Bug 2455334 (CVE-2026-31408) - CVE-2026-31408 kernel: Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold
Summary: CVE-2026-31408 kernel: Bluetooth: SCO: Fix use-after-free in sco_recv_frame()...
Keywords:
Status: NEW
Alias: CVE-2026-31408
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-04-06 09:01 UTC by OSIDB Bzimport
Modified: 2026-07-16 07:16 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:19569 0 None None None 2026-05-20 12:15:50 UTC
Red Hat Product Errata RHSA-2026:21556 0 None None None 2026-05-28 01:24:00 UTC
Red Hat Product Errata RHSA-2026:21706 0 None None None 2026-05-28 08:26:00 UTC
Red Hat Product Errata RHSA-2026:21745 0 None None None 2026-05-28 13:26:24 UTC
Red Hat Product Errata RHSA-2026:35894 0 None None None 2026-07-06 13:42:04 UTC
Red Hat Product Errata RHSA-2026:35896 0 None None None 2026-07-06 14:26:43 UTC
Red Hat Product Errata RHSA-2026:35904 0 None None None 2026-07-06 14:26:08 UTC
Red Hat Product Errata RHSA-2026:36073 0 None None None 2026-07-07 05:33:58 UTC
Red Hat Product Errata RHSA-2026:36767 0 None None None 2026-07-08 14:51:29 UTC
Red Hat Product Errata RHSA-2026:38902 0 None None None 2026-07-13 12:50:39 UTC
Red Hat Product Errata RHSA-2026:39371 0 None None None 2026-07-14 16:41:13 UTC
Red Hat Product Errata RHSA-2026:40760 0 None None None 2026-07-16 07:16:14 UTC

Description OSIDB Bzimport 2026-04-06 09:01:27 UTC 
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.
Comment 1 Keith Grant 2026-04-06 11:48:39 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026040629-CVE-2026-31408-9f0f@gregkh/T
Comment 3 errata-xmlrpc 2026-05-20 12:15:49 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:19569 https://access.redhat.com/errata/RHSA-2026:19569
Comment 4 errata-xmlrpc 2026-05-28 01:23:59 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9

Via RHSA-2026:21556 https://access.redhat.com/errata/RHSA-2026:21556
Comment 5 errata-xmlrpc 2026-05-28 08:25:59 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:21706 https://access.redhat.com/errata/RHSA-2026:21706
Comment 6 errata-xmlrpc 2026-05-28 13:26:23 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2026:21745 https://access.redhat.com/errata/RHSA-2026:21745
Comment 8 errata-xmlrpc 2026-07-06 13:42:03 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On

Via RHSA-2026:35894 https://access.redhat.com/errata/RHSA-2026:35894
Comment 9 errata-xmlrpc 2026-07-06 14:26:07 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:35904 https://access.redhat.com/errata/RHSA-2026:35904
Comment 10 errata-xmlrpc 2026-07-06 14:26:42 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support
  Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On

Via RHSA-2026:35896 https://access.redhat.com/errata/RHSA-2026:35896
Comment 11 errata-xmlrpc 2026-07-07 05:33:57 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions

Via RHSA-2026:36073 https://access.redhat.com/errata/RHSA-2026:36073
Comment 12 errata-xmlrpc 2026-07-08 14:51:28 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions

Via RHSA-2026:36767 https://access.redhat.com/errata/RHSA-2026:36767
Comment 13 errata-xmlrpc 2026-07-13 12:50:38 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 9.6 Extended Update Support

Via RHSA-2026:38902 https://access.redhat.com/errata/RHSA-2026:38902
Comment 14 errata-xmlrpc 2026-07-14 16:41:12 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10.0 Extended Update Support

Via RHSA-2026:39371 https://access.redhat.com/errata/RHSA-2026:39371
Comment 15 errata-xmlrpc 2026-07-16 07:16:13 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions
  Red Hat Enterprise Linux 8.8 Telecommunications Update Service

Via RHSA-2026:40760 https://access.redhat.com/errata/RHSA-2026:40760
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