GHSA-R63G-3MCQ-69JV
Vulnerability from github – Published: 2026-09-16 12:30 – Updated: 2026-09-16 12:30In 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.
{
"affected": [],
"aliases": [
"CVE-2026-89895"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-09-16T11:16:58Z",
"severity": null
},
"details": "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": "GHSA-r63g-3mcq-69jv",
"modified": "2026-09-16T12:30:40Z",
"published": "2026-09-16T12:30:40Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-89895"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/3a7d6b9c4cb5ac18cbd3f1c7f8c7b159c42ba0b1"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/42e00371f83c3fc7b99a36bf0229c74ad5d3c7d8"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/61dfa8ded5efc3a25d331fa9ce5cebb85531fe70"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/6cbc8a73b3464ebeccc49987b7233b6b087b8504"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/75bbf45e3a954e292ae26832d2df40ca2e3ee452"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/8c6610e230b9355cf7df5a338a0592c0f088c00b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/cb1218da234ea15fa14d90e2d049d686874d7aa3"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/fe65028ee72a7e07e572b351891bd7a1f8917d33"
}
],
"schema_version": "1.4.0",
"severity": []
}
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.
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.
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.