CVE-2025-71192 (GCVE-0-2025-71192)

Vulnerability from cvelistv5 – Published: 2026-02-04 16:00 – Updated: 2026-08-05 12:12
VLAI
Title
ALSA: ac97: fix a double free in snd_ac97_controller_register()
Summary
In the Linux kernel, the following vulnerability has been resolved: ALSA: ac97: fix a double free in snd_ac97_controller_register() If ac97_add_adapter() fails, put_device() is the correct way to drop the device reference. kfree() is not required. Add kfree() if idr_alloc() fails and in ac97_adapter_release() to do the cleanup. Found by code review.
Severity
7 (High)
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 6971 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 74426fbff66eea8e8d1f42c8238c268d1e63a832 , < c80f9b3349a99a9d5b295f5bbc23f544c5995ad7 (git)
Affected: 74426fbff66eea8e8d1f42c8238c268d1e63a832 , < 21f8bc5179bed91c3f946adb5e55d717b891960c (git)
Affected: 74426fbff66eea8e8d1f42c8238c268d1e63a832 , < fcc04c92cbb5497ce67c58dd2f0001bb87f40396 (git)
Affected: 74426fbff66eea8e8d1f42c8238c268d1e63a832 , < cb73d37ac18bc1716690ff5255a0ef1952827e9e (git)
Affected: 74426fbff66eea8e8d1f42c8238c268d1e63a832 , < 830988b6cf197e6dcffdfe2008c5738e6c6c3c0f (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.15
Unaffected: 0 , < 4.15 (semver)
Unaffected: 6.1.161 , ≤ 6.1.* (semver)
Unaffected: 6.6.121 , ≤ 6.6.* (semver)
Unaffected: 6.12.66 , ≤ 6.12.* (semver)
Unaffected: 6.18.6 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (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/ac97/bus.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "c80f9b3349a99a9d5b295f5bbc23f544c5995ad7",
              "status": "affected",
              "version": "74426fbff66eea8e8d1f42c8238c268d1e63a832",
              "versionType": "git"
            },
            {
              "lessThan": "21f8bc5179bed91c3f946adb5e55d717b891960c",
              "status": "affected",
              "version": "74426fbff66eea8e8d1f42c8238c268d1e63a832",
              "versionType": "git"
            },
            {
              "lessThan": "fcc04c92cbb5497ce67c58dd2f0001bb87f40396",
              "status": "affected",
              "version": "74426fbff66eea8e8d1f42c8238c268d1e63a832",
              "versionType": "git"
            },
            {
              "lessThan": "cb73d37ac18bc1716690ff5255a0ef1952827e9e",
              "status": "affected",
              "version": "74426fbff66eea8e8d1f42c8238c268d1e63a832",
              "versionType": "git"
            },
            {
              "lessThan": "830988b6cf197e6dcffdfe2008c5738e6c6c3c0f",
              "status": "affected",
              "version": "74426fbff66eea8e8d1f42c8238c268d1e63a832",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "sound/ac97/bus.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.15"
            },
            {
              "lessThan": "4.15",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.161",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.121",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.66",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "6.19",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.161",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.121",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.66",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.6",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.19",
                  "versionStartIncluding": "4.15",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: ac97: fix a double free in snd_ac97_controller_register()\n\nIf ac97_add_adapter() fails, put_device() is the correct way to drop\nthe device reference. kfree() is not required.\nAdd kfree() if idr_alloc() fails and in ac97_adapter_release() to do\nthe cleanup.\n\nFound by code review."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable registration path is reached locally through PXA2xx platform-driver probing or module autoload; network traffic and physical AC\u201997 input cannot reach it.\nAC:H - Exploitation requires the uncommon condition that device registration fail after device initialization, plus favorable heap reuse; an attacker can encourage memory pressure but cannot reliably control these conditions.\nPR:L - A basic local user can initiate ALSA autoload activity and shape memory pressure while kernel or udev performs probing; no attacker-held administrative capability is checked by the vulnerable function.\nUI:N - No separate victim action is required once platform probing or module autoload begins.\nS:U - The corruption occurs within the host kernel and does not cross a separate virtualization, IOMMU, or other security authority.\nC:H - Reusing the multiply freed controller allocation can overlap its embedded struct device with attacker-influenced heap objects, enabling disclosure of kernel pointers and potentially arbitrary kernel memory.\nI:H - Freelist corruption and overlapping allocations can modify kernel objects, including device release and type function pointers, making arbitrary writes and kernel code execution defensible.\nA:H - The double free can immediately trigger allocator corruption detection, an oops, or a kernel panic, and corrupted reuse can crash the system later."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:12:29.458Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/c80f9b3349a99a9d5b295f5bbc23f544c5995ad7"
        },
        {
          "url": "https://git.kernel.org/stable/c/21f8bc5179bed91c3f946adb5e55d717b891960c"
