Answer in brief
CVE-2026-90257 records a Unknown severity vulnerability in Bluetooth: virtio_bt: avoid OOB read of build info string. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=afd2daa26c7abd734d78bd274fc6c59a15e61063 <fb445b3466a8d1c7a0b0d0676fb475e3ce22d94e || >=afd2daa26c7abd734d78bd274fc6c59a15e61063 <d08c99abf06133a7829d46627e77e3315ca974d2 || >=afd2daa26c7abd734d78bd274fc6c59a15e61063 <0e388d805233a883a31271676eae6031dfc9e898 || >=afd2daa26c7abd734d78bd274fc6c59a15e61063 <54e9387eb7546eaa6f600220599d55740956ffc3 || >=afd2daa26c7abd734d78bd274fc6c59a15e61063 <be1e3df2c49c91b0a052c6563884e8d39bd768b2 || >=afd2daa26c7abd734d78bd274fc6c59a15e61063 <84ea9c99874804f5ca13f35bbc186ba93902f30f || >=afd2daa26c7abd734d78bd274fc6c59a15e61063 <502adc06ba76dee19c292ae4a07d74d202fe734d | fb445b3466a8d1c7a0b0d0676fb475e3ce22d94e, d08c99abf06133a7829d46627e77e3315ca974d2, 0e388d805233a883a31271676eae6031dfc9e898, 54e9387eb7546eaa6f600220599d55740956ffc3, be1e3df2c49c91b0a052c6563884e8d39bd768b2, 84ea9c99874804f5ca13f35bbc186ba93902f30f, 502adc06ba76dee19c292ae4a07d74d202fe734d |
| Linux/Linuxgeneric | 5.13 | Not reported |
Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 17, 2026
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.
Quoted source text, attributed separately from HOL analysis.