Bluetooth: hci_sync: hold conn in hci_connect_big_sync() callback
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: hci_sync: hold conn in hci_connect_big_sync() callback There is theoretical UAF if the conn is freed while the hci_sync task is running. Hold refcount to avoid that. Handle NULL hcon, return 0 + do nothing to match the previous behavior.
CVE-2026-74530
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-2026-74530
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": "620810ac1f7f1133a9ac403e132b3ad6995ddf39",
"lessThan": "117d8bcaf1abc348185e8ab6a4ba9f8f516849a0",
"versionType": "git"
},
{
"status": "affected",
"version": "024421cf39923927ab2b5fe895d1d922b9abe67f",
"lessThan": "ff5625d27415ace5667bf87ebc16c3a0a98db22f",
"versionType": "git"
},
{
"status": "affected",
"version": "024421cf39923927ab2b5fe895d1d922b9abe67f",
"lessThan": "2d91e6244b69d752503b2d44020d8b0e323dbd38",
"versionType": "git"
},
{
"status": "affected",
"version": "024421cf39923927ab2b5fe895d1d922b9abe67f",
"lessThan": "56e78b670356caab0b607e8aad4cf819a1909d07",
"versionType": "git"
},
{
"status": "affected",
"version": "ee0586ad64a805eaf1a9a10100e908627a561e34",
"versionType": "git"
},
{
"status": "affected",
"version": "6.12.28",
"lessThan": "6.12.114",
"versionType": "semver"
},
{
"status": "affected",
"version": "6.14.6",
"lessThan": "6.15",
"versionType": "semver"
}
],
"programFiles": [
"net/bluetooth/hci_sync.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.8",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"net/bluetooth/hci_sync.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74530
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #46568 · Revision 1
- Added to Heist Feed
- Publisher date