CVE-2026-90257Bluetooth: virtio_bt: avoid OOB read of build info string
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: Bluetooth: virtio_bt: avoid OOB read of build info string The virtbt_setup_zephyr() sends the Zephyr vendor command 0xfc08 (Read Build Information) and hands the response to bt_dev_info() and hci_set_fw_info() as a "%s" string starting at skb->data + 1, without checking the length. A backend that answers with status only leaves that pointer past the end of the received data, so the walk reads adjacent slab memory until it meets a NUL. Those bytes reach the kernel log and the firmware-info debugfs file. To fix this, print the string with a bounded "%.*s" limited to skb->len - 1. A short or unterminated response then prints as much as arrived instead of failing setup. This mirrors commit dd068ef04412 ("Bluetooth: bpa10x: avoid OOB read of revision string in bpa10x_setup()"), which fixed the identical pattern.
- CVSS
- Not yet scored
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Sep 17, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from afd2daa26c7abd734d78bd274fc6c59a15e61063 before fb445b3466a8d1c7a0b0d0676fb475e3ce22d94e; from afd2daa26c7abd734d78bd274fc6c59a15e61063 before d08c99abf06133a7829d46627e77e3315ca974d2; from afd2daa26c7abd734d78bd274fc6c59a15e61063 before 0e388d805233a883a31271676eae6031dfc9e898; from afd2daa26c7abd734d78bd274fc6c59a15e61063 before 54e9387eb7546eaa6f600220599d55740956ffc3; from afd2daa26c7abd734d78bd274fc6c59a15e61063 before be1e3df2c49c91b0a052c6563884e8d39bd768b2; from afd2daa26c7abd734d78bd274fc6c59a15e61063 before 84ea9c99874804f5ca13f35bbc186ba93902f30f; from afd2daa26c7abd734d78bd274fc6c59a15e61063 before 502adc06ba76dee19c292ae4a07d74d202fe734d | CNA record |
References
- https://git.kernel.org/stable/c/fb445b3466a8d1c7a0b0d0676fb475e3ce22d94e
- https://git.kernel.org/stable/c/d08c99abf06133a7829d46627e77e3315ca974d2
- https://git.kernel.org/stable/c/0e388d805233a883a31271676eae6031dfc9e898
- https://git.kernel.org/stable/c/54e9387eb7546eaa6f600220599d55740956ffc3
- https://git.kernel.org/stable/c/be1e3df2c49c91b0a052c6563884e8d39bd768b2
- https://git.kernel.org/stable/c/84ea9c99874804f5ca13f35bbc186ba93902f30f
- https://git.kernel.org/stable/c/502adc06ba76dee19c292ae4a07d74d202fe734d
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.