Vulnerability-Lookup

FKIE_CVE-2026-89895

Vulnerability from fkie_nvd - Published: 2026-09-16 11:16 - Updated: 2026-09-16 11:16

Severity

Summary

In the Linux kernel, the following vulnerability has been resolved: media: cobalt: Avoid freeing ALSA private data twice snd_cobalt_card_create() stores cobsc in sc->private_data and installs snd_cobalt_card_private_free() as sc->private_free. From that point, snd_card_free(sc) releases cobsc through the ALSA card cleanup path. If cobalt_alsa_init() fails after snd_cobalt_card_create(), the err_exit_free path calls snd_card_free(sc) and then kfree(cobsc). That second free releases the same object again. Remove the explicit kfree(cobsc) and leave ownership with the ALSA card. This issue was found by a static analysis checker and confirmed by manual source review.

References

	URL	Tags
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/3a7d6b9c4cb5ac18cbd3f1c7f8c7b159c42ba0b1
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/42e00371f83c3fc7b99a36bf0229c74ad5d3c7d8
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/61dfa8ded5efc3a25d331fa9ce5cebb85531fe70
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/6cbc8a73b3464ebeccc49987b7233b6b087b8504
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/75bbf45e3a954e292ae26832d2df40ca2e3ee452
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8c6610e230b9355cf7df5a338a0592c0f088c00b
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/cb1218da234ea15fa14d90e2d049d686874d7aa3
	416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/fe65028ee72a7e07e572b351891bd7a1f8917d33

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/pci/cobalt/cobalt-alsa-main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "75bbf45e3a954e292ae26832d2df40ca2e3ee452",
              "status": "affected",
              "version": "85756a069c55e0315ac5990806899cfb607b987f",
              "versionType": "git"
            },
            {
              "lessThan": "fe65028ee72a7e07e572b351891bd7a1f8917d33",
              "status": "affected",
              "version": "85756a069c55e0315ac5990806899cfb607b987f",
              "versionType": "git"
            },
            {
              "lessThan": "61dfa8ded5efc3a25d331fa9ce5cebb85531fe70",
              "status": "affected",
              "version": "85756a069c55e0315ac5990806899cfb607b987f",
              "versionType": "git"
            },
            {
              "lessThan": "42e00371f83c3fc7b99a36bf0229c74ad5d3c7d8",
              "status": "affected",
              "version": "85756a069c55e0315ac5990806899cfb607b987f",
              "versionType": "git"
            },
            {
              "lessThan": "6cbc8a73b3464ebeccc49987b7233b6b087b8504",
              "status": "affected",
              "version": "85756a069c55e0315ac5990806899cfb607b987f",
              "versionType": "git"
            },
            {
              "lessThan": "cb1218da234ea15fa14d90e2d049d686874d7aa3",
              "status": "affected",
              "version": "85756a069c55e0315ac5990806899cfb607b987f",
              "versionType": "git"
            },
            {
              "lessThan": "8c6610e230b9355cf7df5a338a0592c0f088c00b",
              "status": "affected",
              "version": "85756a069c55e0315ac5990806899cfb607b987f",
              "versionType": "git"
            },
            {
              "lessThan": "3a7d6b9c4cb5ac18cbd3f1c7f8c7b159c42ba0b1",
              "status": "affected",
              "version": "85756a069c55e0315ac5990806899cfb607b987f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/pci/cobalt/cobalt-alsa-main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.2"
            },
            {
              "lessThan": "4.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "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\nmedia: cobalt: Avoid freeing ALSA private data twice\n\nsnd_cobalt_card_create() stores cobsc in sc-\u003eprivate_data and installs\nsnd_cobalt_card_private_free() as sc-\u003eprivate_free. From that point,\nsnd_card_free(sc) releases cobsc through the ALSA card cleanup path.\n\nIf cobalt_alsa_init() fails after snd_cobalt_card_create(), the\nerr_exit_free path calls snd_card_free(sc) and then kfree(cobsc). That\nsecond free releases the same object again.\n\nRemove the explicit kfree(cobsc) and leave ownership with the ALSA card.\n\nThis issue was found by a static analysis checker and confirmed by\nmanual source review."
    }
  ],
  "id": "CVE-2026-89895",
  "lastModified": "2026-09-16T11:16:58.270",
  "metrics": {},
  "published": "2026-09-16T11:16:58.270",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/3a7d6b9c4cb5ac18cbd3f1c7f8c7b159c42ba0b1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/42e00371f83c3fc7b99a36bf0229c74ad5d3c7d8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/61dfa8ded5efc3a25d331fa9ce5cebb85531fe70"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6cbc8a73b3464ebeccc49987b7233b6b087b8504"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/75bbf45e3a954e292ae26832d2df40ca2e3ee452"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/8c6610e230b9355cf7df5a338a0592c0f088c00b"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/cb1218da234ea15fa14d90e2d049d686874d7aa3"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/fe65028ee72a7e07e572b351891bd7a1f8917d33"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}

