Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_conn: fix potential UAF in set_cig_params_sync hci_conn lookup and field access must be covered by hdev lock in set_cig_params_sync, otherwise it's possible it is freed concurrently. Take hdev lock to prevent hci_conn from being deleted or modified concurrently. Just RCU lock is not suitable here, as we also want to avoid "tearing" in the configuration.
CVE-2026-43019
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-2026-43019
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": "a091289218202bc09d9b9caa8afcde1018584aec",
"lessThan": "7502c1cf303b69f71d085f5ff7251b0e1b0f09df",
"versionType": "git"
},
{
"status": "affected",
"version": "a091289218202bc09d9b9caa8afcde1018584aec",
"lessThan": "66d432e9b45bae7881ffcdb12cd8fd0bf254ef02",
"versionType": "git"
},
{
"status": "affected",
"version": "a091289218202bc09d9b9caa8afcde1018584aec",
"lessThan": "7d568fede8eac91161a60b710aa920abe9b0fb9f",
"versionType": "git"
},
{
"status": "affected",
"version": "a091289218202bc09d9b9caa8afcde1018584aec",
"lessThan": "bad65b4b0a96139f023eadc28a33125963208449",
"versionType": "git"
},
{
"status": "affected",
"version": "a091289218202bc09d9b9caa8afcde1018584aec",
"lessThan": "a2639a7f0f5bf7d73f337f8f077c19415c62ed2c",
"versionType": "git"
},
{
"status": "affected",
"version": "3a273cd0f47dd672d37736e623849374f9ab9ce9",
"versionType": "git"
},
{
"status": "affected",
"version": "d8570c4c3f2a3e51b3c8b5e6ec898364c5c03062",
"versionType": "git"
},
{
"status": "affected",
"version": "6.4.16",
"lessThan": "6.5",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.5.3",
"lessThan": "6.6",
"versionType": "semver"
}
],
"programFiles": [
"net/bluetooth/hci_conn.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.6"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.6",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.143",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.81",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.22",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "6.19.12",
"versionType": "semver",
"lessThanOrEqual": "6.19.*"
},
{
"status": "unaffected",
"version": "7.0",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/bluetooth/hci_conn.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-43019
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #40004 · Revision 1
- Added to Heist Feed
- Publisher date