Critical severity · published Dec 30, 2025
CVE-2023-54184
scsi: target: iscsit: Free cmds before session free
9.8
CVSS
0.6%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 47% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Linux · Linux
988e3a85463d9b6dabc681df3f8f131b23c19953 before 89f5055f9b0b57c7e7f02e32df95ef401f809b71; 988e3a85463d9b6dabc681df3f8f131b23c19953 before 4621e24c9257c6379343bf0c11b473817cf7edcd; 988e3a85463d9b6dabc681df3f8f131b23c19953 before 1911cca5916b6e106de7afa3ec0a38447158216c; 988e3a85463d9b6dabc681df3f8f131b23c19953 before a7a4def6c7046e090bb10c6d550fdeb487db98ba; 988e3a85463d9b6dabc681df3f8f131b23c19953 before 4ce221d295f53e6c6b835ab33181e735482c9aac; 988e3a85463d9b6dabc681df3f8f131b23c19953 before d8990b5a4d065f38f35d69bcd627ec5a7f8330ca; +1 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-54184
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-54184
git.kernel.org
https://git.kernel.org/stable/c/1911cca5916b6e106de7afa3ec0a38447158216c
git.kernel.org
https://git.kernel.org/stable/c/4621e24c9257c6379343bf0c11b473817cf7edcd
git.kernel.org
https://git.kernel.org/stable/c/4ce221d295f53e6c6b835ab33181e735482c9aac
git.kernel.org
https://git.kernel.org/stable/c/89f5055f9b0b57c7e7f02e32df95ef401f809b71
git.kernel.org
https://git.kernel.org/stable/c/a7a4def6c7046e090bb10c6d550fdeb487db98ba
git.kernel.org
https://git.kernel.org/stable/c/d8990b5a4d065f38f35d69bcd627ec5a7f8330ca
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