Bluetooth: virtio_bt: avoid OOB read of build info string
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.
CVE-2026-90257
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-90257
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "afd2daa26c7abd734d78bd274fc6c59a15e61063",
"lessThan": "fb445b3466a8d1c7a0b0d0676fb475e3ce22d94e",
"versionType": "git"
},
{
"status": "affected",
"version": "afd2daa26c7abd734d78bd274fc6c59a15e61063",
"lessThan": "d08c99abf06133a7829d46627e77e3315ca974d2",
"versionType": "git"
},
{
"status": "affected",
"version": "afd2daa26c7abd734d78bd274fc6c59a15e61063",
"lessThan": "0e388d805233a883a31271676eae6031dfc9e898",
"versionType": "git"
},
{
"status": "affected",
"version": "afd2daa26c7abd734d78bd274fc6c59a15e61063",
"lessThan": "54e9387eb7546eaa6f600220599d55740956ffc3",
"versionType": "git"
},
{
"status": "affected",
"version": "afd2daa26c7abd734d78bd274fc6c59a15e61063",
"lessThan": "be1e3df2c49c91b0a052c6563884e8d39bd768b2",
"versionType": "git"
},
{
"status": "affected",
"version": "afd2daa26c7abd734d78bd274fc6c59a15e61063",
"lessThan": "84ea9c99874804f5ca13f35bbc186ba93902f30f",
"versionType": "git"
},
{
"status": "affected",
"version": "afd2daa26c7abd734d78bd274fc6c59a15e61063",
"lessThan": "502adc06ba76dee19c292ae4a07d74d202fe734d",
"versionType": "git"
}
],
"programFiles": [
"drivers/bluetooth/virtio_bt.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.13"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.13",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "5.15.221",
"versionType": "semver",
"lessThanOrEqual": "5.15.*"
},
{
"status": "unaffected",
"version": "6.1.188",
"versionType": "semver",
"lessThanOrEqual": "6.1.*"
},
{
"status": "unaffected",
"version": "6.6.157",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.110",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.52",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.6",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/bluetooth/virtio_bt.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-90257
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #36622 · Revision 1
- Added to Heist Feed
- Publisher date