CVE-2023-54184

scsi: target: iscsit: Free cmds before session free

State: Published
Severity: 9.8 Critical
Published: Dec 30, 2025
Updated: Aug 5, 2026
Reserved: Dec 30, 2025

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	Linux

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	988e3a85463d9b6dabc681df3f8f131b23c19953 to before 89f5055f9b0b57c7e7f02e32df95ef401f809b71Affected 988e3a85463d9b6dabc681df3f8f131b23c19953 to before 4621e24c9257c6379343bf0c11b473817cf7edcdAffected 988e3a85463d9b6dabc681df3f8f131b23c19953 to before 1911cca5916b6e106de7afa3ec0a38447158216cAffected 988e3a85463d9b6dabc681df3f8f131b23c19953 to before a7a4def6c7046e090bb10c6d550fdeb487db98baAffected 988e3a85463d9b6dabc681df3f8f131b23c19953 to before 4ce221d295f53e6c6b835ab33181e735482c9aacAffected 988e3a85463d9b6dabc681df3f8f131b23c19953 to before d8990b5a4d065f38f35d69bcd627ec5a7f8330caAffected
LinuxLinux	3.12Affected before 3.12Not affected 5.4.244 through 5.4.Not affected 5.10.181 through 5.10.Not affected 5.15.113 through 5.15.Not affected 6.1.30 through 6.1.Not affected 6.3.4 through 6.3.*Not affected 6.4 and laterNot affected

Product

Versions

LinuxLinux

988e3a85463d9b6dabc681df3f8f131b23c19953 to before 89f5055f9b0b57c7e7f02e32df95ef401f809b71Affected
988e3a85463d9b6dabc681df3f8f131b23c19953 to before 4621e24c9257c6379343bf0c11b473817cf7edcdAffected
988e3a85463d9b6dabc681df3f8f131b23c19953 to before 1911cca5916b6e106de7afa3ec0a38447158216cAffected
988e3a85463d9b6dabc681df3f8f131b23c19953 to before a7a4def6c7046e090bb10c6d550fdeb487db98baAffected
988e3a85463d9b6dabc681df3f8f131b23c19953 to before 4ce221d295f53e6c6b835ab33181e735482c9aacAffected
988e3a85463d9b6dabc681df3f8f131b23c19953 to before d8990b5a4d065f38f35d69bcd627ec5a7f8330caAffected

LinuxLinux

3.12Affected
before 3.12Not affected
5.4.244 through 5.4.*Not affected
5.10.181 through 5.10.*Not affected
5.15.113 through 5.15.*Not affected
6.1.30 through 6.1.*Not affected
6.3.4 through 6.3.*Not affected
6.4 and laterNot affected

References

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