High 8.8Published Feb 14, 2026

CVE-2026-23193scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count()

Updated under an hour ago (Oct 28, 2026, 4:23 AM ET)

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In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count() In iscsit_dec_session_usage_count(), the function calls complete() while holding the sess->session_usage_lock. Similar to the connection usage count logic, the waiter signaled by complete() (e.g., in the session release path) may wake up and free the iscsit_session structure immediately. This creates a race condition where the current thread may attempt to execute spin_unlock_bh() on a session structure that has already been deallocated, resulting in a KASAN slab-use-after-free. To resolve this, release the session_usage_lock before calling complete() to ensure all dereferences of the sess pointer are finished before the waiter is allowed to proceed with deallocation.

CVSS: 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-416
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Modified
Record last updated: Oct 19, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from e48354ce078c079996f89d715dfa44814b4eba01 before 2b64015550a13bcc72910be0565548d9a754d46d; from e48354ce078c079996f89d715dfa44814b4eba01 before fd8b0900173307039d3a84644c2fee041a7ed4fb; from e48354ce078c079996f89d715dfa44814b4eba01 before d8dbdc146e9e9a976931b78715be2e91299049f9; from e48354ce078c079996f89d715dfa44814b4eba01 before 11ebafffce31efc6abeb28c509017976fc49f1ca; from e48354ce078c079996f89d715dfa44814b4eba01 before 41b86a9ec037bd3435d68dd3692f0891a207e7e7; from e48354ce078c079996f89d715dfa44814b4eba01 before 4530f4e4d0e6a207110b0ffed0c911bca43531a4; from e48354ce078c079996f89d715dfa44814b4eba01 before 84dc6037390b8607c5551047d3970336cb51ba9a	CNA record
linux linux_kernel linux:linux_kernel	from 3.1 before 5.10.250; from 5.11 before 5.15.200; from 5.16 before 6.1.163; from 6.2 before 6.6.124; from 6.7 before 6.12.70; from 6.13 before 6.18.10; 6.19; 6.19; and 4 more ranges	NVD

References

References

https://git.kernel.org/stable/c/2b64015550a13bcc72910be0565548d9a754d46d	patch
https://git.kernel.org/stable/c/fd8b0900173307039d3a84644c2fee041a7ed4fb	patch
https://git.kernel.org/stable/c/d8dbdc146e9e9a976931b78715be2e91299049f9	patch
https://git.kernel.org/stable/c/11ebafffce31efc6abeb28c509017976fc49f1ca	patch
https://git.kernel.org/stable/c/41b86a9ec037bd3435d68dd3692f0891a207e7e7	patch
https://git.kernel.org/stable/c/4530f4e4d0e6a207110b0ffed0c911bca43531a4	patch
https://git.kernel.org/stable/c/84dc6037390b8607c5551047d3970336cb51ba9a	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.