Skip to content
Heist/ feed
Unrated

ALSA: control: Validate buf_len before strnlen() in snd_ctl_elem_init_enum_names()

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: ALSA: control: Validate buf_len before strnlen() in snd_ctl_elem_init_enum_names() snd_ctl_elem_init_enum_names() advances pointer p through the names buffer while decrementing buf_len. If buf_len reaches zero but items remain, the next iteration calls strnlen(p, 0). While strnlen(p, 0) returns 0 and would hit the existing name_len == 0 error path, CONFIG_FORTIFY_SOURCE's fortified strnlen() first checks maxlen against __builtin_dynamic_object_size(). When Clang loses track of p's object size inside the loop, this triggers a BRK exception panic before the return value is examined. Add a buf_len == 0 guard at the loop entry to prevent calling fortified strnlen() on an exhausted buffer. Found by kernel fuzz testing through Xiaomi Smartphone.

Announced Source revision 1
Original source ↗

CVE-2026-46088

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-46088

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4",
        "lessThan": "708f6ec9bcdf58bfd561409110baaf4fd3be4ea3",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4",
        "lessThan": "bfcbb4994da9e979c4bcfcf24aaaac69e457e48e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4",
        "lessThan": "a470f7cabc4df72d9bd132f5719a8717292bb440",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4",
        "lessThan": "1fbe46d2b72754d8bd580e13e59ccb5d3d0e8cb0",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4",
        "lessThan": "8ba0214c3dd32b8ec652947e3f2bc5b8f6e6be9e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4",
        "lessThan": "654c818a69c21d2bea4e8fd9eae7da865df9a5c8",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4",
        "lessThan": "82012fd3e78a14360fbc2f1a7491589896704f97",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "8d448162bda5ae3b5ecb26fe50c8fbbeae99faa4",
        "lessThan": "e0da8a8cac74f4b9f577979d131f0d2b88a84487",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "sound/core/control.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.2"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.2",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.258",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.209",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.175",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.140",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.86",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.27",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.0.4",
        "versionType": "semver",
        "lessThanOrEqual": "7.0.*"
      },
      {
        "status": "unaffected",
        "version": "7.1",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "sound/core/control.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-46088

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#28387 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement