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
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)
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)
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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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      "providerMetadata": {
        "dateUpdated": "2026-06-14T17:42:07.970Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "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/ba88461f7653636c48321ca993006a74724c2f41"
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        {
          "url": "https://git.kernel.org/stable/c/e88354b381e2006de63d6b052ed7005c9a47d00e"
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        {
          "url": "https://git.kernel.org/stable/c/af75b486f7e883e3422ece23c8d727e6815144a0"
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        },
        {
          "url": "https://git.kernel.org/stable/c/b9c826916fdce6419b94eb0cd8810fdac18c2386"
        }
      ],
      "title": "ALSA: 6fire: fix use-after-free on disconnect",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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  "cveMetadata": {
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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"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-31581",
      "date": "2026-07-08",
      "epss": "0.00128",
      "percentile": "0.02805"
    },
    "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\"]}]}}"
  }
}


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Taxonomy of the tags.





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.