CVE-2026-64573 (GCVE-0-2026-64573)

Vulnerability from cvelistv5 – Published: 2026-08-05 08:08 – Updated: 2026-08-05 08:08
VLAI
Title
Bluetooth: qca: fix NVM tag length underflow in TLV parser
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: qca: fix NVM tag length underflow in TLV parser In the TLV_TYPE_NVM branch of qca_tlv_check_data() the tag loop bound is "while (idx < length - sizeof(struct tlv_type_nvm))". "length" is a signed int from the firmware TLV header and sizeof(struct tlv_type_nvm) is a size_t (12), so "length" is converted to size_t and any firmware-supplied "length" < 12 makes the subtraction wrap to a huge value. The loop body then reads a 12-byte struct tlv_type_nvm past the end of the short vmalloc'd firmware buffer (and the EDL_TAG_ID_* handlers can write past it). Rewrite the bound as "idx + sizeof(struct tlv_type_nvm) <= length"; both operands are non-negative, so it no longer underflows and a "length" too small for one record correctly skips the loop. BUG: KASAN: vmalloc-out-of-bounds in qca_download_firmware.isra.0 (drivers/bluetooth/btqca.c:421) Read of size 2 at addr ffffc900000e5004 by task kworker/u9:0/52 Workqueue: hci0 hci_power_on Call Trace: ... kasan_report (mm/kasan/report.c:595) qca_download_firmware.isra.0 (drivers/bluetooth/btqca.c:421 drivers/bluetooth/btqca.c:617) qca_uart_setup (drivers/bluetooth/btqca.c:948) qca_setup (drivers/bluetooth/hci_qca.c:2029) hci_uart_setup (drivers/bluetooth/hci_ldisc.c:438) hci_dev_open_sync (net/bluetooth/hci_sync.c:5227) hci_power_on (net/bluetooth/hci_core.c:920) process_one_work (kernel/workqueue.c:3322) worker_thread (kernel/workqueue.c:3486) kthread (kernel/kthread.c:436) ret_from_fork (arch/x86/kernel/process.c:158) ret_from_fork_asm (arch/x86/entry/entry_64.S:245)
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 427281f9498ed614f9aabc80e46ec077c487da6d , < 70354dbb5f72d9a76da7b031de3cbaf6c7d8fc24 (git)
Affected: 2e4edfa1e2bd821a317e7d006517dcf2f3fac68d , < 59fd2f075bca94f030c7c78e94878ea0803d7690 (git)
Affected: 2e4edfa1e2bd821a317e7d006517dcf2f3fac68d , < a087ed960fce54e9302796229e9d545bbc9bcd4a (git)
Affected: 2e4edfa1e2bd821a317e7d006517dcf2f3fac68d , < 4fcfb5b2c736785464ff9745f94c6726c5ee2d85 (git)
Affected: 2e4edfa1e2bd821a317e7d006517dcf2f3fac68d , < c90164ca0f7036942ba088eb7ea8d3f6c2352020 (git)
Affected: ed53949cc92e28aaa3463d246942bda1fbb7f307 (git)
Affected: 1caceadfb50432dbf6d808796cb6c34ebb6d662c (git)
Affected: 02f05ed44b71152d5e11d29be28aed91c0489b4e (git)
Affected: 6.6.31 , < 6.6.148 (semver)
Affected: 5.15.159 , < 5.16 (semver)
Affected: 6.1.91 , < 6.2 (semver)
Affected: 6.8.10 , < 6.9 (semver)
Create a notification for this product.
Linux Linux Affected: 6.9
Unaffected: 0 , < 6.9 (semver)
Unaffected: 6.6.148 , ≤ 6.6.* (semver)
Unaffected: 6.12.101 , ≤ 6.12.* (semver)
Unaffected: 6.18.42 , ≤ 6.18.* (semver)
Unaffected: 7.1.6 , ≤ 7.1.* (semver)
Unaffected: 7.2-rc4 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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{
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      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: qca: fix NVM tag length underflow in TLV parser\n\nIn the TLV_TYPE_NVM branch of qca_tlv_check_data() the tag loop bound is\n\"while (idx \u003c length - sizeof(struct tlv_type_nvm))\". \"length\" is a signed\nint from the firmware TLV header and sizeof(struct tlv_type_nvm) is a\nsize_t (12), so \"length\" is converted to size_t and any firmware-supplied\n\"length\" \u003c 12 makes the subtraction wrap to a huge value. The loop body\nthen reads a 12-byte struct tlv_type_nvm past the end of the short\nvmalloc\u0027d firmware buffer (and the EDL_TAG_ID_* handlers can write past it).\n\nRewrite the bound as \"idx + sizeof(struct tlv_type_nvm) \u003c= length\"; both\noperands are non-negative, so it no longer underflows and a \"length\" too\nsmall for one record correctly skips the loop.\n\n  BUG: KASAN: vmalloc-out-of-bounds in qca_download_firmware.isra.0 (drivers/bluetooth/btqca.c:421)\n  Read of size 2 at addr ffffc900000e5004 by task kworker/u9:0/52\n  Workqueue: hci0 hci_power_on\n  Call Trace:\n   ...\n   kasan_report (mm/kasan/report.c:595)\n   qca_download_firmware.isra.0 (drivers/bluetooth/btqca.c:421 drivers/bluetooth/btqca.c:617)\n   qca_uart_setup (drivers/bluetooth/btqca.c:948)\n   qca_setup (drivers/bluetooth/hci_qca.c:2029)\n   hci_uart_setup (drivers/bluetooth/hci_ldisc.c:438)\n   hci_dev_open_sync (net/bluetooth/hci_sync.c:5227)\n   hci_power_on (net/bluetooth/hci_core.c:920)\n   process_one_work (kernel/workqueue.c:3322)\n   worker_thread (kernel/workqueue.c:3486)\n   kthread (kernel/kthread.c:436)\n   ret_from_fork (arch/x86/kernel/process.c:158)\n   ret_from_fork_asm (arch/x86/entry/entry_64.S:245)"
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        "dateUpdated": "2026-08-05T08:08:09.669Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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          "url": "https://git.kernel.org/stable/c/70354dbb5f72d9a76da7b031de3cbaf6c7d8fc24"
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          "url": "https://git.kernel.org/stable/c/59fd2f075bca94f030c7c78e94878ea0803d7690"
