CVE-2026-90257
CVE CVE-2026-90257EUVD EUVD-2026-81850Published 2026-09-17T16:07:56.000Z
What the advisory describes
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.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux afd2daa26c7abd734d78bd274fc6c59a15e61063 <be1e3df2c49c91b0a052c6563884e8d39bd768b2; patch: 6.6.157; afd2daa26c7abd734d78bd274fc6c59a15e61063 <502adc06ba76dee19c292ae4a07d74d202fe734d; afd2daa26c7abd734d78bd274fc6c59a15e61063 <d08c99abf06133a7829d46627e77e3315ca974d2; patch: 0; patch: 6.12.110; patch: 6.18.52; patch: 7.2.6; afd2daa26c7abd734d78bd274fc6c59a15e61063 <0e388d805233a883a31271676eae6031dfc9e898; afd2daa26c7abd734d78bd274fc6c59a15e61063 <84ea9c99874804f5ca13f35bbc186ba93902f30f; afd2daa26c7abd734d78bd274fc6c59a15e61063 <fb445b3466a8d1c7a0b0d0676fb475e3ce22d94e; patch: 6.1.188; afd2daa26c7abd734d78bd274fc6c59a15e61063 <54e9387eb7546eaa6f600220599d55740956ffc3; 5.13; patch: 7.3-rc1; patch: 5.15.221
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
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- Linux — Linux
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