Vulnerability-Lookup

GHSA-2HHX-3VXC-CW6X

Vulnerability from github – Published: 2026-08-15 06:32 – Updated: 2026-08-23 15:33

Details

In the Linux kernel, the following vulnerability has been resolved:

ASoC: SOF: ipc3-control: Fix heap overflow in bytes_ext put/get

The ipc_control_data buffer is allocated as kzalloc(max_size), where max_size covers the entire struct sof_ipc_ctrl_data including its flexible array payload. However, the bounds checks in bytes_ext_put and _bytes_ext_get compared user data lengths against max_size directly, ignoring that cdata->data sits at an offset of sizeof(struct sof_ipc_ctrl_data) bytes into the allocation.

This allowed writing up to sizeof(struct sof_ipc_ctrl_data) bytes past the end of the heap buffer from unprivileged userspace via the ALSA TLV kcontrol interface, and similarly allowed over-reading adjacent heap data on the get path.

Fix all bounds checks to subtract sizeof(*cdata) from max_size so they reflect the actual space available at the cdata->data offset. Also fix the error-path restore in bytes_ext_put which wrote to cdata->data instead of cdata, causing the same overflow.

Severity

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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{
  "affected": [],
  "aliases": [
    "CVE-2026-72262"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-15T06:21:54Z",
    "severity": "HIGH"
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nASoC: SOF: ipc3-control: Fix heap overflow in bytes_ext put/get\n\nThe ipc_control_data buffer is allocated as kzalloc(max_size), where\nmax_size covers the entire struct sof_ipc_ctrl_data including its\nflexible array payload. However, the bounds checks in bytes_ext_put\nand _bytes_ext_get compared user data lengths against max_size\ndirectly, ignoring that cdata-\u003edata sits at an offset of\nsizeof(struct sof_ipc_ctrl_data) bytes into the allocation.\n\nThis allowed writing up to sizeof(struct sof_ipc_ctrl_data) bytes past\nthe end of the heap buffer from unprivileged userspace via the ALSA TLV\nkcontrol interface, and similarly allowed over-reading adjacent heap\ndata on the get path.\n\nFix all bounds checks to subtract sizeof(*cdata) from max_size so they\nreflect the actual space available at the cdata-\u003edata offset. Also fix\nthe error-path restore in bytes_ext_put which wrote to cdata-\u003edata\ninstead of cdata, causing the same overflow.",
  "id": "GHSA-2hhx-3vxc-cw6x",
  "modified": "2026-08-23T15:33:01Z",
  "published": "2026-08-15T06:32:17Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72262"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/121577383b5cf221e86581e0f2bcca4c66f17469"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/1adde1941bba7b0d7104b86ed819d48d81cb0ad9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/af4b437a463ac0482ba705434a44da06783778e6"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/eaa67e139c9217099e2a7b717aeeb46c65de3494"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/f4933e1d11b97b6a0951648b7c3e53850e1b33a9"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/fd46668d538993218eea19c6925c868ac0f2630c"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    }
  ]
}

CVE-2026-72262 (GCVE-0-2026-72262)

Vulnerability from cvelistv5 – Published: 2026-08-15 05:54 – Updated: 2026-08-23 12:47

Title

ASoC: SOF: ipc3-control: Fix heap overflow in bytes_ext put/get

Summary

In the Linux kernel, the following vulnerability has been resolved: ASoC: SOF: ipc3-control: Fix heap overflow in bytes_ext put/get The ipc_control_data buffer is allocated as kzalloc(max_size), where max_size covers the entire struct sof_ipc_ctrl_data including its flexible array payload. However, the bounds checks in bytes_ext_put and _bytes_ext_get compared user data lengths against max_size directly, ignoring that cdata->data sits at an offset of sizeof(struct sof_ipc_ctrl_data) bytes into the allocation. This allowed writing up to sizeof(struct sof_ipc_ctrl_data) bytes past the end of the heap buffer from unprivileged userspace via the ALSA TLV kcontrol interface, and similarly allowed over-reading adjacent heap data on the get path. Fix all bounds checks to subtract sizeof(*cdata) from max_size so they reflect the actual space available at the cdata->data offset. Also fix the error-path restore in bytes_ext_put which wrote to cdata->data instead of cdata, causing the same overflow.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Assigner

