Local privilege escalation via Bluetooth socket race
Published Feb 26, 2025 · Updated Aug 5, 2026
Use-after-free in Linux kernel Bluetooth SCO handling allows local users to gain kernel privileges through concurrent socket operations. sco_sock_connect() permits two concurrent connections on one socket to create separate sco_conn objects, leaving one timeout uncanceled after the socket is freed. An unprivileged local user needs an active Bluetooth HCI device; the stale sco_sock_timeout() callback enables kernel-memory access or a kernel crash.
Summary
What happened
Use-after-free in Linux kernel Bluetooth SCO handling allows local users to gain kernel privileges through concurrent socket operations. sco_sock_connect() permits two concurrent connections on one socket to create separate sco_conn objects, leaving one timeout uncanceled after the socket is freed. An unprivileged local user needs an active Bluetooth HCI device; the stale sco_sock_timeout() callback enables kernel-memory access or a kernel crash.
The record
- CVE
- CVE-2022-49474
- Published
- Feb 26, 2025
- Updated
- Aug 5, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-416, T1068
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 26, 2025CVE publishedPublication date reported by the CVE source.
- Aug 5, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=0115a66ebb44bd9127ccb58cf43ed23c795eb1f0 <7d61dbd7311ab978d8ddac1749a758de4de00374
- Affected versionversion=059c2c09f4b7f97711d0d8eaa0b9877f5e7d0a75 <36c644c63bfcaee2d3a426f45e89a9cd09799318
- Affected versionversion=0b9da4bde0d59c61b3675bdd80a05a726beb875a
- Affected versionversion=22c66af08230a7030bdb88accffaec3424695631 <9de3dc09e56f8deacd2bdbf4cecb71e11a312405
- Affected versionversion=4.14.247 <4.14.283
- Affected versionversion=4.19.207 <4.19.247
- Affected versionversion=4.4.284 <4.5
- Affected versionversion=4.9.283 <4.9.318
- Affected versionversion=5.10.65 <5.10.121
- Affected versionversion=5.13.17 <5.14
- Affected versionversion=5.14.4 <5.15
- Affected versionversion=5.15
- Affected versionversion=5.4.146 <5.4.198
- Affected versionversion=5ccb04c6e1fb7b97fa2e1785b67c3a1cb3527ef7 <6f55fac0af3531cf60d11369454c41f5fc81ab3f
- Affected versionversion=98ae477ed1540d3acbbf44d88ee237ad64275158
- Affected versionversion=bc4b08383046f3282b6fa58cfcef05bd13e52b93 <390d82733a953c1fabf3de9c9618091a7a9c90a6
- Affected versionversion=e1dee2c1de2b4dd00eb44004a4bda6326ed07b59 <537f619dea4e3fa8ed1f8f938abffe3615794bcc
- Affected versionversion=e1dee2c1de2b4dd00eb44004a4bda6326ed07b59 <65d347cb39e2e6bd0c2a745ad7c928998ebb0162
- Affected versionversion=e1dee2c1de2b4dd00eb44004a4bda6326ed07b59 <7aa1e7d15f8a5b65f67bacb100d8fc033b21efa2
- Affected versionversion=e1dee2c1de2b4dd00eb44004a4bda6326ed07b59 <99df16007f4bbf9abfc3478cb17d10f0d7f8906e
- Affected versionversion=f0c389e23e2475e5837716a629c81b7a9d90cc94
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Public exploit references
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Technologies
Your stack
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