{"id":"CVE-2026-64549","state":"PUBLISHED","title":"Bluetooth: bpa10x: avoid OOB read of revision string in bpa10x_setup()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: bpa10x: avoid OOB read of revision string in bpa10x_setup()\n\nbpa10x_setup() sends the vendor command 0xfc0e and passes the response\nto bt_dev_info() and hci_set_fw_info() as a \"%s\" string starting at\nskb->data + 1, without checking the length:\n\n\tbt_dev_info(hdev, \"%s\", (char *)(skb->data + 1));\n\thci_set_fw_info(hdev, \"%s\", skb->data + 1);\n\nA device that returns a one-byte response (status only) leaves\nskb->data + 1 past the end of the data, and the %s walk reads adjacent\nslab memory until it meets a NUL. The same happens when the payload is\nnot NUL-terminated within skb->len. The out-of-bounds bytes end up in\nthe kernel log and the firmware-info debugfs file.\n\nPrint the revision string with a bounded \"%.*s\" limited to skb->len - 1\ninstead. This keeps the string readable for well-behaved devices while\nnever reading past the received data, and does not fail setup, so a\ndevice returning a short or unterminated response keeps working.","publishedAt":"2026-07-27T20:10:38.894Z","updatedAt":"2026-08-17T04:57:26.570Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ddd68ec8f4847b460c9f580076eafe13b031a6fd","status":"affected","lessThan":"1813add71e386f77b3040e6c8dc9b7b3ff965a6c","versionType":"git"},{"version":"ddd68ec8f4847b460c9f580076eafe13b031a6fd","status":"affected","lessThan":"bd56c23f1f8681a2857ee924a8bd3abf87c8913b","versionType":"git"},{"version":"ddd68ec8f4847b460c9f580076eafe13b031a6fd","status":"affected","lessThan":"7a64f39ebe1bacd9004a62eceadac0b122ec3cc2","versionType":"git"},{"version":"ddd68ec8f4847b460c9f580076eafe13b031a6fd","status":"affected","lessThan":"f80b4afe893dffa9fabdbf80fb4d6782b24a6793","versionType":"git"},{"version":"ddd68ec8f4847b460c9f580076eafe13b031a6fd","status":"affected","lessThan":"4b4008dda1d0c6e598d7865631ad4eda63a560f0","versionType":"git"},{"version":"ddd68ec8f4847b460c9f580076eafe13b031a6fd","status":"affected","lessThan":"bfc9e7be289df11e8e38c98cd78019d67fdd0bd5","versionType":"git"},{"version":"ddd68ec8f4847b460c9f580076eafe13b031a6fd","status":"affected","lessThan":"a8e169d308775039200bb9c905c7ce420db6e8c5","versionType":"git"},{"version":"ddd68ec8f4847b460c9f580076eafe13b031a6fd","status":"affected","lessThan":"dd068ef044128db655f48323a4acfd5907e04903","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/bluetooth/bpa10x.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.4","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","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/bpa10x.c"]}],"references":["https://git.kernel.org/stable/c/1813add71e386f77b3040e6c8dc9b7b3ff965a6c","https://git.kernel.org/stable/c/bd56c23f1f8681a2857ee924a8bd3abf87c8913b","https://git.kernel.org/stable/c/7a64f39ebe1bacd9004a62eceadac0b122ec3cc2","https://git.kernel.org/stable/c/f80b4afe893dffa9fabdbf80fb4d6782b24a6793","https://git.kernel.org/stable/c/4b4008dda1d0c6e598d7865631ad4eda63a560f0","https://git.kernel.org/stable/c/bfc9e7be289df11e8e38c98cd78019d67fdd0bd5","https://git.kernel.org/stable/c/a8e169d308775039200bb9c905c7ce420db6e8c5","https://git.kernel.org/stable/c/dd068ef044128db655f48323a4acfd5907e04903"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/64xxx/CVE-2026-64549.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-64549","state":"PUBLISHED","datePublished":"2026-07-27T20:10:38.894Z","dateUpdated":"2026-08-17T04:57:26.570Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-07-19T15:36:31.795Z"},"containers":{"cna":{"title":"Bluetooth: bpa10x: avoid OOB read of revision string in bpa10x_setup()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: bpa10x: avoid OOB read of revision string in bpa10x_setup()\n\nbpa10x_setup() sends the vendor command 0xfc0e and passes the response\nto bt_dev_info() and hci_set_fw_info() as a \"%s\" string starting at\nskb->data + 1, without checking the length:\n\n\tbt_dev_info(hdev, \"%s\", (char *)(skb->data + 1));\n\thci_set_fw_info(hdev, \"%s\", skb->data + 1);\n\nA device that returns a one-byte response (status only) leaves\nskb->data + 1 past the end of the data, and the %s walk reads adjacent\nslab memory until it meets a NUL. The same happens when the payload is\nnot NUL-terminated within skb->len. The out-of-bounds bytes end up in\nthe kernel log and the firmware-info debugfs file.