Skip to content
Heist/ feed
Back to feed
HighFix available

ALSA: usb-audio: Add sanity check for OOB writes at silencing

Type: advisorySources: OSV

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Add sanity check for OOB writes at silencing At silencing the playback URB packets in the implicit fb mode before the actual playback, we blindly assume that the received packets fit with the buffer size. But when the setup in the capture stream differs from the playback stream (e.g. due to the USB core limitation of max packet size), such an inconsistency may lead to OOB writes to the buffer, resulting in a crash. For addressing it, add a sanity check of the transfer buffer size at prepare_silent_urb(), and stop the data copy if the received data overflows. Also, report back the transfer error properly from there, too. Note that this doesn't fix the root cause of the playback error itself, but this merely covers the kernel Oops.

Products
Kernel
Affected versions
Not specified
Fixed versions
5.15.202, 6.1.165, 6.12.75, 6.18.16, 6.19.6, 6.6.128
CVEs
CVE-2026-43279
Confirmed fixed CVEs
Not specified
Updated in this feed
7 Nov 2026, 17:49 UTC · Revision 1

Source evidence

ALSA: usb-audio: Add sanity check for OOB writes at silencing

core-osv · Original source

Published 6 May 2026, 11:29 UTC

In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Add sanity check for OOB writes at silencing At silencing the playback URB packets in the implicit fb mode before the actual playback, we blindly assume that the received packets fit with the buffer size. But when the setup in the capture stream differs from the playback stream (e.g. due to the USB core limitation of max packet size), such an inconsistency may lead to OOB writes to the buffer, resulting in a crash. For addressing it, add a sanity check of the transfer buffer size at prepare_silent_urb(), and stop the data copy if the received data overflows. Also, report back the transfer error properly from there, too. Note that this doesn't fix the root cause of the playback error itself, but this merely covers the kernel Oops.

osv:CVE-2026-43279

Kernel

Fixed versions: 5.15.202, 6.1.165, 6.6.128, 6.12.75, 6.18.16, 6.19.6

Complete source record
{
  "id": "1033d2f4ab366dc09192cb8678f1fa68af8ae7fb8220e8d14b3772c74936ad1f",
  "url": "https://osv.dev/vulnerability/CVE-2026-43279",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "ALSA: usb-audio: Add sanity check for OOB writes at silencing",
    "summary": "In the Linux kernel, the following vulnerability has been resolved: ALSA: usb-audio: Add sanity check for OOB writes at silencing At silencing the playback URB packets in the implicit fb mode before the actual playback, we blindly assume that the received packets fit with the buffer size. But when the setup in the capture stream differs from the playback stream (e.g. due to the USB core limitation of max packet size), such an inconsistency may lead to OOB writes to the buffer, resulting in a crash. For addressing it, add a sanity check of the transfer buffer size at prepare_silent_urb(), and stop the data copy if the received data overflows. Also, report back the transfer error properly from there, too. Note that this doesn't fix the root cause of the playback error itself, but this merely covers the kernel Oops.",
    "evidence": "osv:CVE-2026-43279",
    "products": [
      {
        "name": {
          "value": "Kernel",
          "evidence": "/affected/1/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.15.202",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.1.165",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.6.128",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.12.75",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.18.16",
            "evidence": "/affected/1/ranges"
          },
          {
            "value": "6.19.6",
            "evidence": "/affected/1/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "high",
    "structured": {
      "id": "CVE-2026-43279",
      "aliases": [
        "CVE-2026-43279"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
              "type": "GIT",
              "events": [
                {
                  "introduced": "c75a8a7ae565d7cd9baa87a504ba9162e355b4b0"
                },
                {
                  "fixed": "fa01973bb79d70c4736b6a4b2de99fbb2cbc8d1f"
                },
                {
                  "fixed": "780dc57794a217b49994fa1d0b42465fb10a00aa"
                },
                {
                  "fixed": "8995fc0e00b3fee9bf7ecb3d836b635b730c1049"
                },
                {
                  "fixed": "fc9e5af60dc199051dc202ae78e1fe76a9977a5e"
                },
                {
                  "fixed": "6af16f1b8649df4c00d6ced924bdd8b72c885b6a"
                },
                {
                  "fixed": "ccaf9296763be4f76b59e2cac377006016c34435"
                },
                {
                  "fixed": "fba2105a157fffcf19825e4eea498346738c9948"
                }
              ]
            }
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43279.json"
          }
        },
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "3.5.0"
                },
                {
                  "fixed": "5.15.202"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "5.16.0"
                },
                {
                  "fixed": "6.1.165"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.2.0"
                },
                {
                  "fixed": "6.6.128"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.7.0"
                },
                {
                  "fixed": "6.12.75"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.13.0"
                },
                {
                  "fixed": "6.18.16"
                }
              ]
            },
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "6.19.0"
                },
                {
                  "fixed": "6.19.6"
                }
              ]
            }
          ],
          "package": {
            "name": "Kernel",
            "ecosystem": "Linux"
          },
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-43279.json"
          }
        }
      ],
      "modified": "2026-10-28T02:30:51.306872305Z",
      "provider": "osv",
      "references": [
        "https://git.kernel.org/stable/c/6af16f1b8649df4c00d6ced924bdd8b72c885b6a",
        "https://git.kernel.org/stable/c/780dc57794a217b49994fa1d0b42465fb10a00aa",
        "https://git.kernel.org/stable/c/8995fc0e00b3fee9bf7ecb3d836b635b730c1049",
        "https://git.kernel.org/stable/c/ccaf9296763be4f76b59e2cac377006016c34435",
        "https://git.kernel.org/stable/c/fa01973bb79d70c4736b6a4b2de99fbb2cbc8d1f",
        "https://git.kernel.org/stable/c/fba2105a157fffcf19825e4eea498346738c9948",
        "https://git.kernel.org/stable/c/fc9e5af60dc199051dc202ae78e1fe76a9977a5e",
        "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43279.json",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-43279",
        "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"
      ],
      "provider_metadata": {
        "cna_assigner": "Linux",
        "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/43xxx/CVE-2026-43279.json"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-43279",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 520019,
  "published_at": "2026-05-06T11:29:00.844+00:00"
}