Bluetooth: L2CAP: Fix user-after-free
Priority MEDIUM 40CWE-416Published · Updated
Key facts
- Attack vector
- Adjacent network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 23 fixed, 1 without a fix
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.
Summary
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix user-after-free This uses l2cap_chan_hold_unless_zero() after calling __l2cap_get_chan_blah() to prevent the following trace: Bluetooth: l2cap_core.c:static void l2cap_chan_destroy(struct kref *kref) Bluetooth: chan 0000000023c4974d Bluetooth: parent 00000000ae861c08 ================================================================== BUG: KASAN: use-after-free in __mutex_waiter_is_first kernel/locking/mutex.c:191 [inline] BUG: KASAN: use-after-free in __mutex_lock_common kernel/locking/mutex.c:671 [inline] BUG: KASAN: use-after-free in __mutex_lock+0x278/0x400 kernel/locking/mutex.c:729 Read of size 8 at addr ffff888006a49b08 by task kworker/u3:2/389
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00369 30th percentileScored 2026-11-07
Fix Partial Linux (Linux): 4.9.331, 4.14.296, 4.19.262 +6Red Hat: 12 advisoriesRed Hat: 23 fixed, 1 without a fix
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 3.4 and later | 4.9.331, 4.14.296, 4.19.262, 5.4.220, 5.10.150, 5.15.75, 5.19.17, 6.0.3, 6.1 | Patch available | CNA |
- Linux VendorLinux Affected 3.4 and later Fixed in 4.9.331, 4.14.296, 4.19.262, 5.4.220, 5.10.150, 5.15.75, 5.19.17, 6.0.3, 6.1 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | before 4.9.331; 4.10 to before 4.14.296; 4.15 to before 4.19.262; 4.20 to before 5.4.220; 5.5 to before 5.10.150; 5.11 to before 5.15.75; 5.16 to before 5.19.17; 6.0 to before 6.0.3 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions before 4.9.331; 4.10 to before 4.14.296; 4.15 to before 4.19.262; 4.20 to before 5.4.220; 5.5 to before 5.10.150; 5.11 to before 5.15.75; 5.16 to before 5.19.17; 6.0 to before 6.0.3 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.9.331, 4.14.296, 4.19.262, 5.4.220, 5.10.150, 5.15.75, 5.19.17, 6.0.3, 6.1
Red Hat 12 advisories
- RHSA-2025:23445 Released 2025-12-17 · Red Hat rating Importantkernel security update
- Red Hat Enterprise Linux BaseOS AUS (v. 8.2) bpftool-4.18.0-193.178.1.el8_2, kernel-4.18.0-193.178.1.el8_2, kernel-abi-whitelists-4.18.0-193.178.1.el8_2 +14
- RHSA-2025:22914 Released 2025-12-09 · Red Hat rating Moderatekernel-rt security update
- Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt-3.10.0-1160.143.1.rt56.1295.el7, kernel-rt-debug-3.10.0-1160.143.1.rt56.1295.el7, kernel-rt-debug-devel-3.10.0-1160.143.1.rt56.1295.el7 +4
- RHSA-2025:22910 Released 2025-12-09 · Red Hat rating Moderatekernel security update
- Red Hat Enterprise Linux Server (v. 7 ELS) bpftool-3.10.0-1160.143.1.el7, kernel-3.10.0-1160.143.1.el7, kernel-abi-whitelists-3.10.0-1160.143.1.el7 +11
- Red Hat Enterprise Linux Server Optional (v. 7 ELS) kernel-debug-devel-3.10.0-1160.143.1.el7, kernel-tools-libs-devel-3.10.0-1160.143.1.el7
Show 9 more Red Hat advisories
- RHSA-2025:22752 Released 2025-12-04 · Red Hat rating Moderatekernel security update
- Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.179.1.el8_4, kernel-4.18.0-305.179.1.el8_4, kernel-abi-stablelists-4.18.0-305.179.1.el8_4 +14
- Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.179.1.el8_4, kernel-4.18.0-305.179.1.el8_4, kernel-abi-stablelists-4.18.0-305.179.1.el8_4 +14
- RHSA-2025:22124 Released 2025-11-25 · Red Hat rating Moderatekernel-rt security update
- Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.148.1.rt14.433.el9_2, kernel-rt-core-5.14.0-284.148.1.rt14.433.el9_2, kernel-rt-debug-5.14.0-284.148.1.rt14.433.el9_2 +9
- Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.148.1.rt14.433.el9_2, kernel-rt-core-5.14.0-284.148.1.rt14.433.el9_2, kernel-rt-debug-5.14.0-284.148.1.rt14.433.el9_2 +11
- RHSA-2025:22095 Released 2025-11-25 · Red Hat rating Moderatekernel security update
- Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.148.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.148.1.el9_2, kernel-64k-devel-5.14.0-284.148.1.el9_2 +10
- Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.148.1.el9_2, kernel-5.14.0-284.148.1.el9_2, kernel-64k-5.14.0-284.148.1.el9_2 +29
- RHSA-2025:22006 Released 2025-11-25 · Red Hat rating Moderatekernel security update
- Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.170.1.el8_6, kernel-4.18.0-372.170.1.el8_6, kernel-abi-stablelists-4.18.0-372.170.1.el8_6 +14
- Red Hat Enterprise Linux BaseOS E4S (v.8.6) bpftool-4.18.0-372.170.1.el8_6, kernel-4.18.0-372.170.1.el8_6, kernel-abi-stablelists-4.18.0-372.170.1.el8_6 +19
- Red Hat Enterprise Linux BaseOS TUS (v.8.6) bpftool-4.18.0-372.170.1.el8_6, kernel-4.18.0-372.170.1.el8_6, kernel-abi-stablelists-4.18.0-372.170.1.el8_6 +14
- RHSA-2025:21136 Released 2025-11-12 · Red Hat rating Moderatekernel-rt security update
- Red Hat Enterprise Linux NFV E4S (v.9.0) kernel-rt-5.14.0-70.153.1.rt21.225.el9_0, kernel-rt-core-5.14.0-70.153.1.rt21.225.el9_0, kernel-rt-debug-5.14.0-70.153.1.rt21.225.el9_0 +9
- Red Hat Enterprise Linux Real Time E4S (v.9.0) kernel-rt-5.14.0-70.153.1.rt21.225.el9_0, kernel-rt-core-5.14.0-70.153.1.rt21.225.el9_0, kernel-rt-debug-5.14.0-70.153.1.rt21.225.el9_0 +7
- RHSA-2025:21091 Released 2025-11-12 · Red Hat rating Moderatekernel security update
- Red Hat Enterprise Linux AppStream E4S (v.9.0) kernel-debug-devel-5.14.0-70.153.1.el9_0, kernel-debug-devel-matched-5.14.0-70.153.1.el9_0, kernel-devel-5.14.0-70.153.1.el9_0 +5
- Red Hat Enterprise Linux BaseOS E4S (v.9.0) bpftool-5.14.0-70.153.1.el9_0, kernel-5.14.0-70.153.1.el9_0, kernel-abi-stablelists-5.14.0-70.153.1.el9_0 +14
- RHSA-2025:21083 Released 2025-11-12 · Red Hat rating Moderatekernel security update
- Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.118.1.el8_8, kernel-4.18.0-477.118.1.el8_8, kernel-abi-stablelists-4.18.0-477.118.1.el8_8 +14
- Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.118.1.el8_8, kernel-4.18.0-477.118.1.el8_8, kernel-abi-stablelists-4.18.0-477.118.1.el8_8 +14
- RHSA-2025:19102 Released 2025-10-27 · Red Hat rating Moderatekernel security update
- Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.81.1.el8_10, kernel-4.18.0-553.81.1.el8_10, kernel-abi-stablelists-4.18.0-553.81.1.el8_10 +19
- Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.81.1.el8_10
- RHSA-2025:19103 Released 2025-10-27 · Red Hat rating Moderatekernel-rt security update
- Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.81.1.rt7.422.el8_10, kernel-rt-core-4.18.0-553.81.1.rt7.422.el8_10, kernel-rt-debug-4.18.0-553.81.1.rt7.422.el8_10 +9
- Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.81.1.rt7.422.el8_10, kernel-rt-core-4.18.0-553.81.1.rt7.422.el8_10, kernel-rt-debug-4.18.0-553.81.1.rt7.422.el8_10 +7
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
| Red Hat Enterprise Linux AppStream E4S (v.9.0) | Fixed | RHSA-2025:21091 |
| Red Hat Enterprise Linux AppStream E4S (v.9.2) | Fixed | RHSA-2025:22095 |
| Red Hat Enterprise Linux BaseOS (v. 8) | Fixed | RHSA-2025:19102 |
| Red Hat Enterprise Linux BaseOS AUS (v. 8.2) | Fixed | RHSA-2025:23445 |
| Red Hat Enterprise Linux BaseOS AUS (v.8.4) | Fixed | RHSA-2025:22752 |
| Red Hat Enterprise Linux BaseOS AUS (v.8.6) | Fixed | RHSA-2025:22006 |
| Red Hat Enterprise Linux BaseOS E4S (v.8.6) | Fixed | RHSA-2025:22006 |
| Red Hat Enterprise Linux BaseOS E4S (v.8.8) | Fixed | RHSA-2025:21083 |
| Red Hat Enterprise Linux BaseOS E4S (v.9.0) | Fixed | RHSA-2025:21091 |
| Red Hat Enterprise Linux BaseOS E4S (v.9.2) | Fixed | RHSA-2025:22095 |
| Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) | Fixed | RHSA-2025:22752 |
| Red Hat Enterprise Linux BaseOS TUS (v.8.6) | Fixed | RHSA-2025:22006 |
| Red Hat Enterprise Linux BaseOS TUS (v.8.8) | Fixed | RHSA-2025:21083 |
| Red Hat Enterprise Linux CRB (v. 8) | Fixed | RHSA-2025:19102 |
| Red Hat Enterprise Linux NFV (v. 8) | Fixed | RHSA-2025:19103 |
| Red Hat Enterprise Linux NFV E4S (v.9.0) | Fixed | RHSA-2025:21136 |
| Red Hat Enterprise Linux RT (v. 8) | Fixed | RHSA-2025:19103 |
| Red Hat Enterprise Linux Real Time E4S (v.9.0) | Fixed | RHSA-2025:21136 |
| Red Hat Enterprise Linux Real Time E4S (v.9.2) | Fixed | RHSA-2025:22124 |
| Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) | Fixed | RHSA-2025:22124 |
| Red Hat Enterprise Linux Server (v. 7 ELS) | Fixed | RHSA-2025:22910 |
| Red Hat Enterprise Linux Server Optional (v. 7 ELS) | Fixed | RHSA-2025:22910 |
| Red Hat Enterprise Linux for Real Time (v. 7 ELS) | Fixed | RHSA-2025:22914 |
Not affected: 2 products
- Red Hat Enterprise Linux 10
- Red Hat Enterprise Linux 6
Timeline
- 2026-10-02 Threatist record created from CVE-2022-50386
- 2026-10-03 Alias added: GHSA-q9hj-m4q6-fcrh
References
Patch 9
- https://git.kernel.org/stable/c/11e40d6c0823f699d8ad501e48d1c3ae4be386cd
- https://git.kernel.org/stable/c/843fc4e386dd84b806a7f07fb062d8c3a44e5364
- https://git.kernel.org/stable/c/d91fc2836562f299f34e361e089e9fe154da4f73
- https://git.kernel.org/stable/c/7d6f9cb24d2b2f6b6370eac074e2e6b1bafdad45
- https://git.kernel.org/stable/c/0c108cf3ad386e0084277093b55a351c49e0be27
- https://git.kernel.org/stable/c/d1e894f950ad48897d1a7cb05909ea29d8c3810e
- https://git.kernel.org/stable/c/6ffde6e03085874ae22263ff4cef4869f797e84f
- https://git.kernel.org/stable/c/15fc21695eb606bdc5d483b92118ee42610a952d
- https://git.kernel.org/stable/c/35fcbc4243aad7e7d020b7c1dfb14bb888b20a4f
More Linux Kernel vulnerabilities
- TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2022-50386 · CVE Program
- CVE-2022-50386 · NVD
- FIRST EPSS
- GHSA-q9hj-m4q6-fcrh · GitHub Advisory Database · CC BY 4.0
- CVE-2022-50386 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences