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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: ccp: Don\u0027t attempt to copy ID to userspace if PSP command failed\n\nWhen retrieving the ID for the CPU, don\u0027t attempt to copy the ID blob to\nuserspace if the firmware command failed.  If the failure was due to an\ninvalid length, i.e. the userspace buffer+length was too small, copying\nthe number of bytes _firmware_ requires will overflow the kernel-allocated\nbuffer and leak data to userspace.\n\n  BUG: KASAN: slab-out-of-bounds in instrument_copy_to_user ../include/linux/instrumented.h:129 [inline]\n  BUG: KASAN: slab-out-of-bounds in _inline_copy_to_user ../include/linux/uaccess.h:205 [inline]\n  BUG: KASAN: slab-out-of-bounds in _copy_to_user+0x66/0xa0 ../lib/usercopy.c:26\n  Read of size 64 at addr ffff8881867f5960 by task syz.0.906/24388\n\n  CPU: 130 UID: 0 PID: 24388 Comm: syz.0.906 Tainted: G     U     O        7.0.0-smp-DEV #28 PREEMPTLAZY\n  Tainted: [U]=USER, [O]=OOT_MODULE\n  Hardware name: Google, Inc. Arcadia_IT_80/Arcadia_IT_80, BIOS 12.62.0-0 11/19/2025\n  Call Trace:\n   \u003cTASK\u003e\n   dump_stack_lvl+0xc5/0x110 ../lib/dump_stack.c:120\n   print_address_description ../mm/kasan/report.c:378 [inline]\n   print_report+0xbc/0x260 ../mm/kasan/report.c:482\n   kasan_report+0xa2/0xe0 ../mm/kasan/report.c:595\n   check_region_inline ../mm/kasan/generic.c:-1 [inline]\n   kasan_check_range+0x264/0x2c0 ../mm/kasan/generic.c:200\n   instrument_copy_to_user ../include/linux/instrumented.h:129 [inline]\n   _inline_copy_to_user ../include/linux/uaccess.h:205 [inline]\n   _copy_to_user+0x66/0xa0 ../lib/usercopy.c:26\n   copy_to_user ../include/linux/uaccess.h:236 [inline]\n   sev_ioctl_do_get_id2+0x361/0x490 ../drivers/crypto/ccp/sev-dev.c:2222\n   sev_ioctl+0x25f/0x490 ../drivers/crypto/ccp/sev-dev.c:2575\n   vfs_ioctl ../fs/ioctl.c:51 [inline]\n   __do_sys_ioctl ../fs/ioctl.c:597 [inline]\n   __se_sys_ioctl+0x11d/0x1b0 ../fs/ioctl.c:583\n   do_syscall_x64 ../arch/x86/entry/syscall_64.c:63 [inline]\n   do_syscall_64+0xe0/0x800 ../arch/x86/entry/syscall_64.c:94\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\n   \u003c/TASK\u003e\n\nWARN if the driver says the command succeeded, but the firmware error code\nsays otherwise, as __sev_do_cmd_locked() is expected to return -EIO on any\nfirwmware error."
