GCVE Workshop - 22 September 2026 (14:00-18:00), Luxembourg Before The Vulnopticon Conference - Registration

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

Vulnerability from cvelistv5 – Published: 2026-08-15 05:54 – Updated: 2026-08-23 12:47
VLAI
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
References
Impacted products
Vendor Product Version CPE status
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)
guessed Create a notification for this product.
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)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "sound/soc/sof/ipc3-control.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "af4b437a463ac0482ba705434a44da06783778e6",
              "status": "affected",
              "version": "67ec2a091630c28ea8d05db2bd7178a05b04b7e6",
              "versionType": "git"
            },
            {
              "lessThan": "1adde1941bba7b0d7104b86ed819d48d81cb0ad9",
              "status": "affected",
              "version": "67ec2a091630c28ea8d05db2bd7178a05b04b7e6",
              "versionType": "git"
            },
            {
              "lessThan": "eaa67e139c9217099e2a7b717aeeb46c65de3494",
              "status": "affected",
              "version": "67ec2a091630c28ea8d05db2bd7178a05b04b7e6",
              "versionType": "git"
            },
            {
              "lessThan": "121577383b5cf221e86581e0f2bcca4c66f17469",
              "status": "affected",
              "version": "67ec2a091630c28ea8d05db2bd7178a05b04b7e6",
              "versionType": "git"
            },
            {
              "lessThan": "f4933e1d11b97b6a0951648b7c3e53850e1b33a9",
              "status": "affected",
              "version": "67ec2a091630c28ea8d05db2bd7178a05b04b7e6",
              "versionType": "git"
            },
            {
              "lessThan": "fd46668d538993218eea19c6925c868ac0f2630c",
              "status": "affected",
              "version": "67ec2a091630c28ea8d05db2bd7178a05b04b7e6",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "sound/soc/sof/ipc3-control.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.18"
            },
            {
              "lessThan": "5.18",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.184",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.184",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.145",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.97",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.40",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.5",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "5.18",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "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 - 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."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-23T12:47:11.302Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/af4b437a463ac0482ba705434a44da06783778e6"
        },
        {
          "url": "https://git.kernel.org/stable/c/1adde1941bba7b0d7104b86ed819d48d81cb0ad9"
        },
        {
          "url": "https://git.kernel.org/stable/c/eaa67e139c9217099e2a7b717aeeb46c65de3494"
        },
        {
          "url": "https://git.kernel.org/stable/c/121577383b5cf221e86581e0f2bcca4c66f17469"
        },
        {
          "url": "https://git.kernel.org/stable/c/f4933e1d11b97b6a0951648b7c3e53850e1b33a9"
        },
        {
          "url": "https://git.kernel.org/stable/c/fd46668d538993218eea19c6925c868ac0f2630c"
        }
      ],
      "title": "ASoC: SOF: ipc3-control: Fix heap overflow in bytes_ext put/get",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "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",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-72262",
      "date": "2026-09-04",
      "epss": "0.00177",
      "percentile": "0.07352"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-72262\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-15T06:21:54.443\",\"lastModified\":\"2026-08-23T13:16:42.910\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"sound/soc/sof/ipc3-control.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"67ec2a091630c28ea8d05db2bd7178a05b04b7e6\",\"lessThan\":\"af4b437a463ac0482ba705434a44da06783778e6\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"67ec2a091630c28ea8d05db2bd7178a05b04b7e6\",\"lessThan\":\"1adde1941bba7b0d7104b86ed819d48d81cb0ad9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"67ec2a091630c28ea8d05db2bd7178a05b04b7e6\",\"lessThan\":\"eaa67e139c9217099e2a7b717aeeb46c65de3494\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"67ec2a091630c28ea8d05db2bd7178a05b04b7e6\",\"lessThan\":\"121577383b5cf221e86581e0f2bcca4c66f17469\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"67ec2a091630c28ea8d05db2bd7178a05b04b7e6\",\"lessThan\":\"f4933e1d11b97b6a0951648b7c3e53850e1b33a9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"67ec2a091630c28ea8d05db2bd7178a05b04b7e6\",\"lessThan\":\"fd46668d538993218eea19c6925c868ac0f2630c\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"sound/soc/sof/ipc3-control.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.18\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.18\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.184\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.145\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.97\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.40\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.5\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"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:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/121577383b5cf221e86581e0f2bcca4c66f17469\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/1adde1941bba7b0d7104b86ed819d48d81cb0ad9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/af4b437a463ac0482ba705434a44da06783778e6\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/eaa67e139c9217099e2a7b717aeeb46c65de3494\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/f4933e1d11b97b6a0951648b7c3e53850e1b33a9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fd46668d538993218eea19c6925c868ac0f2630c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-08-19T05:26:07+00:00",
      "cve": "CVE-2026-72262",
      "id": "CVE-2026-72262",
      "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: Fix heap overflow in bytes_ext put/get",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-72262.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.