{"api_version":"1","generated_at":"2026-09-19T04:28:05+00:00","cve":"CVE-2026-90257","urls":{"html":"https://cve.report/CVE-2026-90257","api":"https://cve.report/api/cve/CVE-2026-90257.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-90257","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-90257"},"summary":{"title":"Bluetooth: virtio_bt: avoid OOB read of build info string","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: virtio_bt: avoid OOB read of build info string\n\nThe virtbt_setup_zephyr() sends the Zephyr vendor command 0xfc08 (Read\nBuild Information) and hands the response to bt_dev_info() and\nhci_set_fw_info() as a \"%s\" string starting at skb->data + 1, without\nchecking the length. A backend that answers with status only leaves that\npointer past the end of the received data, so the walk reads adjacent\nslab memory until it meets a NUL. Those bytes reach the kernel log and\nthe firmware-info debugfs file.\n\nTo fix this, print the string with a bounded \"%.*s\" limited to\nskb->len - 1. A short or unterminated response then prints as much as\narrived instead of failing setup.\n\nThis mirrors commit dd068ef04412 (\"Bluetooth: bpa10x: avoid OOB read of\nrevision string in bpa10x_setup()\"), which fixed the identical pattern.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-09-17 17:17:22","updated_at":"2026-09-17 17:17:22"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/502adc06ba76dee19c292ae4a07d74d202fe734d","name":"https://git.kernel.org/stable/c/502adc06ba76dee19c292ae4a07d74d202fe734d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/84ea9c99874804f5ca13f35bbc186ba93902f30f","name":"https://git.kernel.org/stable/c/84ea9c99874804f5ca13f35bbc186ba93902f30f","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0e388d805233a883a31271676eae6031dfc9e898","name":"https://git.kernel.org/stable/c/0e388d805233a883a31271676eae6031dfc9e898","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/be1e3df2c49c91b0a052c6563884e8d39bd768b2","name":"https://git.kernel.org/stable/c/be1e3df2c49c91b0a052c6563884e8d39bd768b2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/54e9387eb7546eaa6f600220599d55740956ffc3","name":"https://git.kernel.org/stable/c/54e9387eb7546eaa6f600220599d55740956ffc3","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/fb445b3466a8d1c7a0b0d0676fb475e3ce22d94e","name":"https://git.kernel.org/stable/c/fb445b3466a8d1c7a0b0d0676fb475e3ce22d94e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/d08c99abf06133a7829d46627e77e3315ca974d2","name":"https://git.kernel.org/stable/c/d08c99abf06133a7829d46627e77e3315ca974d2","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-90257","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-90257","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected afd2daa26c7abd734d78bd274fc6c59a15e61063 fb445b3466a8d1c7a0b0d0676fb475e3ce22d94e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected afd2daa26c7abd734d78bd274fc6c59a15e61063 d08c99abf06133a7829d46627e77e3315ca974d2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected afd2daa26c7abd734d78bd274fc6c59a15e61063 0e388d805233a883a31271676eae6031dfc9e898 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected afd2daa26c7abd734d78bd274fc6c59a15e61063 54e9387eb7546eaa6f600220599d55740956ffc3 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected afd2daa26c7abd734d78bd274fc6c59a15e61063 be1e3df2c49c91b0a052c6563884e8d39bd768b2 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected afd2daa26c7abd734d78bd274fc6c59a15e61063 84ea9c99874804f5ca13f35bbc186ba93902f30f git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected afd2daa26c7abd734d78bd274fc6c59a15e61063 502adc06ba76dee19c292ae4a07d74d202fe734d git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 5.13","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.13 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.221 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.188 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.157 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.110 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.52 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2.6 7.2.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.3-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["drivers/bluetooth/virtio_bt.