AZL-81870
See a problem?- Import Source
- https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-81870.json
- JSON Data
- https://api.osv.dev/v1/vulns/AZL-81870
- Upstream
- Published
- 2026-04-06T08:16:38Z
- Modified
- 2026-08-28T17:47:55Z
- Summary
- CVE-2026-31408 affecting package kernel for versions less than 6.6.134.1-2
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold
sco_recv_frame() reads conn->sk under sco_conn_lock() but immediately releases the lock without holding a reference to the socket. A concurrent close() can free the socket between the lock release and the subsequent sk->sk_state access, resulting in a use-after-free.
Other functions in the same file (sco_sock_timeout(), sco_conn_del()) correctly use sco_sock_hold() to safely hold a reference under the lock.
Fix by using sco_sock_hold() to take a reference before releasing the lock, and adding sock_put() on all exit paths.
- References