CVE-2026-89895 (GCVE-0-2026-89895)

Vulnerability from cvelistv5 – Published: 2026-09-16 10:31 – Updated: 2026-09-16 10:31

Title

media: cobalt: Avoid freeing ALSA private data twice

Summary

Severity

No CVSS data available.

Assigner

Linux mitre root

References

8 references

URL	Tags
https://git.kernel.org/stable/c/75bbf45e3a954e292…
https://git.kernel.org/stable/c/fe65028ee72a7e07e…
https://git.kernel.org/stable/c/61dfa8ded5efc3a25…
https://git.kernel.org/stable/c/42e00371f83c3fc7b…
https://git.kernel.org/stable/c/6cbc8a73b3464ebec…
https://git.kernel.org/stable/c/cb1218da234ea15fa…
https://git.kernel.org/stable/c/8c6610e230b9355cf…
https://git.kernel.org/stable/c/3a7d6b9c4cb5ac18c…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 85756a069c55e0315ac5990806899cfb607b987f , < 75bbf45e3a954e292ae26832d2df40ca2e3ee452 (git) Affected: 85756a069c55e0315ac5990806899cfb607b987f , < fe65028ee72a7e07e572b351891bd7a1f8917d33 (git) Affected: 85756a069c55e0315ac5990806899cfb607b987f , < 61dfa8ded5efc3a25d331fa9ce5cebb85531fe70 (git) Affected: 85756a069c55e0315ac5990806899cfb607b987f , < 42e00371f83c3fc7b99a36bf0229c74ad5d3c7d8 (git) Affected: 85756a069c55e0315ac5990806899cfb607b987f , < 6cbc8a73b3464ebeccc49987b7233b6b087b8504 (git) Affected: 85756a069c55e0315ac5990806899cfb607b987f , < cb1218da234ea15fa14d90e2d049d686874d7aa3 (git) Affected: 85756a069c55e0315ac5990806899cfb607b987f , < 8c6610e230b9355cf7df5a338a0592c0f088c00b (git) Affected: 85756a069c55e0315ac5990806899cfb607b987f , < 3a7d6b9c4cb5ac18cbd3f1c7f8c7b159c42ba0b1 (git)
Linux	Linux	Affected: 4.2 Unaffected: 0 , < 4.2 (semver) Unaffected: 5.10.270 , ≤ 5.10.* (semver) Unaffected: 5.15.221 , ≤ 5.15.* (semver) Unaffected: 6.1.188 , ≤ 6.1.* (semver) Unaffected: 6.6.157 , ≤ 6.6.* (semver) Unaffected: 6.12.110 , ≤ 6.12.* (semver) Unaffected: 6.18.51 , ≤ 6.18.* (semver) Unaffected: 7.2.5 , ≤ 7.2.* (semver) Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/pci/cobalt/cobalt-alsa-main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "75bbf45e3a954e292ae26832d2df40ca2e3ee452",
              "status": "affected",
              "version": "85756a069c55e0315ac5990806899cfb607b987f",
              "versionType": "git"
            },
            {
              "lessThan": "fe65028ee72a7e07e572b351891bd7a1f8917d33",
              "status": "affected",
              "version": "85756a069c55e0315ac5990806899cfb607b987f",
              "versionType": "git"
            },
            {
              "lessThan": "61dfa8ded5efc3a25d331fa9ce5cebb85531fe70",
              "status": "affected",
              "version": "85756a069c55e0315ac5990806899cfb607b987f",
              "versionType": "git"
            },
            {
              "lessThan": "42e00371f83c3fc7b99a36bf0229c74ad5d3c7d8",
              "status": "affected",
              "version": "85756a069c55e0315ac5990806899cfb607b987f",
              "versionType": "git"
            },
            {
              "lessThan": "6cbc8a73b3464ebeccc49987b7233b6b087b8504",
              "status": "affected",
              "version": "85756a069c55e0315ac5990806899cfb607b987f",
              "versionType": "git"
            },
            {
              "lessThan": "cb1218da234ea15fa14d90e2d049d686874d7aa3",
              "status": "affected",
              "version": "85756a069c55e0315ac5990806899cfb607b987f",
              "versionType": "git"
            },
            {