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"fb445b3466a8d1c7a0b0d0676fb475e3ce22d94e","status":"affected","version":"afd2daa26c7abd734d78bd274fc6c59a15e61063","versionType":"git"},{"lessThan":"d08c99abf06133a7829d46627e77e3315ca974d2","status":"affected","version":"afd2daa26c7abd734d78bd274fc6c59a15e61063","versionType":"git"},{"lessThan":"0e388d805233a883a31271676eae6031dfc9e898","status":"affected","version":"afd2daa26c7abd734d78bd274fc6c59a15e61063","versionType":"git"},{"lessThan":"54e9387eb7546eaa6f600220599d55740956ffc3","status":"affected","version":"afd2daa26c7abd734d78bd274fc6c59a15e61063","versionType":"git"},{"lessThan":"be1e3df2c49c91b0a052c6563884e8d39bd768b2","status":"affected","version":"afd2daa26c7abd734d78bd274fc6c59a15e61063","versionType":"git"},{"lessThan":"84ea9c99874804f5ca13f35bbc186ba93902f30f","status":"affected","version":"afd2daa26c7abd734d78bd274fc6c59a15e61063","versionType":"git"},{"lessThan":"502adc06ba76dee19c292ae4a07d74d202fe734d","status":"affected","version":"afd2daa26c7abd734d78bd274fc6c59a15e61063","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["drivers/bluetooth/virtio_bt.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"5.13"},{"lessThan":"5.13","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.221","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.188","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.157","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.110","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.52","versionType":"semver"},{"lessThanOrEqual":"7.2.*","status":"unaffected","version":"7.2.6","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.3-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.221","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.188","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.157","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.110","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.52","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2.6","versionStartIncluding":"5.13","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.3-rc1","versionStartIncluding":"5.13","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: virtio_bt: avoid OOB read of build info string\n\nThe virtbt_setup_zephyr() sends the Zephyr vendor command 0xfc08 (Read\nBuild Information) and hands the response to bt_dev_info() and\nhci_set_fw_info() as a \"%s\" string starting at skb->data + 1, without\nchecking the length. A backend that answers with status only leaves that\npointer past the end of the received data, so the walk reads adjacent\nslab memory until it meets a NUL. Those bytes reach the kernel log and\nthe firmware-info debugfs file.\n\nTo fix this, print the string with a bounded \"%.*s\" limited to\nskb->len - 1. A short or unterminated response then prints as much as\narrived instead of failing setup.\n\nThis mirrors commit dd068ef04412 (\"Bluetooth: bpa10x: avoid OOB read of\nrevision string in bpa10x_setup()\"), which fixed the identical pattern."}],"providerMetadata":{"dateUpdated":"2026-09-17T16:07:56.089Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/fb445b3466a8d1c7a0b0d0676fb475e3ce22d94e"},{"url":"https://git.kernel.org/stable/c/d08c99abf06133a7829d46627e77e3315ca974d2"},{"url":"https://git.kernel.org/stable/c/0e388d805233a883a31271676eae6031dfc9e898"},{"url":"https://git.kernel.org/stable/c/54e9387eb7546eaa6f600220599d55740956ffc3"},{"url":"https://git.kernel.org/stable/c/be1e3df2c49c91b0a052c6563884e8d39bd768b2"},{"url":"https://git.kernel.org/stable/c/84ea9c99874804f5ca13f35bbc186ba93902f30f"},{"url":"https://git.kernel.org/stable/c/502adc06ba76dee19c292ae4a07d74d202fe734d"}],"title":"Bluetooth: virtio_bt: avoid OOB read of build info string","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-90257","datePublished":"2026-09-17T16:07:56.089Z","dateReserved":"2026-09-11T19:38:34.796Z","dateUpdated":"2026-09-17T16:07:56.089Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-09-17 17:17:22","lastModifiedDate":"2026-09-17 17:17:22","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"90257","Ordinal":"1","Title":"Bluetooth: virtio_bt: avoid OOB read of build info string","CVE":"CVE-2026-90257","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"90257","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nBluetooth: virtio_bt: avoid OOB read of build info string\n\nThe virtbt_setup_zephyr() sends the Zephyr vendor command 0xfc08 (Read\nBuild Information) and hands the response to bt_dev_info() and\nhci_set_fw_info() as a \"%s\" string starting at skb->data + 1, without\nchecking the length. A backend that answers with status only leaves that\npointer past the end of the received data, so the walk reads adjacent\nslab memory until it meets a NUL. Those bytes reach the kernel log and\nthe firmware-info debugfs file.\n\nTo fix this, print the string with a bounded \"%.*s\" limited to\nskb->len - 1. A short or unterminated response then prints as much as\narrived instead of failing setup.\n\nThis mirrors commit dd068ef04412 (\"Bluetooth: bpa10x: avoid OOB read of\nrevision string in bpa10x_setup()\"), which fixed the identical pattern.","Type":"Description","Title":"Bluetooth: virtio_bt: avoid OOB read of build info string"}]}}}