Bluetooth: fix dangling sco_conn and use-after-free in sco_sock_timeout
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Partial Red Hat: 4 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: fix dangling sco_conn and use-after-free in sco_sock_timeout Connecting the same socket twice consecutively in sco_sock_connect() could lead to a race condition where two sco_conn objects are created but only one is associated with the socket. If the socket is closed before the SCO connection is established, the timer associated with the dangling sco_conn object won't be canceled. As the sock object is being freed, the use-after-free problem happens when the timer callback function sco_sock_timeout() accesses the socket. Here's the call trace: dump_stack+0x107/0x163 ? refcount_inc+0x1c/ print_address_description.constprop.0+0x1c/0x47e ? refcount_inc+0x1c/0x7b kasan_report+0x13a/0x173 ? refcount_inc+0x1c/0x7b check_memory_region+0x132/0x139 refcount_inc+0x1c/0x7b sco_sock_timeout+0xb2/0x1ba process_one_work+0x739/0xbd1 ? cancel_delayed_work+0x13f/0x13f ? __raw_spin_lock_init+0xf0/0xf0 ? to_kthread+0x59/0x85 worker_thread+0x593/0x70e kthread+0x346/0x35a ? drain_workqueue+0x31a/0x31a ? kthread_bind+0x4b/0x4b ret_from_fork+0x1f/0x30
Why it matters now
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 | 4.9.283 to before 4.9.318; 4.14.247 to before 4.14.283; 4.19.207 to before 4.19.247; 5.4.146 to before 5.4.198; 5.10.65 to before 5.10.121; 4.4.284 to before 4.5; 5.13.17 to before 5.14; 5.14.4 to before 5.15 | 4.9.318, 4.14.283, 4.19.247, 5.4.198, 5.10.121, 4.5, 5.14, 5.15 | Patch available | CNA |
| Linux | Linux | 5.15 and later | 4.9.318, 4.14.283, 4.19.247, 5.4.198, 5.10.121, 5.15.46, 5.17.14, 5.18.3, 5.19 | Patch available | CNA |
- Linux VendorLinux Affected 4.9.283 to before 4.9.318; 4.14.247 to before 4.14.283; 4.19.207 to before 4.19.247; 5.4.146 to before 5.4.198; 5.10.65 to before 5.10.121; 4.4.284 to before 4.5; 5.13.17 to before 5.14; 5.14.4 to before 5.15 Fixed in 4.9.318, 4.14.283, 4.19.247, 5.4.198, 5.10.121, 4.5, 5.14, 5.15 Patch available CNA
- Linux VendorLinux Affected 5.15 and later Fixed in 4.9.318, 4.14.283, 4.19.247, 5.4.198, 5.10.121, 5.15.46, 5.17.14, 5.18.3, 5.19 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 4.4.284 to before 4.5; 4.9.238 to before 4.9.318; 4.14.247 to before 4.14.283; 4.19.207 to before 4.19.247; 5.4.146 to before 5.4.198; 5.10.65 to before 5.10.121; 5.13.17 to before 5.14; 5.14.4 to before 5.15.46; 5.16 to before 5.17.14; 5.18 to before 5.18.3 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 4.4.284 to before 4.5; 4.9.238 to before 4.9.318; 4.14.247 to before 4.14.283; 4.19.207 to before 4.19.247; 5.4.146 to before 5.4.198; 5.10.65 to before 5.10.121; 5.13.17 to before 5.14; 5.14.4 to before 5.15.46; 5.16 to before 5.17.14; 5.18 to before 5.18.3 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.9.318, 4.14.283, 4.19.247, 5.4.198, 5.10.121, 4.5, 5.14, 5.15
- Fix · CNA Linux (Linux) Fixed in 4.9.318, 4.14.283, 4.19.247, 5.4.198, 5.10.121, 5.15.46, 5.17.14, 5.18.3, 5.19
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 6 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 7 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 8 | Affected | No fix planned: Out of support scope |
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
Not affected: 1 product
- Red Hat Enterprise Linux 10
Timeline
- 2026-10-02 Threatist record created from CVE-2022-49474
- 2026-10-03 Alias added: GHSA-gfvc-29p2-2qqj
References
Patch 9
- https://git.kernel.org/stable/c/9de3dc09e56f8deacd2bdbf4cecb71e11a312405
- https://git.kernel.org/stable/c/7d61dbd7311ab978d8ddac1749a758de4de00374
- https://git.kernel.org/stable/c/390d82733a953c1fabf3de9c9618091a7a9c90a6
- https://git.kernel.org/stable/c/6f55fac0af3531cf60d11369454c41f5fc81ab3f
- https://git.kernel.org/stable/c/36c644c63bfcaee2d3a426f45e89a9cd09799318
- https://git.kernel.org/stable/c/65d347cb39e2e6bd0c2a745ad7c928998ebb0162
- https://git.kernel.org/stable/c/537f619dea4e3fa8ed1f8f938abffe3615794bcc
- https://git.kernel.org/stable/c/99df16007f4bbf9abfc3478cb17d10f0d7f8906e
- https://git.kernel.org/stable/c/7aa1e7d15f8a5b65f67bacb100d8fc033b21efa2
More Linux Kernel vulnerabilities
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- 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-2022-49474 · CVE Program
- CVE-2022-49474 · NVD
- FIRST EPSS
- GHSA-gfvc-29p2-2qqj · GitHub Advisory Database · CC BY 4.0
- CVE-2022-49474 · Red Hat security data · CC BY 4.0
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