CVE-2026-31581 (GCVE-0-2026-31581)
Vulnerability from cvelistv5 – Published: 2026-04-24 14:42 – Updated: 2026-06-14 17:42
VLAI
EPSS
VEX
Title
ALSA: 6fire: fix use-after-free on disconnect
Summary
In the Linux kernel, the following vulnerability has been resolved:
ALSA: 6fire: fix use-after-free on disconnect
In usb6fire_chip_abort(), the chip struct is allocated as the card's
private data (via snd_card_new with sizeof(struct sfire_chip)). When
snd_card_free_when_closed() is called and no file handles are open, the
card and embedded chip are freed synchronously. The subsequent
chip->card = NULL write then hits freed slab memory.
Call trace:
usb6fire_chip_abort sound/usb/6fire/chip.c:59 [inline]
usb6fire_chip_disconnect+0x348/0x358 sound/usb/6fire/chip.c:182
usb_unbind_interface+0x1a8/0x88c drivers/usb/core/driver.c:458
...
hub_event+0x1a04/0x4518 drivers/usb/core/hub.c:5953
Fix by moving the card lifecycle out of usb6fire_chip_abort() and into
usb6fire_chip_disconnect(). The card pointer is saved in a local
before any teardown, snd_card_disconnect() is called first to prevent
new opens, URBs are aborted while chip is still valid, and
snd_card_free_when_closed() is called last so chip is never accessed
after the card may be freed.
Severity
7.8 (High)
Assigner
References
9 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
f2d06d4e129e2508e356136f99bb20a332ff1a00 , < e719232f4552e29de8027a83918ea94434be87af
(git)
Affected: b889a7d68d7e76b8795b754a75c91a2d561d5e8c , < e247a0e01d15ed420f77ec5e2335721bf430a5b3 (git) Affected: ea8cc56db659cf0ae57073e32a4735ead7bd7ee3 , < ba88461f7653636c48321ca993006a74724c2f41 (git) Affected: b754e831a94f82f2593af806741392903f359168 , < e88354b381e2006de63d6b052ed7005c9a47d00e (git) Affected: 57860a80f03f9dc69a34a5c37b0941ad032a0a8c , < af75b486f7e883e3422ece23c8d727e6815144a0 (git) Affected: a0810c3d6dd2d29a9b92604d682eacd2902ce947 , < d21e8a2af4869b5890b34e081d5aeadc93e9cd5c (git) Affected: a0810c3d6dd2d29a9b92604d682eacd2902ce947 , < 3dc20d1981d6a67d8184498a5da272942dde1e65 (git) Affected: a0810c3d6dd2d29a9b92604d682eacd2902ce947 , < 51f6532790b74ffdd6970bc848358a2838c1c185 (git) Affected: a0810c3d6dd2d29a9b92604d682eacd2902ce947 , < b9c826916fdce6419b94eb0cd8810fdac18c2386 (git) Affected: 74357d0b5cd3ef544752bc9f21cbeee4902fae6c (git) Affected: 273eec23467dfbfbd0e4c10302579ba441fb1e13 (git) Affected: 0df7f4b5cc10f5adf98be0845372e9eef7bb5b09 (git) Affected: 5.10.231 , < 5.10.258 (semver) Affected: 5.15.174 , < 5.15.209 (semver) Affected: 6.1.120 , < 6.1.175 (semver) Affected: 6.6.64 , < 6.6.136 (semver) Affected: 6.12.2 , < 6.12.83 (semver) Affected: 4.19.325 , < 4.20 (semver) Affected: 5.4.287 , < 5.5 (semver) Affected: 6.11.11 , < 6.12 (semver) |
guessed | |
| Linux | Linux |
Affected:
6.13
Unaffected: 0 , < 6.13 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.136 , ≤ 6.6.* (semver) Unaffected: 6.12.83 , ≤ 6.12.* (semver) Unaffected: 6.18.24 , ≤ 6.18.* (semver) Unaffected: 6.19.14 , ≤ 6.19.* (semver) Unaffected: 7.0.1 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix) |
guessed |
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: 6fire: fix use-after-free on disconnect\n\nIn usb6fire_chip_abort(), the chip struct is allocated as the card\u0027s\nprivate data (via snd_card_new with sizeof(struct sfire_chip)). When\nsnd_card_free_when_closed() is called and no file handles are open, the\ncard and embedded chip are freed synchronously. The subsequent\nchip-\u003ecard = NULL write then hits freed slab memory.\n\nCall trace:\n usb6fire_chip_abort sound/usb/6fire/chip.c:59 [inline]\n usb6fire_chip_disconnect+0x348/0x358 sound/usb/6fire/chip.c:182\n usb_unbind_interface+0x1a8/0x88c drivers/usb/core/driver.c:458\n ...\n hub_event+0x1a04/0x4518 drivers/usb/core/hub.c:5953\n\nFix by moving the card lifecycle out of usb6fire_chip_abort() and into\nusb6fire_chip_disconnect(). The card pointer is saved in a local\nbefore any teardown, snd_card_disconnect() is called first to prevent\nnew opens, URBs are aborted while chip is still valid, and\nsnd_card_free_when_closed() is called last so chip is never accessed\nafter the card may be freed."