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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      "title": "crypto: ccp: Don\u0027t attempt to copy ID to userspace if PSP command failed",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: ccp: Don\u0027t attempt to copy PDH cert to userspace if PSP command failed\n\nWhen retrieving the PDH cert, don\u0027t attempt to copy the blobs to userspace\nif the firmware command failed.  If the failure was due to an invalid\nlength, i.e. the userspace buffer+length was too small, copying the number\nof bytes _firmware_ requires will overflow the kernel-allocated buffer and\nleak data to userspace.\n\n  BUG: KASAN: slab-out-of-bounds in instrument_copy_to_user ../include/linux/instrumented.h:129 [inline]\n  BUG: KASAN: slab-out-of-bounds in _inline_copy_to_user ../include/linux/uaccess.h:205 [inline]\n  BUG: KASAN: slab-out-of-bounds in _copy_to_user+0x66/0xa0 ../lib/usercopy.c:26\n  Read of size 2084 at addr ffff8885c4ab8aa0 by task syz.0.186/21033\n\n  CPU: 51 UID: 0 PID: 21033 Comm: syz.0.186 Tainted: G     U     O        7.0.0-smp-DEV #28 PREEMPTLAZY\n  Tainted: [U]=USER, [O]=OOT_MODULE\n  Hardware name: Google, Inc.                                                       Arcadia_IT_80/Arcadia_IT_80, BIOS 34.84.12-0 11/17/2025\n  Call Trace:\n   \u003cTASK\u003e\n   dump_stack_lvl+0xc5/0x110 ../lib/dump_stack.c:120\n   print_address_description ../mm/kasan/report.c:378 [inline]\n   print_report+0xbc/0x260 ../mm/kasan/report.c:482\n   kasan_report+0xa2/0xe0 ../mm/kasan/report.c:595\n   check_region_inline ../mm/kasan/generic.c:-1 [inline]\n   kasan_check_range+0x264/0x2c0 ../mm/kasan/generic.c:200\n   instrument_copy_to_user ../include/linux/instrumented.h:129 [inline]\n   _inline_copy_to_user ../include/linux/uaccess.h:205 [inline]\n   _copy_to_user+0x66/0xa0 ../lib/usercopy.c:26\n   copy_to_user ../include/linux/uaccess.h:236 [inline]\n   sev_ioctl_do_pdh_export+0x3d3/0x7c0 ../drivers/crypto/ccp/sev-dev.c:2347\n   sev_ioctl+0x2a2/0x490 ../drivers/crypto/ccp/sev-dev.c:2568\n   vfs_ioctl ../fs/ioctl.c:51 [inline]\n   __do_sys_ioctl ../fs/ioctl.c:597 [inline]\n   __se_sys_ioctl+0x11d/0x1b0 ../fs/ioctl.c:583\n   do_syscall_x64 ../arch/x86/entry/syscall_64.c:63 [inline]\n   do_syscall_64+0xe0/0x800 ../arch/x86/entry/syscall_64.c:94\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\n   \u003c/TASK\u003e\n\nWARN if the driver says the command succeeded, but the firmware error code\nsays otherwise, as __sev_do_cmd_locked() is expected to return -EIO on any\nfirwmware error."
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          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncrypto: ccp: Don\u0027t attempt to copy CSR to userspace if PSP command failed\n\nWhen retrieving the PEK CSR, don\u0027t attempt to copy the blob to userspace\nif the firmware command failed.  If the failure was due to an invalid\nlength, i.e. the userspace buffer+length was too small, copying the number\nof bytes _firmware_ requires will overflow the kernel-allocated buffer and\nleak data to userspace.\n\n  BUG: KASAN: slab-out-of-bounds in instrument_copy_to_user ../include/linux/instrumented.h:129 [inline]\n  BUG: KASAN: slab-out-of-bounds in _inline_copy_to_user ../include/linux/uaccess.h:205 [inline]\n  BUG: KASAN: slab-out-of-bounds in _copy_to_user+0x66/0xa0 ../lib/usercopy.c:26\n  Read of size 2084 at addr ffff898144612e20 by task syz.9.219/21405\n\n  CPU: 14 UID: 0 PID: 21405 Comm: syz.9.219 Tainted: G     U     O        7.0.0-smp-DEV #28 PREEMPTLAZY\n  Tainted: [U]=USER, [O]=OOT_MODULE\n  Hardware name: Google, Inc. Arcadia_IT_80/Arcadia_IT_80, BIOS 12.62.0-0 11/19/2025\n  Call Trace:\n   \u003cTASK\u003e\n   dump_stack_lvl+0xc5/0x110 ../lib/dump_stack.c:120\n   print_address_description ../mm/kasan/report.c:378 [inline]\n   print_report+0xbc/0x260 ../mm/kasan/report.c:482\n   kasan_report+0xa2/0xe0 ../mm/kasan/report.c:595\n   check_region_inline ../mm/kasan/generic.c:-1 [inline]\n   kasan_check_range+0x264/0x2c0 ../mm/kasan/generic.c:200\n   instrument_copy_to_user ../include/linux/instrumented.h:129 [inline]\n   _inline_copy_to_user ../include/linux/uaccess.h:205 [inline]\n   _copy_to_user+0x66/0xa0 ../lib/usercopy.c:26\n   copy_to_user ../include/linux/uaccess.h:236 [inline]\n   sev_ioctl_do_pek_csr+0x31f/0x590 ../drivers/crypto/ccp/sev-dev.c:1872\n   sev_ioctl+0x3a4/0x490 ../drivers/crypto/ccp/sev-dev.c:2562\n   vfs_ioctl ../fs/ioctl.c:51 [inline]\n   __do_sys_ioctl ../fs/ioctl.c:597 [inline]\n   __se_sys_ioctl+0x11d/0x1b0 ../fs/ioctl.c:583\n   do_syscall_x64 ../arch/x86/entry/syscall_64.c:63 [inline]\n   do_syscall_64+0xe0/0x800 ../arch/x86/entry/syscall_64.c:94\n   entry_SYSCALL_64_after_hwframe+0x76/0x7e\n   \u003c/TASK\u003e\n\nWARN if the driver says the command succeeded, but the firmware error code\nsays otherwise, as __sev_do_cmd_locked() is expected to return -EIO on any\nfirwmware error."
