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CVE-2026-31581 (GCVE-0-2026-31581)

Vulnerability from cvelistv5 – Published: 2026-04-24 14:42 – Updated: 2026-06-14 17:42
VLAI
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)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted 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 Create a notification for this product.
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 Create a notification for this product.
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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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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/e719232f4552e29de8027a83918ea94434be87af"
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        {
          "url": "https://git.kernel.org/stable/c/e247a0e01d15ed420f77ec5e2335721bf430a5b3"
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          "url": "https://git.kernel.org/stable/c/af75b486f7e883e3422ece23c8d727e6815144a0"
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          "url": "https://git.kernel.org/stable/c/b9c826916fdce6419b94eb0cd8810fdac18c2386"
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      "title": "ALSA: 6fire: fix use-after-free on disconnect",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31581",
    "datePublished": "2026-04-24T14:42:11.557Z",
    "dateReserved": "2026-03-09T15:48:24.119Z",
    "dateUpdated": "2026-06-14T17:42:07.970Z",
    "state": "PUBLISHED"
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  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-31581",
      "date": "2026-09-16",
      "epss": "0.00128",
      "percentile": "0.02785"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-31581\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-04-24T15:16:32.797\",\"lastModified\":\"2026-06-17T10:34:01.257\",\"vulnStatus\":\"Modified\",\"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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"sound/usb/6fire/chip.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"f2d06d4e129e2508e356136f99bb20a332ff1a00\",\"lessThan\":\"e719232f4552e29de8027a83918ea94434be87af\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b889a7d68d7e76b8795b754a75c91a2d561d5e8c\",\"lessThan\":\"e247a0e01d15ed420f77ec5e2335721bf430a5b3\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ea8cc56db659cf0ae57073e32a4735ead7bd7ee3\",\"lessThan\":\"ba88461f7653636c48321ca993006a74724c2f41\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"b754e831a94f82f2593af806741392903f359168\",\"lessThan\":\"e88354b381e2006de63d6b052ed7005c9a47d00e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"57860a80f03f9dc69a34a5c37b0941ad032a0a8c\",\"lessThan\":\"af75b486f7e883e3422ece23c8d727e6815144a0\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a0810c3d6dd2d29a9b92604d682eacd2902ce947\",\"lessThan\":\"d21e8a2af4869b5890b34e081d5aeadc93e9cd5c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a0810c3d6dd2d29a9b92604d682eacd2902ce947\",\"lessThan\":\"3dc20d1981d6a67d8184498a5da272942dde1e65\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a0810c3d6dd2d29a9b92604d682eacd2902ce947\",\"lessThan\":\"51f6532790b74ffdd6970bc848358a2838c1c185\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"a0810c3d6dd2d29a9b92604d682eacd2902ce947\",\"lessThan\":\"b9c826916fdce6419b94eb0cd8810fdac18c2386\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"74357d0b5cd3ef544752bc9f21cbeee4902fae6c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"273eec23467dfbfbd0e4c10302579ba441fb1e13\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0df7f4b5cc10f5adf98be0845372e9eef7bb5b09\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"5.10.231\",\"lessThan\":\"5.10.258\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.15.174\",\"lessThan\":\"5.15.209\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.1.120\",\"lessThan\":\"6.1.175\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.6.64\",\"lessThan\":\"6.6.136\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.12.2\",\"lessThan\":\"6.12.83\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.19.325\",\"lessThan\":\"4.20\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.4.287\",\"lessThan\":\"5.5\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.11.11\",\"lessThan\":\"6.12\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"sound/usb/6fire/chip.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.13\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.13\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.258\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.209\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.175\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.136\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.83\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.24\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.19.14\",\"lessThanOrEqual\":\"6.19.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.0.1\",\"lessThanOrEqual\":\"7.0.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"weaknesses\":[{\"source\":\"nvd@nist.gov\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-416\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionEndExcluding\":\"6.6.136\",\"matchCriteriaId\":\"14109CEF-714B-4029-A318-97AA58A01833\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.12\",\"versionEndExcluding\":\"6.12.83\",\"matchCriteriaId\":\"A8BAD957-8E20-401C-A129-DFF3655CA0B7\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.13\",\"versionEndExcluding\":\"6.18.24\",\"matchCriteriaId\":\"8126B8B8-6D0B-4443-86C1-672AEE893555\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"6.19\",\"versionEndExcluding\":\"6.19.14\",\"matchCriteriaId\":\"D6A8A074-BBF4-4803-ABED-519A839435BB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"7.0\",\"versionEndExcluding\":\"7.0.1\",\"matchCriteriaId\":\"9B5888AB-7403-4335-89E4-21CC0B48366A\"}]}]}],\"references\":[{\"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\",\"tags\":[\"Patch\"]},{\"url\":\"https://git.kernel.org/stable/c/ba88461f7653636c48321ca993006a74724c2f41\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d21e8a2af4869b5890b34e081d5aeadc93e9cd5c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]},{\"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\"},{\"url\":\"https://git.kernel.org/stable/c/e88354b381e2006de63d6b052ed7005c9a47d00e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"tags\":[\"Patch\"]}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-28T07:26:36+00:00",
      "cve": "CVE-2026-31581",
      "id": "CVE-2026-31581",
      "initial_release_date": "2026-04-24T00:00:00+00:00",
      "product_status:fixed": "762",
      "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": "2026-09-11T01:30:33Z",
      "cve": "CVE-2026-31581",
      "id": "CVE-2026-31581",
      "initial_release_date": "2026-04-25T01:38:51Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "710",
      "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": "17"
    }
  }
}



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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.

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.


Detection rules are retrieved from Rulezet.


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.