Linux mitre root

References

6 references

URL	Tags
https://git.kernel.org/stable/c/af4b437a463ac0482…
https://git.kernel.org/stable/c/1adde1941bba7b0d7…
https://git.kernel.org/stable/c/eaa67e139c9217099…
https://git.kernel.org/stable/c/121577383b5cf221e…
https://git.kernel.org/stable/c/f4933e1d11b97b6a0…
https://git.kernel.org/stable/c/fd46668d538993218…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 , < af4b437a463ac0482ba705434a44da06783778e6 (git) Affected: 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 , < 1adde1941bba7b0d7104b86ed819d48d81cb0ad9 (git) Affected: 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 , < eaa67e139c9217099e2a7b717aeeb46c65de3494 (git) Affected: 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 , < 121577383b5cf221e86581e0f2bcca4c66f17469 (git) Affected: 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 , < f4933e1d11b97b6a0951648b7c3e53850e1b33a9 (git) Affected: 67ec2a091630c28ea8d05db2bd7178a05b04b7e6 , < fd46668d538993218eea19c6925c868ac0f2630c (git)
Linux	Linux	Affected: 5.18 Unaffected: 0 , < 5.18 (semver) Unaffected: 6.1.184 , ≤ 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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{
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "sound/soc/sof/ipc3-control.c"
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        }
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              "value": "AV:L - Exploitation requires a local ioctl on /dev/snd/controlC* (SNDRV_CTL_IOCTL_TLV_WRITE/READ) through the ALSA control device; there is no network, adjacent-radio, or physical-bus attack surface for this SOF IPC3 kcontrol path.\nAC:L - On affected SOF IPC3 systems with topology bytes_ext controls, an attacker can deterministically trigger the bug by issuing TLV writes with header.length equal to max_size, causing copy_from_user/memcpy to overrun the kzalloc(max_size) buffer by sizeof(struct sof_ipc_ctrl_data).\nPR:L - The fix commit states the overflow is reachable from unprivileged userspace via ALSA TLV kcontrols; any local user who can open the sound control device (typically membership in the audio group on Linux, or an app with audio access on Android/ChromeOS) can reach the vulnerable code without real root.\nUI:N - Exploitation is performed entirely by the attacker issuing ALSA TLV ioctls against an existing bytes_ext kcontrol; no victim click, mount, or other interactive action beyond the attacker\u0027s own access to the sound control interface is required.\nS:U - The vulnerability corrupts kernel heap memory from a local userspace context and enables standard kernel privilege escalation or denial of service; it does not cross a VM, container, or IOMMU security boundary into a separate authority.\nC:H - The get path can copy_to_user up to sizeof(struct sof_ipc_ctrl_data) bytes beyond the allocated ipc_control_data buffer, leaking adjacent kernel heap contents; combined with the controllable overflow, this is an out-of-bounds read/memory corruption primitive consistent with arbitrary disclosure potential.\nI:H - The put path performs an out-of-bounds heap write of up to sizeof(struct sof_ipc_ctrl_data) bytes past the kzalloc(max_size) allocation (including via the err_restore memcpy), enabling heap metadata/object corruption that can be developed into arbitrary kernel write or code execution.\nA:H - Heap out-of-bounds writes of roughly 96 bytes into adjacent slab objects can corrupt kernel structures and trigger oops/panic or wedged audio/subsystem state; repeated TLV operations make denial of service reliably achievable even without full exploitation."
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        {
          "url": "https://git.kernel.org/stable/c/fd46668d538993218eea19c6925c868ac0f2630c"
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      "title": "ASoC: SOF: ipc3-control: Fix heap overflow in bytes_ext put/get",
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    "cveId": "CVE-2026-72262",
    "datePublished": "2026-08-15T05:54:49.635Z",
    "dateReserved": "2026-08-09T03:40:39.915Z",
    "dateUpdated": "2026-08-23T12:47:11.302Z",
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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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

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GHSA-2HHX-3VXC-CW6X

CVE-2026-72262 (GCVE-0-2026-72262)

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Sightings

Nomenclature