        },
        {
          "url": "https://git.kernel.org/stable/c/fcc04c92cbb5497ce67c58dd2f0001bb87f40396"
        },
        {
          "url": "https://git.kernel.org/stable/c/cb73d37ac18bc1716690ff5255a0ef1952827e9e"
        },
        {
          "url": "https://git.kernel.org/stable/c/830988b6cf197e6dcffdfe2008c5738e6c6c3c0f"
        }
      ],
      "title": "ALSA: ac97: fix a double free in snd_ac97_controller_register()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-71192",
    "datePublished": "2026-02-04T16:00:23.044Z",
    "dateReserved": "2026-01-31T11:36:51.189Z",
    "dateUpdated": "2026-08-05T12:12:29.458Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2025-71192",
      "date": "2026-11-02",
      "epss": "0.00135",
      "percentile": "0.02974"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "sound/ac97/bus.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "c80f9b3349a99a9d5b295f5bbc23f544c5995ad7",
                    "status": "affected",
                    "version": "74426fbff66eea8e8d1f42c8238c268d1e63a832",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "21f8bc5179bed91c3f946adb5e55d717b891960c",
                    "status": "affected",
                    "version": "74426fbff66eea8e8d1f42c8238c268d1e63a832",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "fcc04c92cbb5497ce67c58dd2f0001bb87f40396",
                    "status": "affected",
                    "version": "74426fbff66eea8e8d1f42c8238c268d1e63a832",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "cb73d37ac18bc1716690ff5255a0ef1952827e9e",
                    "status": "affected",
                    "version": "74426fbff66eea8e8d1f42c8238c268d1e63a832",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "830988b6cf197e6dcffdfe2008c5738e6c6c3c0f",
                    "status": "affected",
                    "version": "74426fbff66eea8e8d1f42c8238c268d1e63a832",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "sound/ac97/bus.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "4.15"
                  },
                  {
                    "lessThan": "4.15",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.1.*",
                    "status": "unaffected",
                    "version": "6.1.161",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.6.*",
                    "status": "unaffected",
                    "version": "6.6.121",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.12.*",
                    "status": "unaffected",
                    "version": "6.12.66",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.18.*",
                    "status": "unaffected",
                    "version": "6.18.6",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "6.19",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: ac97: fix a double free in snd_ac97_controller_register()\n\nIf ac97_add_adapter() fails, put_device() is the correct way to drop\nthe device reference. kfree() is not required.\nAdd kfree() if idr_alloc() fails and in ac97_adapter_release() to do\nthe cleanup.\n\nFound by code review."
          },
          {
            "lang": "es",
            "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nALSA: ac97: correcci\u00f3n de una doble liberaci\u00f3n en snd_ac97_controller_register()\n\nSi ac97_add_adapter() falla, put_device() es la forma correcta de liberar la referencia del dispositivo. kfree() no es necesario.\nA\u00f1adir kfree() si idr_alloc() falla y en ac97_adapter_release() para realizar la limpieza.\n\nEncontrado mediante revisi\u00f3n de c\u00f3digo."
          }
        ],
        "id": "CVE-2025-71192",
        "lastModified": "2026-07-30T06:24:55.620",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "HIGH",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.0,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.0,
              "impactScore": 5.9,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-02-04T16:16:18.770",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/21f8bc5179bed91c3f946adb5e55d717b891960c"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/830988b6cf197e6dcffdfe2008c5738e6c6c3c0f"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/c80f9b3349a99a9d5b295f5bbc23f544c5995ad7"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/cb73d37ac18bc1716690ff5255a0ef1952827e9e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/fcc04c92cbb5497ce67c58dd2f0001bb87f40396"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Deferred"
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-13T17:54:00+00:00",
      "cve": "CVE-2025-71192",
      "id": "CVE-2025-71192",
      "initial_release_date": "2025-01-01T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Kernel: Memory corruption via double free in ALSA AC97 controller",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-71192.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-10-30T01:02:02Z",
      "cve": "CVE-2025-71192",
      "id": "CVE-2025-71192",
      "initial_release_date": "2026-02-05T00:27:41Z",
      "product_status:known_affected": "462",
      "product_status:known_not_affected": "301",
      "product_status:recommended": "311",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2025-71192",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2025-71192.json",
      "version": "33"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Loading timeline…




    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.