3-control: Validate size in snd_sof_update_control",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72261.json",
      "version": "3"
    },
    "suse_vex": {
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      "current_release_date": "2026-08-31T16:26:05Z",
      "cve": "CVE-2026-72261",
      "id": "CVE-2026-72261",
      "initial_release_date": "2026-08-31T16:26:05Z",
      "product_status:known_affected": "82",
      "product_status:known_not_affected": "280",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-72261",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-72261.json",
      "version": "2"
    }
  }
}



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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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