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            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
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              "value": "AV:L - The vulnerable code is reached through a local `ioctl(SEV_ISSUE_CMD)` on the `/dev/sev` misc character device with the `SEV_PEK_CSR` subcommand, not through a network or adjacent interface.\nAC:L - An attacker who can issue the ioctl can reliably trigger the bug by providing a CSR buffer length that is too small, causing firmware to return the required larger length. No race or condition outside the attacker\u0027s control is required.\nPR:L - The path requires write access to `/dev/sev`; the driver does not enforce a capability check, and reasonable SEV management deployments may delegate writable device access to non-root service or management accounts. Under the required higher-severity rule, this is scored as low privileges rather than root-only.\nUI:N - The attacker directly opens the device and issues the ioctl. No separate victim action is required.\nS:U - The bug affects kernel memory from a local kernel device interface within the same host security scope. It is not a VM escape, IOMMU bypass, or cross-authority boundary change.\nC:H - The old code copied the firmware-reported required CSR length from a smaller `kzalloc()` buffer, producing a slab out-of-bounds read into userspace. This can leak adjacent kernel heap data and is not limited to only a few bytes.\nI:N - The vulnerability is an out-of-bounds read during `copy_to_user()`, with no kernel memory write or direct control-flow corruption. It does not directly provide an integrity impact.\nA:H - The out-of-bounds usercopy is shown to trigger a KASAN slab-out-of-bounds BUG, and hardened/debug configurations can turn the invalid exposure into an oops or panic. It can be triggered repeatedly by issuing the ioctl again."
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: hci_event: move wake reason storage into validated event handlers\n\nhci_store_wake_reason() is called from hci_event_packet() immediately\nafter stripping the HCI event header but before hci_event_func()\nenforces the per-event minimum payload length from hci_ev_table.\nThis means a short HCI event frame can reach bacpy() before any bounds\ncheck runs.\n\nRather than duplicating skb parsing and per-event length checks inside\nhci_store_wake_reason(), move wake-address storage into the individual\nevent handlers after their existing event-length validation has\nsucceeded. Convert hci_store_wake_reason() into a small helper that only\nstores an already-validated bdaddr while the caller holds hci_dev_lock().\nUse the same helper after hci_event_func() with a NULL address to\npreserve the existing unexpected-wake fallback semantics when no\nvalidated event handler records a wake address.\n\nAnnotate the helper with __must_hold(\u0026hdev-\u003elock) and add\nlockdep_assert_held(\u0026hdev-\u003elock) so future call paths keep the lock\ncontract explicit.\n\nCall the helper from hci_conn_request_evt(), hci_conn_complete_evt(),\nhci_sync_conn_complete_evt(), le_conn_complete_evt(),\nhci_le_adv_report_evt(), hci_le_ext_adv_report_evt(),\nhci_le_direct_adv_report_evt(), hci_le_pa_sync_established_evt(), and\nhci_le_past_received_evt()."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 8.1,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:A - The vulnerable parser is in Bluetooth HCI event handling, reached from controller events generated by nearby Bluetooth activity such as connection or advertising wake events. Bluetooth attacks require radio adjacency rather than IP network reachability.\nAC:L - No race is required; a short HCI event reaches wake-reason parsing before the normal per-event length checks. The suspended/wake-reason state is a normal Bluetooth remote-wake deployment condition, so under the higher-severity rule this is low complexity.\nPR:N - An adjacent Bluetooth peer does not need privileges on the vulnerable host, and affected events can occur before any Bluetooth authentication or pairing decision in the host stack. Local HCI injection paths may require privileges, but the adjacent radio scenario requires none.\nUI:N - No victim action is required once Bluetooth remote wake/scanning is enabled and the system is in the affected state. The attacker only needs to deliver the triggering Bluetooth activity/event.\nS:U - The impact remains within the same kernel/host security authority. This is not a VM escape, IOMMU bypass, or cross-scope boundary violation.