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          "url": "https://git.kernel.org/stable/c/4fcfb5b2c736785464ff9745f94c6726c5ee2d85"
        },
        {
          "url": "https://git.kernel.org/stable/c/c90164ca0f7036942ba088eb7ea8d3f6c2352020"
        }
      ],
      "title": "Bluetooth: qca: fix NVM tag length underflow in TLV parser",
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-64573",
    "datePublished": "2026-08-05T08:08:09.669Z",
    "dateReserved": "2026-07-19T15:36:31.797Z",
    "dateUpdated": "2026-08-05T08:08:09.669Z",
    "state": "PUBLISHED"
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      "cve": "CVE-2026-64573",
      "date": "2026-08-07",
      "epss": "0.00156",
      "percentile": "0.05262"
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The loop body\\nthen reads a 12-byte struct tlv_type_nvm past the end of the short\\nvmalloc\u0027d firmware buffer (and the EDL_TAG_ID_* handlers can write past it).\\n\\nRewrite the bound as \\\"idx + sizeof(struct tlv_type_nvm) \u003c= length\\\"; both\\noperands are non-negative, so it no longer underflows and a \\\"length\\\" too\\nsmall for one record correctly skips the loop.\\n\\n  BUG: KASAN: vmalloc-out-of-bounds in qca_download_firmware.isra.0 (drivers/bluetooth/btqca.c:421)\\n  Read of size 2 at addr ffffc900000e5004 by task kworker/u9:0/52\\n  Workqueue: hci0 hci_power_on\\n  Call Trace:\\n   ...\\n   kasan_report (mm/kasan/report.c:595)\\n   qca_download_firmware.isra.0 (drivers/bluetooth/btqca.c:421 drivers/bluetooth/btqca.c:617)\\n   qca_uart_setup (drivers/bluetooth/btqca.c:948)\\n   qca_setup (drivers/bluetooth/hci_qca.c:2029)\\n   hci_uart_setup (drivers/bluetooth/hci_ldisc.c:438)\\n   hci_dev_open_sync (net/bluetooth/hci_sync.c:5227)\\n   hci_power_on (net/bluetooth/hci_core.c:920)\\n   process_one_work (kernel/workqueue.c:3322)\\n   worker_thread (kernel/workqueue.c:3486)\\n   kthread (kernel/kthread.c:436)\\n   ret_from_fork (arch/x86/kernel/process.c:158)\\n   ret_from_fork_asm (arch/x86/entry/entry_64.S:245)\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/bluetooth/btqca.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"427281f9498ed614f9aabc80e46ec077c487da6d\",\"lessThan\":\"70354dbb5f72d9a76da7b031de3cbaf6c7d8fc24\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2e4edfa1e2bd821a317e7d006517dcf2f3fac68d\",\"lessThan\":\"59fd2f075bca94f030c7c78e94878ea0803d7690\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2e4edfa1e2bd821a317e7d006517dcf2f3fac68d\",\"lessThan\":\"a087ed960fce54e9302796229e9d545bbc9bcd4a\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2e4edfa1e2bd821a317e7d006517dcf2f3fac68d\",\"lessThan\":\"4fcfb5b2c736785464ff9745f94c6726c5ee2d85\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"2e4edfa1e2bd821a317e7d006517dcf2f3fac68d\",\"lessThan\":\"c90164ca0f7036942ba088eb7ea8d3f6c2352020\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"ed53949cc92e28aaa3463d246942bda1fbb7f307\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"1caceadfb50432dbf6d808796cb6c34ebb6d662c\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"02f05ed44b71152d5e11d29be28aed91c0489b4e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"6.6.31\",\"lessThan\":\"6.6.148\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.15.159\",\"lessThan\":\"5.16\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.1.91\",\"lessThan\":\"6.2\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"6.8.10\",\"lessThan\":\"6.9\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/bluetooth/btqca.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.9\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.9\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.148\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.101\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.42\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.6\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2-rc4\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/4fcfb5b2c736785464ff9745f94c6726c5ee2d85\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/59fd2f075bca94f030c7c78e94878ea0803d7690\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/70354dbb5f72d9a76da7b031de3cbaf6c7d8fc24\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/a087ed960fce54e9302796229e9d545bbc9bcd4a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c90164ca0f7036942ba088eb7ea8d3f6c2352020\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-06T12:41:26+00:00",
      "cve": "CVE-2026-64573",
      "id": "CVE-2026-64573",
      "initial_release_date": "2026-08-05T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: Bluetooth: qca: fix NVM tag length underflow in TLV parser",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-64573.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-06T23:56:20Z",
      "cve": "CVE-2026-64573",
      "id": "CVE-2026-64573",
      "initial_release_date": "2026-08-06T01:06:23Z",
      "product_status:known_affected": "127",
      "product_status:known_not_affected": "169",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-64573",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-64573.json",
      "version": "3"
    }
  }
}



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