CVE-2026-99091 (GCVE-0-2026-99091)

Vulnerability from cvelistv5 – Published: 2026-10-26 14:52 – Updated: 2026-10-30 12:41
VLAI
Title
Bluetooth: MGMT: Fix status of pending commands flushed on power off
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: MGMT: Fix status of pending commands flushed on power off cmd_complete_rsp() receives a struct cmd_lookup and, for a pending command that has no cmd_complete callback, falls through to cmd_status_rsp(cmd, data). cmd_status_rsp() reads data as a u8 *, so the status sent comes from the first byte of match->sk's representation, not from match->mgmt_status. commit f53e1c9c726d ("Bluetooth: MGMT: Fix possible crash on mgmt_index_removed") changed the callers' data from &status to &match and updated the cmd_complete branch to match->mgmt_status, but left the fall-through passing data unchanged. In mgmt_index_removed() match->sk is NULL, so every such command is answered with status 0x00 (Success) instead of MGMT_STATUS_INVALID_INDEX. In __mgmt_power_off() it is NULL too, unless a Set Powered command was pending: then settings_rsp() has stored that command's socket in match->sk, and the byte sent comes from the socket pointer. Either way the status the caller set, MGMT_STATUS_NOT_POWERED (or MGMT_STATUS_INVALID_INDEX when the device is being unregistered), is lost. Pass the status the callers set. This was seen on a QCA9377 laptop: bluetoothd's Start Discovery, pending when the adapter was powered off, was answered with Command Status 0x00 and no parameters, and bluetoothd 5.72 crashed on the zero-length success. BlueZ master has since added the length check on that path ("adapter: Fix crash on short start discovery reply", BlueZ a734b06059cb), but userspace should still be told Not Powered, not Success. Tested on Ubuntu 7.0.0-31 with a virtual controller (hci_vhci): power off is held in HCI Write Scan Enable while a Start Discovery is submitted, and the flush answers it with status 0x00 before this change and 0x0f (Not Powered) after.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7033 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 19b40ca62607cef78369549d1af091f2fd558931 , < bbc485ee811a74fc1d4733d0a2b0eb5aeb271a08 (git)
Affected: 4883296505aa7e4863c6869b689afb6005633b23 , < 44ce36c5789ac84e65de1e98c32db9a5ac04ed47 (git)
Affected: f53e1c9c726d83092167f2226f32bd3b73f26c21 , < 7ed7e038b520cf0dfa12d61c2caddb95e2f6922d (git)
Affected: f53e1c9c726d83092167f2226f32bd3b73f26c21 , < ec227cddd13cd7ac9077d263a73473ac370a055d (git)
Affected: f53e1c9c726d83092167f2226f32bd3b73f26c21 , < 07976405a3c71253e50533ee7b7a8b0dc16ab6ba (git)
Affected: f53e1c9c726d83092167f2226f32bd3b73f26c21 , < 86ef0f58bdecdedb3a1240971c56d71b7e4ce3fc (git)
Affected: 0cc47233af35fb5f10b5e6a027cb4ccd480caf9a (git)
Affected: 8c3f7943a29145d8a2d8e24893762f7673323eae (git)
Affected: 6.1.120 , < 6.1.191 (semver)
Affected: 6.6.55 , < 6.6.160 (semver)
Affected: 6.10.14 , < 6.11 (semver)
Affected: 6.11.3 , < 6.12 (semver)
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Linux Linux Affected: 6.12
Unaffected: 0 , < 6.12 (semver)
Unaffected: 6.1.191 , ≤ 6.1.* (semver)
Unaffected: 6.6.160 , ≤ 6.6.* (semver)
Unaffected: 6.12.113 , ≤ 6.12.* (semver)
Unaffected: 6.18.57 , ≤ 6.18.* (semver)
Unaffected: 7.2.11 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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{
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          "product": "Linux",
          "programFiles": [
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: MGMT: Fix status of pending commands flushed on power off\n\ncmd_complete_rsp() receives a struct cmd_lookup and, for a pending\ncommand that has no cmd_complete callback, falls through to\ncmd_status_rsp(cmd, data). cmd_status_rsp() reads data as a u8 *, so\nthe status sent comes from the first byte of match-\u003esk\u0027s\nrepresentation, not from match-\u003emgmt_status.\n\ncommit f53e1c9c726d (\"Bluetooth: MGMT: Fix possible crash on\nmgmt_index_removed\") changed the callers\u0027 data from \u0026status to \u0026match\nand updated the cmd_complete branch to match-\u003emgmt_status, but left\nthe fall-through passing data unchanged.\n\nIn mgmt_index_removed() match-\u003esk is NULL, so every such command is\nanswered with status 0x00 (Success) instead of\nMGMT_STATUS_INVALID_INDEX. In __mgmt_power_off() it is NULL too,\nunless a Set Powered command was pending: then settings_rsp() has\nstored that command\u0027s socket in match-\u003esk, and the byte sent comes\nfrom the socket pointer. Either way the status the caller set,\nMGMT_STATUS_NOT_POWERED (or MGMT_STATUS_INVALID_INDEX when the device\nis being unregistered), is lost.\n\nPass the status the callers set.\n\nThis was seen on a QCA9377 laptop: bluetoothd\u0027s Start Discovery,\npending when the adapter was powered off, was answered with Command\nStatus 0x00 and no parameters, and bluetoothd 5.72 crashed on the\nzero-length success. BlueZ master has since added the length check\non that path (\"adapter: Fix crash on short start discovery reply\",\nBlueZ a734b06059cb), but userspace should still be told Not Powered,\nnot Success.\n\nTested on Ubuntu 7.0.0-31 with a virtual controller (hci_vhci):\npower off is held in HCI Write Scan Enable while a Start Discovery is\nsubmitted, and the flush answers it with status 0x00 before this\nchange and 0x0f (Not Powered) after."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-30T12:41:41.779Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