\nC:H - The bug is an out-of-bounds kernel heap read from an skb before validation, copied into wake-address state that is later reported through management resume events. Although each copy is small, repeated malformed wake events and multiple event layouts make kernel memory disclosure plausible, so the higher severity option is selected.\nI:N - The vulnerable operation copies out-of-bounds source bytes into intended hci_dev wake-reason fields, but does not provide an out-of-bounds write or control over unrelated kernel memory. I found no path from this state corruption to arbitrary modification or code execution.\nA:H - The malformed short event can drive invalid kernel memory reads before bounds checks; depending on allocator layout or hardening, this can cause an oops/panic. As a kernel fault from attacker-supplied malformed Bluetooth input is plausible, availability impact is high."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:25:03.550Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/86c8d07a64d553c41e213b52650020010f9ef23e"
        },
        {
          "url": "https://git.kernel.org/stable/c/2b2bf47cd75518c36fa2d41380e4a40641cc89cd"
        }
      ],
      "title": "Bluetooth: hci_event: move wake reason storage into validated event handlers",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-31771",
    "datePublished": "2026-05-01T14:14:59.918Z",
    "dateReserved": "2026-03-09T15:48:24.140Z",
    "dateUpdated": "2026-08-05T12:25:03.550Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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{
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    "cna": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "net/bluetooth/sco.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "dabf22269242e2f2bf44c43fcdc2fa763df7f9cc",
              "status": "affected",
              "version": "70a13b1e25fef37c87c8a1228ddb8900efbca7cf",
              "versionType": "git"
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            {
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              "version": "6.1.109",
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          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.3"
            },
            {
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              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
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              "status": "unaffected",
              "version": "6.1.168",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.134",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.81",
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              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.22",
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            },
            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.12",
              "versionType": "semver"
            },
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              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
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                  "vulnerable": true
                },
                {
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                  "versionEndExcluding": "7.0",
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: SCO: fix race conditions in sco_sock_connect()\n\nsco_sock_connect() checks sk_state and sk_type without holding\nthe socket lock. Two concurrent connect() syscalls on the same\nsocket can both pass the check and enter sco_connect(), leading\nto use-after-free.\n\nThe buggy scenario involves three participants and was confirmed\nwith additional logging instrumentation:\n\n  Thread A (connect):    HCI disconnect:      Thread B (connect):\n\n  sco_sock_connect(sk)                        sco_sock_connect(sk)\n  sk_state==BT_OPEN                           sk_state==BT_OPEN\n  (pass, no lock)                             (pass, no lock)\n  sco_connect(sk):                            sco_connect(sk):\n    hci_dev_lock                                hci_dev_lock\n    hci_connect_sco                               \u003c- blocked\n      -\u003e hcon1\n    sco_conn_add-\u003econn1\n    lock_sock(sk)\n    sco_chan_add:\n      conn1-\u003esk = sk\n      sk-\u003econn = conn1\n    sk_state=BT_CONNECT\n    release_sock\n    hci_dev_unlock\n                           hci_dev_lock\n                           sco_conn_del:\n                             lock_sock(sk)\n                             sco_chan_del:\n                               sk-\u003econn=NULL\n                               conn1-\u003esk=NULL\n                               sk_state=\n                                 