Privilege escalation via SCO socket release race
Published May 13, 2024 · Updated Aug 5, 2026
Use-after-free in Linux kernel Bluetooth SCO sockets allows local users to escalate privileges through a connection-release race. sco_sock_release frees the socket while delayed timeout_work remains queued, so sco_sock_timeout later calls sock_hold on freed slab memory. Exploitation requires an established SCO/eSCO link and timing controlled through unprivileged socket calls; failed attempts can still panic the kernel.
Summary
What happened
Use-after-free in Linux kernel Bluetooth SCO sockets allows local users to escalate privileges through a connection-release race. sco_sock_release frees the socket while delayed timeout_work remains queued, so sco_sock_timeout later calls sock_hold on freed slab memory. Exploitation requires an established SCO/eSCO link and timing controlled through unprivileged socket calls; failed attempts can still panic the kernel.
The record
- CVE
- CVE-2024-27398
- Published
- May 13, 2024
- Updated
- Aug 5, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux
- Classifications
- CWE-416, T1068
- Attack vector
- adjacent
- Privileges
- authenticated
Timeline
How it unfolded
- May 13, 2024CVE 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?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=37d7ae2b0578f2373674a755402ee722e96edc08 <3212afd00e3cda790fd0583cb3eaef8f9575a014
- Affected versionversion=4.14.263 <4.15
- Affected versionversion=4.19.207 <4.19.314
- Affected versionversion=48669c81a65628ef234cbdd91b9395952c7c27fe <1b33d55fb7355e27f8c82cd4ecd560f162469249
- Affected versionversion=5.10.67 <5.10.217
- Affected versionversion=5.13.19 <5.14
- Affected versionversion=5.14.6 <5.15
- Affected versionversion=5.15
- Affected versionversion=5.4.148 <5.4.276
- Affected versionversion=a1073aad497d0d071a71f61b721966a176d50c08 <33a6e92161a78c1073d90e27abe28d746feb0a53
- Affected versionversion=b657bba82ff6a007d84fd076bd73b11131726a2b
- Affected versionversion=ba316be1b6a00db7126ed9a39f9bee434a508043 <012363cb1bec5f33a7b94629ab2c1086f30280f2
- Affected versionversion=ba316be1b6a00db7126ed9a39f9bee434a508043 <483bc08181827fc475643272ffb69c533007e546
- Affected versionversion=ba316be1b6a00db7126ed9a39f9bee434a508043 <50c2037fc28df870ef29d9728c770c8955d32178
- Affected versionversion=ba316be1b6a00db7126ed9a39f9bee434a508043 <6a18eeb1b3bbc67c20d9609c31dca6a69b4bcde5
- Affected versionversion=ba316be1b6a00db7126ed9a39f9bee434a508043 <bfab2c1f7940a232cd519e82fff137e308abfd93
- Affected versionversion=ec1f74319bb35c1c90c25014ec0f6ea6c3ca2134
- Affected versionversion=fea63ccd928c01573306983346588b26cffb5572
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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