CVE-2026-23193High· 8.8▾ TwilightIn 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->…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 48.4 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.3%
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.
Linux >= e48354ce078c079996f89d715dfa44814b4eba01 < 2b64015550a13bcc72910be0565548d9a754d46dLinux >= e48354ce078c079996f89d715dfa44814b4eba01 < fd8b0900173307039d3a84644c2fee041a7ed4fbLinux >= e48354ce078c079996f89d715dfa44814b4eba01 < d8dbdc146e9e9a976931b78715be2e91299049f9Linux >= e48354ce078c079996f89d715dfa44814b4eba01 < 11ebafffce31efc6abeb28c509017976fc49f1caLinux >= e48354ce078c079996f89d715dfa44814b4eba01 < 41b86a9ec037bd3435d68dd3692f0891a207e7e7Linux >= e48354ce078c079996f89d715dfa44814b4eba01 < 4530f4e4d0e6a207110b0ffed0c911bca43531a4Linux >= e48354ce078c079996f89d715dfa44814b4eba01 < 84dc6037390b8607c5551047d3970336cb51ba9aLinux 3.1Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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