BT_CLOSED\n                               SOCK_ZAPPED\n                             release_sock\n                           hci_dev_unlock\n                                                  (unblocked)\n                                                  hci_connect_sco\n                                                    -\u003e hcon2\n                                                  sco_conn_add\n                                                    -\u003e conn2\n                                                  lock_sock(sk)\n                                                  sco_chan_add:\n                                                    sk-\u003econn=conn2\n                                                  sk_state=\n                                                    BT_CONNECT\n                                                  // zombie sk!\n                                                  release_sock\n                                                  hci_dev_unlock\n\nThread B revives a BT_CLOSED + SOCK_ZAPPED socket back to\nBT_CONNECT. Subsequent cleanup triggers double sock_put() and\nuse-after-free. Meanwhile conn1 is leaked as it was orphaned\nwhen sco_conn_del() cleared the association.\n\nFix this by:\n- Moving lock_sock() before the sk_state/sk_type checks in\n  sco_sock_connect() to serialize concurrent connect attempts\n- Fixing the sk_type != SOCK_SEQPACKET check to actually\n  return the error instead of just assigning it\n- Adding a state re-check in sco_connect() after lock_sock()\n  to catch state changes during the window between the locks\n- Adding sco_pi(sk)-\u003econn check in sco_chan_add() to prevent\n  double-attach of a socket to multiple connections\n- Adding hci_conn_drop() on sco_chan_add failure to prevent\n  HCI connection leaks"
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The vulnerable code is reached through the local connect() syscall on an AF_BLUETOOTH/SCO socket. A Bluetooth peer or HCI disconnect can influence timing, but an adjacent attacker alone cannot race two connect() calls on the same local socket.\nAC:L - The attacker can create the race by issuing concurrent connect() syscalls on the same socket and repeating attempts while the normal HCI failure/disconnect path runs. Under the higher-severity rule, this attacker-controlled race is Low complexity.\nPR:L - SCO socket creation and connect do not impose a capability check, though AF_BLUETOOTH is limited to init_net rather than unprivileged network namespaces. A basic unprivileged local user on the host can open and race BTPROTO_SCO sockets.\nUI:N - No victim action is required once the attacker can run local code. The attacker directly invokes socket/connect operations and can repeat the race.\nS:U - The bug corrupts kernel Bluetooth socket/connection state within the same kernel security authority. It is a standard local kernel compromise/DoS path, not a VM escape or cross-scope boundary bypass.\nC:H - The race leads to a use-after-free/double sock_put on kernel socket objects. Kernel UAFs are defensibly scored as high confidentiality impact because freed objects can be reused for information disclosure primitives.\nI:H - The same UAF/double-free condition can be leveraged through heap reuse and spraying to corrupt kernel objects or control flow. Under the required guidance, UAF memory corruption is High integrity impact.\nA:H - Even without full exploitation, the double sock_put/use-after-free can crash or destabilize the kernel. Kernel crashes and UAF-triggered oops/panic conditions are High availability impact."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:25:19.630Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/dabf22269242e2f2bf44c43fcdc2fa763df7f9cc"
        },
        {
          "url": "https://git.kernel.org/stable/c/adb90cd0f9f7a8d438fcb93354040fbafc5ae2a0"
        },
        {
          "url": "https://git.kernel.org/stable/c/7e296ffdab5bdab718dff7c14288fdcb9154fa27"
        },
        {
          "url": "https://git.kernel.org/stable/c/98c8d3bfdaa657d8f472dbbebd7ea8cd816d8a8d"
        },
        {
          "url": "https://git.kernel.org/stable/c/d002bd11024bd231bcb606877e33951ffb7bed14"
        },
        {
          "url": "https://git.kernel.org/stable/c/8a5b0135d4a5d9683203a3d9a12a711ccec5936b"
        }
      ],
      "title": "Bluetooth: SCO: fix race conditions in sco_sock_connect()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-43023",
    "datePublished": "2026-05-01T14:15:25.736Z",
    "dateReserved": "2026-05-01T14:12:55.975Z",
    "dateUpdated": "2026-08-05T12:25:19.630Z",
    "state": "PUBLISHED"
  },
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}