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"title": "ALSA: 6fire: fix use-after-free on disconnect",
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"versionStartIncluding": "6.19",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"matchCriteriaId": "9B5888AB-7403-4335-89E4-21CC0B48366A",
"versionEndExcluding": "7.0.1",
"versionStartIncluding": "7.0",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: 6fire: fix use-after-free on disconnect\n\nIn usb6fire_chip_abort(), the chip struct is allocated as the card\u0027s\nprivate data (via snd_card_new with sizeof(struct sfire_chip)). When\nsnd_card_free_when_closed() is called and no file handles are open, the\ncard and embedded chip are freed synchronously. The subsequent\nchip-\u003ecard = NULL write then hits freed slab memory.\n\nCall trace:\n usb6fire_chip_abort sound/usb/6fire/chip.c:59 [inline]\n usb6fire_chip_disconnect+0x348/0x358 sound/usb/6fire/chip.c:182\n usb_unbind_interface+0x1a8/0x88c drivers/usb/core/driver.c:458\n ...\n hub_event+0x1a04/0x4518 drivers/usb/core/hub.c:5953\n\nFix by moving the card lifecycle out of usb6fire_chip_abort() and into\nusb6fire_chip_disconnect(). The card pointer is saved in a local\nbefore any teardown, snd_card_disconnect() is called first to prevent\nnew opens, URBs are aborted while chip is still valid, and\nsnd_card_free_when_closed() is called last so chip is never accessed\nafter the card may be freed."
}
],
"id": "CVE-2026-31581",
"lastModified": "2026-06-17T10:34:01.257",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2026-04-24T15:16:32.797",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/3dc20d1981d6a67d8184498a5da272942dde1e65"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/51f6532790b74ffdd6970bc848358a2838c1c185"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/af75b486f7e883e3422ece23c8d727e6815144a0"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/b9c826916fdce6419b94eb0cd8810fdac18c2386"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/ba88461f7653636c48321ca993006a74724c2f41"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/d21e8a2af4869b5890b34e081d5aeadc93e9cd5c"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/e247a0e01d15ed420f77ec5e2335721bf430a5b3"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/e719232f4552e29de8027a83918ea94434be87af"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"tags": [
"Patch"
],
"url": "https://git.kernel.org/stable/c/e88354b381e2006de63d6b052ed7005c9a47d00e"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-416"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-10-07T10:31:32+00:00",
"cve": "CVE-2026-31581",
"id": "CVE-2026-31581",
"initial_release_date": "2026-04-24T00:00:00+00:00",
"product_status:fixed": "1624",
"product_status:known_affected": "50",
"product_status:known_not_affected": "14",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: ALSA: 6fire: fix use-after-free on disconnect",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-31581.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-10-01T01:31:57Z",
"cve": "CVE-2026-31581",
"id": "CVE-2026-31581",
"initial_release_date": "2026-04-25T01:38:51Z",
"product_status:known_affected": "712",
"product_status:recommended": "357",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2026-31581",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-31581.json",
"version": "18"
}
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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
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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.
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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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.