CVE-2023-54184

Summary

In the Linux kernel, the following vulnerability has been resolved:

scsi: target: iscsit: Free cmds before session free

Commands from recovery entries are freed after session has been closed. That leads to use-after-free at command free or NPE with such call trace:

Time2Retain timer expired for SID: 1, cleaning up iSCSI session. BUG: kernel NULL pointer dereference, address: 0000000000000140 RIP: 0010:sbitmap_queue_clear+0x3a/0xa0 Call Trace: target_release_cmd_kref+0xd1/0x1f0 [target_core_mod] transport_generic_free_cmd+0xd1/0x180 [target_core_mod] iscsit_free_cmd+0x53/0xd0 [iscsi_target_mod] iscsit_free_connection_recovery_entries+0x29d/0x320 [iscsi_target_mod] iscsit_close_session+0x13a/0x140 [iscsi_target_mod] iscsit_check_post_dataout+0x440/0x440 [iscsi_target_mod] call_timer_fn+0x24/0x140

Move cleanup of recovery enrties to before session freeing.

Affected Software

VendorProductVersion RangeStatus
LinuxLinux988e3a85463d9b6dabc681df3f8f131b23c19953 < 89f5055f9b0b57c7e7f02e32df95ef401f809b71affected
LinuxLinux988e3a85463d9b6dabc681df3f8f131b23c19953 < 4621e24c9257c6379343bf0c11b473817cf7edcdaffected
LinuxLinux988e3a85463d9b6dabc681df3f8f131b23c19953 < 1911cca5916b6e106de7afa3ec0a38447158216caffected
LinuxLinux988e3a85463d9b6dabc681df3f8f131b23c19953 < a7a4def6c7046e090bb10c6d550fdeb487db98baaffected
LinuxLinux988e3a85463d9b6dabc681df3f8f131b23c19953 < 4ce221d295f53e6c6b835ab33181e735482c9aacaffected
LinuxLinux988e3a85463d9b6dabc681df3f8f131b23c19953 < d8990b5a4d065f38f35d69bcd627ec5a7f8330caaffected
LinuxLinux3.12affected
LinuxLinux0 < 3.12unaffected
LinuxLinux5.4.244 <= 5.4.*unaffected
LinuxLinux5.10.181 <= 5.10.*unaffected
LinuxLinux5.15.113 <= 5.15.*unaffected
LinuxLinux6.1.30 <= 6.1.*unaffected
LinuxLinux6.3.4 <= 6.3.*unaffected
LinuxLinux6.4 <= *unaffected

Weaknesses

References