title: net: hso: fix NULL-deref on disconnect regression
description: In the Linux kernel, the following vulnerability has been resolved:
net: hso: fix NULL-deref on disconnect regression
Commit 8a12f8836145 ("net: hso: fix null-ptr-deref during tty device
unregistration") fixed the racy minor allocation reported by syzbot, but
introduced an unconditional NULL-pointer dereference on every disconnect
instead.
Specifically, the serial device table must no longer be accessed after
the minor has been released by hso_serial_tty_unregister().
affected:
{
product: Linux
vendor: Linux
defaultStatus: unaffected
repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
versions:
version: a462067d7c8e, lessThan: 5871761c5f0f, status: affected, versionType: git
version: 145c89c441d2, lessThan: 0c71d4c89559, status: affected, versionType: git
version: caf5ac93b3b5, lessThan: 24b699bea755, status: affected, versionType: git
version: 92028d7a31e5, lessThan: 5c17cfe155d2, status: affected, versionType: git
version: 4a2933c88399, lessThan: d7fad2ce15bd, status: affected, versionType: git
version: dc195928d7e4, lessThan: 90642ee9eb58, status: affected, versionType: git
version: 388d05f70f1e, lessThan: 0f000005da31, status: affected, versionType: git
version: 8a12f8836145, lessThan: 41c44e1f3112, status: affected, versionType: git
version: 8a12f8836145, lessThan: 2ad5692db728, status: affected, versionType: git
}
{
product: Linux
vendor: Linux
defaultStatus: affected
repo: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
versions:
version: 5.12, status: affected
version: 0, lessThan: 5.12, status: unaffected, versionType: custom
version: 4.19.189, lessThanOrEqual: 4.19.*, status: unaffected, versionType: custom
version: 5.4.115, lessThanOrEqual: 5.4.*, status: unaffected, versionType: custom
version: 5.10.33, lessThanOrEqual: 5.10.*, status: unaffected, versionType: custom
version: 5.11.17, lessThanOrEqual: 5.11.*, status: unaffected, versionType: custom
version: 5.12.1, lessThanOrEqual: 5.12.*, status: unaffected, versionType: custom
version: 5.13, lessThanOrEqual: *, status: unaffected, versionType: original_commit_for_fix
}