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          "url": "https://git.kernel.org/stable/c/bbc485ee811a74fc1d4733d0a2b0eb5aeb271a08"
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          "url": "https://git.kernel.org/stable/c/44ce36c5789ac84e65de1e98c32db9a5ac04ed47"
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          "url": "https://git.kernel.org/stable/c/7ed7e038b520cf0dfa12d61c2caddb95e2f6922d"
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          "url": "https://git.kernel.org/stable/c/ec227cddd13cd7ac9077d263a73473ac370a055d"
        },
        {
          "url": "https://git.kernel.org/stable/c/07976405a3c71253e50533ee7b7a8b0dc16ab6ba"
        },
        {
          "url": "https://git.kernel.org/stable/c/86ef0f58bdecdedb3a1240971c56d71b7e4ce3fc"
        }
      ],
      "title": "Bluetooth: MGMT: Fix status of pending commands flushed on power off",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
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    "cveId": "CVE-2026-99091",
    "datePublished": "2026-10-26T14:52:00.262Z",
    "dateReserved": "2026-09-25T10:25:14.390Z",
    "dateUpdated": "2026-10-30T12:41:41.779Z",
    "state": "PUBLISHED"
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      "product_status:under_investigation": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "Bluetooth: MGMT: Fix status of pending commands flushed on power off",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-99091.json",
      "version": "1"
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        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: MGMT: Fix status of pending commands flushed on power off\n\ncmd_complete_rsp() receives a struct cmd_lookup and, for a pending\ncommand that has no cmd_complete callback, falls through to\ncmd_status_rsp(cmd, data). cmd_status_rsp() reads data as a u8 *, so\nthe status sent comes from the first byte of match-\u003esk\u0027s\nrepresentation, not from match-\u003emgmt_status.\n\ncommit f53e1c9c726d (\"Bluetooth: MGMT: Fix possible crash on\nmgmt_index_removed\") changed the callers\u0027 data from \u0026status to \u0026match\nand updated the cmd_complete branch to match-\u003emgmt_status, but left\nthe fall-through passing data unchanged.\n\nIn mgmt_index_removed() match-\u003esk is NULL, so every such command is\nanswered with status 0x00 (Success) instead of\nMGMT_STATUS_INVALID_INDEX. In __mgmt_power_off() it is NULL too,\nunless a Set Powered command was pending: then settings_rsp() has\nstored that command\u0027s socket in match-\u003esk, and the byte sent comes\nfrom the socket pointer. Either way the status the caller set,\nMGMT_STATUS_NOT_POWERED (or MGMT_STATUS_INVALID_INDEX when the device\nis being unregistered), is lost.\n\nPass the status the callers set.\n\nThis was seen on a QCA9377 laptop: bluetoothd\u0027s Start Discovery,\npending when the adapter was powered off, was answered with Command\nStatus 0x00 and no parameters, and bluetoothd 5.72 crashed on the\nzero-length success. BlueZ master has since added the length check\non that path (\"adapter: Fix crash on short start discovery reply\",\nBlueZ a734b06059cb), but userspace should still be told Not Powered,\nnot Success.\n\nTested on Ubuntu 7.0.0-31 with a virtual controller (hci_vhci):\npower off is held in HCI Write Scan Enable while a Start Discovery is\nsubmitted, and the flush answers it with status 0x00 before this\nchange and 0x0f (Not Powered) after."
          }
        ],
        "id": "CVE-2026-99091",
        "lastModified": "2026-10-30T13:21:44.810",
        "metrics": {},
        "published": "2026-10-26T15:16:47.960",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/07976405a3c71253e50533ee7b7a8b0dc16ab6ba"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/44ce36c5789ac84e65de1e98c32db9a5ac04ed47"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/7ed7e038b520cf0dfa12d61c2caddb95e2f6922d"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/86ef0f58bdecdedb3a1240971c56d71b7e4ce3fc"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/bbc485ee811a74fc1d4733d0a2b0eb5aeb271a08"
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          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/ec227cddd13cd7ac9077d263a73473ac370a055d"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "suse_vex": {
      "aggregate_severity": "not set",
      "current_release_date": "2026-10-27T00:41:31Z",
      "cve": "CVE-2026-99091",
      "id": "CVE-2026-99091",
      "initial_release_date": "2026-10-27T00:41:31Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-99091",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/2026/cve-2026-99091.json",
      "version": "2"
    }
  }
}



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Tags
Taxonomy of the tags.




Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.

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

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

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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.