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

Vulnerability from cvelistv5 – Published: 2026-09-16 10:31 – Updated: 2026-09-16 10:31
VLAI
Title
media: cobalt: Avoid freeing ALSA private data twice
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.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
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)
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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)
guessed Create a notification for this product.
Show details on NVD website
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    "dateReserved": "2026-09-11T19:38:34.773Z",
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            "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."
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      "current_release_date": "2026-09-19T01:43:22Z",
      "cve": "CVE-2026-89895",
      "id": "CVE-2026-89895",
      "initial_release_date": "2026-09-17T16:35:41Z",
      "product_status:known_affected": "269",
      "product_status:known_not_affected": "78",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-89895",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-89895.json",
      "version": "3"
    }
  }
}



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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.

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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.
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  • 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.



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