Bluetooth: ISO: hold sk properly in iso_conn_ready
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: ISO: hold sk properly in iso_conn_ready sk deref in iso_conn_ready must be done either under conn->lock, or holding a refcount, to avoid concurrent close. conn->sk is currently accessed without either: [Task 1] [Task 2] iso_sock_release iso_conn_ready sk = conn->sk lock_sock(sk) conn->sk = NULL lock_sock(sk) release_sock(sk) iso_sock_kill(sk) UAF on sk deref Fix possible UAF by holding sk refcount in iso_conn_ready(). Also recheck after lock_sock that the socket is still valid. Adjust locking so conn->sk is cleared only under lock_sock.
CVE-2026-74537
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-2026-74537
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": "27c24fda62b601d6f9ca5e992502578c4310876f",
"lessThan": "44590dc53c9e949d2fed399a571a89c3d7d0b245",
"versionType": "git"
},
{
"status": "affected",
"version": "27c24fda62b601d6f9ca5e992502578c4310876f",
"lessThan": "99b65f0ea3370c13687ff870330c425b6ca44e89",
"versionType": "git"
},
{
"status": "affected",
"version": "27c24fda62b601d6f9ca5e992502578c4310876f",
"lessThan": "4e9b5e8669b3602a4e01b6d1e9539b72e42c84d5",
"versionType": "git"
},
{
"status": "affected",
"version": "27c24fda62b601d6f9ca5e992502578c4310876f",
"lessThan": "1308d72903d792d10b82bc4ef08b8a4452308b04",
"versionType": "git"
},
{
"status": "affected",
"version": "27c24fda62b601d6f9ca5e992502578c4310876f",
"lessThan": "0d255e63fcf3f13a570d7ac11678fa1164ac015c",
"versionType": "git"
}
],
"programFiles": [
"net/bluetooth/iso.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.15"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.15",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.44",
"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/iso.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74537
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #46570 · Revision 1
- Added to Heist Feed
- Publisher date