{"id":"CVE-2026-90257","title":"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 respo…","summary":"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 respo…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= afd2daa26c7abd734d78bd274fc6c59a15e61063 < fb445b3466a8d1c7a0b0d0676fb475e3ce22d94e","Linux >= afd2daa26c7abd734d78bd274fc6c59a15e61063 < d08c99abf06133a7829d46627e77e3315ca974d2","Linux >= afd2daa26c7abd734d78bd274fc6c59a15e61063 < 0e388d805233a883a31271676eae6031dfc9e898","Linux >= afd2daa26c7abd734d78bd274fc6c59a15e61063 < 54e9387eb7546eaa6f600220599d55740956ffc3","Linux >= afd2daa26c7abd734d78bd274fc6c59a15e61063 < be1e3df2c49c91b0a052c6563884e8d39bd768b2","Linux >= afd2daa26c7abd734d78bd274fc6c59a15e61063 < 84ea9c99874804f5ca13f35bbc186ba93902f30f","Linux >= afd2daa26c7abd734d78bd274fc6c59a15e61063 < 502adc06ba76dee19c292ae4a07d74d202fe734d","Linux 5.13"],"published":"2026-09-17","updated":"2026-09-17","sourceUpdated":"2026-09-17T17:17:22.087","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-90257","references":[{"url":"https://git.kernel.org/stable/c/0e388d805233a883a31271676eae6031dfc9e898","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/502adc06ba76dee19c292ae4a07d74d202fe734d","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/54e9387eb7546eaa6f600220599d55740956ffc3","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/84ea9c99874804f5ca13f35bbc186ba93902f30f","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/be1e3df2c49c91b0a052c6563884e8d39bd768b2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d08c99abf06133a7829d46627e77e3315ca974d2","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/fb445b3466a8d1c7a0b0d0676fb475e3ce22d94e","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd","cve.org"],"ingestedAt":"2026-09-17T16:21:47.841Z","epss":0.00205,"epssPercentile":0.10895,"slug":"CVE-2026-90257","body":"## Overview\n\nIn 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}