CVE-2026-74534
- Source
- https://cve.org/CVERecord?id=CVE-2026-74534
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74534.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-74534
- Downstream
BELL (1)
DEBIAN (1)
openSUSE (1)
SUSE (6)
UBUNTU (1)
- Related
- Published
- 2026-08-15T12:27:47Z
- Modified
- 2026-10-25T02:31:01Z
- Severity
-
- 8.8 (High) CVSS_V3 - CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS Calculator
- Summary
- Bluetooth: ISO: fix refcounting of iso_conn
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: ISO: fix refcounting of iso_conn
iso_conn_del() and iso_chan_del() have a race that results to double-put of iso_conn:
[Task hdev->workqueue] [Task 2] iso_conn_del iso_chan_del iso_conn_hold_unless_zero iso_conn_lock iso_conn_lock conn->sk = NULL iso_conn_unlock sk = iso_sock_hold(conn) <---------ยด if (!sk) iso_conn_put iso_conn_put iso_conn_put /* UAF */The extra put for !sk in iso_conn_del() is currently required since failing iso_chan_add() may leave iso_conn not associated with any sk.
Fix by having iso_pi(sk)->conn own refcount when non-NULL, so iso_conn_del does not need to put it. Adjust the iso_conn_add() refcounting so that conn is put if it does not get associated with an sk.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74534.json" }- References
-
- https://git.kernel.org/stable/c/3b921533e8aa95b77aadcf31737595578e735f3c
- https://git.kernel.org/stable/c/42c8bd6ac81e21200bb90f1eaf43d19352eec6d7
- https://git.kernel.org/stable/c/8208b4939afb0a1977fffe902c3ca42fe0f3baaa
- https://git.kernel.org/stable/c/fdfde532ab1caa165fcd8985001157ac8b4db365
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74534.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-74534
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduceda58d0f5dac322e16cc75334d000666512341bde5Fixed42c8bd6ac81e21200bb90f1eaf43d19352eec6d7
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduceddc26097bdb864a0d5955b9a25e43376ffc1af99bFixed3b921533e8aa95b77aadcf31737595578e735f3cFixed8208b4939afb0a1977fffe902c3ca42fe0f3baaaFixedfdfde532ab1caa165fcd8985001157ac8b4db365
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.12.2Fixed6.12.113
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introduced6.11.11Fixed6.12
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedf53e7489273dc2bb307bf50f319b3762d45534f0
Affected versions
v6.*
v6.11.11
v6.12.10
v6.12.100
v6.12.101
v6.12.102
v6.12.103
v6.12.104
v6.12.105
v6.12.106
v6.12.107
v6.12.108
v6.12.109
v6.12.11
v6.12.110
v6.12.111
v6.12.112
v6.12.12
v6.12.13
v6.12.14
v6.12.15
v6.12.16
v6.12.17
v6.12.18
v6.12.19
v6.12.2
v6.12.20
v6.12.21
v6.12.22
v6.12.23
v6.12.24
v6.12.25
v6.12.26
v6.12.27
v6.12.28
v6.12.29
v6.12.3
v6.12.30
v6.12.31
v6.12.32
v6.12.33
v6.12.34
v6.12.35
v6.12.36
v6.12.37
v6.12.38
v6.12.39
v6.12.4
v6.12.40
v6.12.41
v6.12.42
v6.12.43
v6.12.44
v6.12.45
v6.12.46
v6.12.47
v6.12.48
v6.12.49
v6.12.5
v6.12.50
v6.12.51
v6.12.52
v6.12.53
v6.12.54
v6.12.55
v6.12.56
v6.12.57
v6.12.58
v6.12.59
v6.12.6
v6.12.60
v6.12.61
v6.12.62
v6.12.63
v6.12.64
v6.12.65
v6.12.66
v6.12.67
v6.12.68
v6.12.69
v6.12.7
v6.12.70
v6.12.71
v6.12.72
v6.12.73
v6.12.74
v6.12.75
v6.12.76
v6.12.77
v6.12.78
v6.12.79
v6.12.8
v6.12.80
v6.12.81
v6.12.82
v6.12.83
v6.12.84
v6.12.85
v6.12.86
v6.12.87
v6.12.88
v6.12.89
v6.12.9
v6.12.90
v6.12.91
v6.12.92
v6.12.93
v6.12.94
v6.12.95
v6.12.96
v6.12.97
v6.12.98
v6.12.99