9.8

CVE-2023-54184: scsi: target: iscsit: Free cmds before session free

Deferred
AliasesUBUNTU-CVE-2023-54184DEBIAN-CVE-2023-54184
Published 30-12-2025Last modified 05-08-2026

Vulnerability summary

CVE-2023-54184 is a critical (CVSS 9.8) vulnerability in linux. EPSS estimates a 0.57% chance of exploitation in the next 30 days, higher than 47.3% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 9.8 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 1% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.57%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 3 · Related 1
RHSA-2024:2394RHSA-2024:3138SUSE-SU-2026:1078-1

Timeline

  1. 30-12-2025
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

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 metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.57%

Chance of exploitation in the next 30 days

Percentile

47%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.57% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu124 products
  • linuxAll versions (No fix recorded) | < 5.4.0-162.179 | < 5.15.0-83.92
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.4.0-1109.118 | < 5.15.0-1044.49
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.37-1 | < 6.3.7-1
Linux1 product
  • linux≥ 988e3a85463d9b6dabc681df3f8f131b23c19953, < 89f5055f9b0b57c7e7f02e32df95ef401f809b71 | ≥ 988e3a85463d9b6dabc681df3f8f131b23c19953, < 4621e24c9257c6379343bf0c11b473817cf7edcd | ≥ 988e3a85463d9b6dabc681df3f8f131b23c19953, < 1911cca5916b6e106de7afa3ec0a38447158216c | ≥ 988e3a85463d9b6dabc681df3f8f131b23c19953, < a7a4def6c7046e090bb10c6d550fdeb487db98ba | ≥ 988e3a85463d9b6dabc681df3f8f131b23c19953, < 4ce221d295f53e6c6b835ab33181e735482c9aac | ≥ 988e3a85463d9b6dabc681df3f8f131b23c19953, < d8990b5a4d065f38f35d69bcd627ec5a7f8330ca | 3.12

3 vendors · 126 products

References

10 links