{"id":"CVE-2026-64573","state":"PUBLISHED","title":"Bluetooth: qca: fix NVM tag length underflow in TLV parser","description":"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 < 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\" < 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'd firmware buffer (and the EDL_TAG_ID_* handlers can write past it).\n\nRewrite the bound as \"idx + sizeof(struct tlv_type_nvm) <= 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)","publishedAt":"2026-08-05T08:08:09.669Z","updatedAt":"2026-08-19T16:28:52.002Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ed53949cc92e28aaa3463d246942bda1fbb7f307","status":"affected","lessThan":"a7ee11441d71ab036a705d110a415421f5a4a898","versionType":"git"},{"version":"1caceadfb50432dbf6d808796cb6c34ebb6d662c","status":"affected","lessThan":"5d34e537755d2f9eba2d4e54d70126f987ef20b4","versionType":"git"},{"version":"427281f9498ed614f9aabc80e46ec077c487da6d","status":"affected","lessThan":"70354dbb5f72d9a76da7b031de3cbaf6c7d8fc24","versionType":"git"},{"version":"2e4edfa1e2bd821a317e7d006517dcf2f3fac68d","status":"affected","lessThan":"59fd2f075bca94f030c7c78e94878ea0803d7690","versionType":"git"},{"version":"2e4edfa1e2bd821a317e7d006517dcf2f3fac68d","status":"affected","lessThan":"a087ed960fce54e9302796229e9d545bbc9bcd4a","versionType":"git"},{"version":"2e4edfa1e2bd821a317e7d006517dcf2f3fac68d","status":"affected","lessThan":"4fcfb5b2c736785464ff9745f94c6726c5ee2d85","versionType":"git"},{"version":"2e4edfa1e2bd821a317e7d006517dcf2f3fac68d","status":"affected","lessThan":"c90164ca0f7036942ba088eb7ea8d3f6c2352020","versionType":"git"},{"version":"02f05ed44b71152d5e11d29be28aed91c0489b4e","status":"affected","versionType":"git"},{"version":"5.15.159","status":"affected","lessThan":"5.15.216","versionType":"semver"},{"version":"6.1.91","status":"affected","lessThan":"6.1.183","versionType":"semver"},{"version":"6.6.31","status":"affected","lessThan":"6.6.148","versionType":"semver"},{"version":"6.8.10","status":"affected","lessThan":"6.9","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/bluetooth/btqca.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.9","versionType":"semver"},{"version":"5.15.216","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.148","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.101","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/bluetooth/btqca.c"]}],"references":["https://git.kernel.org/stable/c/a7ee11441d71ab036a705d110a415421f5a4a898","https://git.kernel.org/stable/c/5d34e537755d2f9eba2d4e54d70126f987ef20b4","https://git.kernel.org/stable/c/70354dbb5f72d9a76da7b031de3cbaf6c7d8fc24","https://git.kernel.org/stable/c/59fd2f075bca94f030c7c78e94878ea0803d7690","https://git.kernel.org/stable/c/a087ed960fce54e9302796229e9d545bbc9bcd4a","https://git.kernel.org/stable/c/4fcfb5b2c736785464ff9745f94c6726c5ee2d85","https://git.kernel.org/stable/c/c90164ca0f7036942ba088eb7ea8d3f6c2352020"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64573.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64573","state":"PUBLISHED","datePublished":"2026-08-05T08:08:09.669Z","dateUpdated":"2026-08-19T16:28:52.002Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.797Z"},"containers":{"cna":{"title":"Bluetooth: qca: fix NVM tag length underflow in TLV parser","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 < 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\" < 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'd firmware buffer (and the EDL_TAG_ID_* handlers can write past it).\n\nRewrite the bound as \"idx + sizeof(struct tlv_type_nvm) <= 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":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ed53949cc92e28aaa3463d246942bda1fbb7f307","status":"affected","lessThan":"a7ee11441d71ab036a705d110a415421f5a4a898","versionType":"git"},{"version":"1caceadfb50432dbf6d808796cb6c34ebb6d662c","status":"affected","lessThan":"5d34e537755d2f9eba2d4e54d70126f987ef20b4","versionType":"git"},{"version":"427281f9498ed614f9aabc80e46ec077c487da6d","status":"affected","lessThan":"70354dbb5f72d9a76da7b031de3cbaf6c7d8fc24","versionType":"git"},{"version":"2e4edfa1e2bd821a317e7d006517dcf2f3fac68d","status":"affected","lessThan":"59fd2f075bca94f030c7c78e94878ea0803d7690","versionType":"git"},{"version":"2e4edfa1e2bd821a317e7d006517dcf2f3fac68d","status":"affected","lessThan":"a087ed960fce54e9302796229e9d545bbc9bcd4a","versionType":"git"},{"version":"2e4edfa1e2bd821a317e7d006517dcf2f3fac68d","status":"affected","lessThan":"4fcfb5b2c736785464ff9745f94c6726c5ee2d85","versionType":"git"},{"version":"2e4edfa1e2bd821a317e7d006517dcf2f3fac68d","status":"affected","lessThan":"c90164ca0f7036942ba088eb7ea8d3f6c2352020","versionType":"git"},{"version":"02f05ed44b71152d5e11d29be28aed91c0489b4e","status":"affected","versionType":"git"},{"version":"5.15.159","status":"affected","lessThan":"5.15.216","versionType":"semver"},{"version":"6.1.91","status":"affected","lessThan":"6.1.183","versionType":"semver"},{"version":"6.6.31","status":"affected","lessThan":"6.6.148","versionType":"semver"},{"version":"6.8.10","status":"affected","lessThan":"6.9","versionType":"semver"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/bluetooth/btqca.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.9","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.9","versionType":"semver"},{"version":"5.15.216","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.183","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.148","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.101","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.42","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.6","status":"unaffected","lessThanOrEqual":"7.1.*","versionType":"semver"},{"version":"7.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/bluetooth/btqca.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/a7ee11441d71ab036a705d110a415421f5a4a898"},{"url":"https://git.kernel.org/stable/c/5d34e537755d2f9eba2d4e54d70126f987ef20b4"},{"url":"https://git.kernel.org/stable/c/70354dbb5f72d9a76da7b031de3cbaf6c7d8fc24"},{"url":"https://git.kernel.org/stable/c/59fd2f075bca94f030c7c78e94878ea0803d7690"},{"url":"https://git.kernel.org/stable/c/a087ed960fce54e9302796229e9d545bbc9bcd4a"},{"url":"https://git.kernel.org/stable/c/4fcfb5b2c736785464ff9745f94c6726c5ee2d85"},{"url":"https://git.kernel.org/stable/c/c90164ca0f7036942ba088eb7ea8d3f6c2352020"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-19T16:28:52.002Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15.159","versionEndExcluding":"5.15.216"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.1.91","versionEndExcluding":"6.1.183"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.6.31","versionEndExcluding":"6.6.148"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.12.101"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"6.18.42"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"7.1.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.9","versionEndExcluding":"7.2"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.8.10"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}