              "lessThan": "8c6610e230b9355cf7df5a338a0592c0f088c00b",
              "status": "affected",
              "version": "85756a069c55e0315ac5990806899cfb607b987f",
              "versionType": "git"
            },
            {
              "lessThan": "3a7d6b9c4cb5ac18cbd3f1c7f8c7b159c42ba0b1",
              "status": "affected",
              "version": "85756a069c55e0315ac5990806899cfb607b987f",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/pci/cobalt/cobalt-alsa-main.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "4.2"
            },
            {
              "lessThan": "4.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.270",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.221",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.188",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.110",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.51",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.5",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "4.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: cobalt: Avoid freeing ALSA private data twice\n\nsnd_cobalt_card_create() stores cobsc in sc-\u003eprivate_data and installs\nsnd_cobalt_card_private_free() as sc-\u003eprivate_free. From that point,\nsnd_card_free(sc) releases cobsc through the ALSA card cleanup path.\n\nIf cobalt_alsa_init() fails after snd_cobalt_card_create(), the\nerr_exit_free path calls snd_card_free(sc) and then kfree(cobsc). That\nsecond free releases the same object again.\n\nRemove the explicit kfree(cobsc) and leave ownership with the ALSA card.\n\nThis issue was found by a static analysis checker and confirmed by\nmanual source review."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-16T10:31:56.817Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/75bbf45e3a954e292ae26832d2df40ca2e3ee452"
        },
        {
          "url": "https://git.kernel.org/stable/c/fe65028ee72a7e07e572b351891bd7a1f8917d33"
        },
        {
          "url": "https://git.kernel.org/stable/c/61dfa8ded5efc3a25d331fa9ce5cebb85531fe70"
        },
        {
          "url": "https://git.kernel.org/stable/c/42e00371f83c3fc7b99a36bf0229c74ad5d3c7d8"
        },
        {
          "url": "https://git.kernel.org/stable/c/6cbc8a73b3464ebeccc49987b7233b6b087b8504"
        },
        {
          "url": "https://git.kernel.org/stable/c/cb1218da234ea15fa14d90e2d049d686874d7aa3"
        },
        {
          "url": "https://git.kernel.org/stable/c/8c6610e230b9355cf7df5a338a0592c0f088c00b"
        },
        {
          "url": "https://git.kernel.org/stable/c/3a7d6b9c4cb5ac18cbd3f1c7f8c7b159c42ba0b1"
        }
      ],
      "title": "media: cobalt: Avoid freeing ALSA private data twice",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89895",
    "datePublished": "2026-09-16T10:31:56.817Z",
    "dateReserved": "2026-09-11T19:38:34.773Z",
    "dateUpdated": "2026-09-16T10:31:56.817Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

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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.
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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.

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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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FKIE_CVE-2026-89895

CVE-2026-89895 (GCVE-0-2026-89895)

Tags

Sightings

Nomenclature

Related by attack behaviour