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CVE-2026-23193

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

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 5.10.250, 5.15.200, 6.1.163, 6.6.124, 6.12.70, and 1 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: total

Summary

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.

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: total

  3. Record last updated

Affected versions

  • Linux Linux

    From e48354ce078c079996f89d715dfa44814b4eba01 · fixed in 2b64015550a13bcc72910be0565548d9a754d46d; From e48354ce078c079996f89d715dfa44814b4eba01 · fixed in fd8b0900173307039d3a84644c2fee041a7ed4fb; From e48354ce078c079996f89d715dfa44814b4eba01 · fixed in d8dbdc146e9e9a976931b78715be2e91299049f9; From e48354ce078c079996f89d715dfa44814b4eba01 · fixed in 11ebafffce31efc6abeb28c509017976fc49f1ca; From e48354ce078c079996f89d715dfa44814b4eba01 · fixed in 41b86a9ec037bd3435d68dd3692f0891a207e7e7; From e48354ce078c079996f89d715dfa44814b4eba01 · fixed in 4530f4e4d0e6a207110b0ffed0c911bca43531a4; From e48354ce078c079996f89d715dfa44814b4eba01 · fixed in 84dc6037390b8607c5551047d3970336cb51ba9a

  • Linux Linux

    3.1

  • KernelLinux

    From 3.1.0 · fixed in 5.10.250; From 5.11.0 · fixed in 5.15.200; From 5.16.0 · fixed in 6.1.163; From 6.2.0 · fixed in 6.6.124; From 6.7.0 · fixed in 6.12.70; From 6.13.0 · fixed in 6.18.10

References 7

git.kernel.org