\n\nPrint the revision string with a bounded \"%.*s\" limited to skb->len - 1\ninstead. This keeps the string readable for well-behaved devices while\nnever reading past the received data, and does not fail setup, so a\ndevice returning a short or unterminated response keeps working."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"ddd68ec8f4847b460c9f580076eafe13b031a6fd","status":"affected","lessThan":"1813add71e386f77b3040e6c8dc9b7b3ff965a6c","versionType":"git"},{"version":"ddd68ec8f4847b460c9f580076eafe13b031a6fd","status":"affected","lessThan":"bd56c23f1f8681a2857ee924a8bd3abf87c8913b","versionType":"git"},{"version":"ddd68ec8f4847b460c9f580076eafe13b031a6fd","status":"affected","lessThan":"7a64f39ebe1bacd9004a62eceadac0b122ec3cc2","versionType":"git"},{"version":"ddd68ec8f4847b460c9f580076eafe13b031a6fd","status":"affected","lessThan":"f80b4afe893dffa9fabdbf80fb4d6782b24a6793","versionType":"git"},{"version":"ddd68ec8f4847b460c9f580076eafe13b031a6fd","status":"affected","lessThan":"4b4008dda1d0c6e598d7865631ad4eda63a560f0","versionType":"git"},{"version":"ddd68ec8f4847b460c9f580076eafe13b031a6fd","status":"affected","lessThan":"bfc9e7be289df11e8e38c98cd78019d67fdd0bd5","versionType":"git"},{"version":"ddd68ec8f4847b460c9f580076eafe13b031a6fd","status":"affected","lessThan":"a8e169d308775039200bb9c905c7ce420db6e8c5","versionType":"git"},{"version":"ddd68ec8f4847b460c9f580076eafe13b031a6fd","status":"affected","lessThan":"dd068ef044128db655f48323a4acfd5907e04903","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/bluetooth/bpa10x.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.4","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.4","versionType":"semver"},{"version":"5.10.261","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.212","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.178","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.145","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.97","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.40","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.1.5","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/bpa10x.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/1813add71e386f77b3040e6c8dc9b7b3ff965a6c"},{"url":"https://git.kernel.org/stable/c/bd56c23f1f8681a2857ee924a8bd3abf87c8913b"},{"url":"https://git.kernel.org/stable/c/7a64f39ebe1bacd9004a62eceadac0b122ec3cc2"},{"url":"https://git.kernel.org/stable/c/f80b4afe893dffa9fabdbf80fb4d6782b24a6793"},{"url":"https://git.kernel.org/stable/c/4b4008dda1d0c6e598d7865631ad4eda63a560f0"},{"url":"https://git.kernel.org/stable/c/bfc9e7be289df11e8e38c98cd78019d67fdd0bd5"},{"url":"https://git.kernel.org/stable/c/a8e169d308775039200bb9c905c7ce420db6e8c5"},{"url":"https://git.kernel.org/stable/c/dd068ef044128db655f48323a4acfd5907e04903"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-08-17T04:57:26.570Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"5.10.261"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"5.15.212"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"6.1.178"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"6.6.145"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"6.12.97"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"6.18.40"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"7.1.5"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.4","versionEndExcluding":"7.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}