{"id":"CVE-2026-23193","title":"scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count()\n\nIn iscsit_dec_session_usage_count(), the function calls complete() while\nholding the sess->…","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= e48354ce078c079996f89d715dfa44814b4eba01 < 2b64015550a13bcc72910be0565548d9a754d46d","Linux >= e48354ce078c079996f89d715dfa44814b4eba01 < fd8b0900173307039d3a84644c2fee041a7ed4fb","Linux >= e48354ce078c079996f89d715dfa44814b4eba01 < d8dbdc146e9e9a976931b78715be2e91299049f9","Linux >= e48354ce078c079996f89d715dfa44814b4eba01 < 11ebafffce31efc6abeb28c509017976fc49f1ca","Linux >= e48354ce078c079996f89d715dfa44814b4eba01 < 41b86a9ec037bd3435d68dd3692f0891a207e7e7","Linux >= e48354ce078c079996f89d715dfa44814b4eba01 < 4530f4e4d0e6a207110b0ffed0c911bca43531a4","Linux >= e48354ce078c079996f89d715dfa44814b4eba01 < 84dc6037390b8607c5551047d3970336cb51ba9a","Linux 3.1"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-06-16T20:19:30.330319Z"},"published":"2026-02-14","updated":"2026-10-19","sourceUpdated":"2026-10-19T18:25:34.873Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-23193","references":[{"url":"https://git.kernel.org/stable/c/2b64015550a13bcc72910be0565548d9a754d46d"},{"url":"https://git.kernel.org/stable/c/fd8b0900173307039d3a84644c2fee041a7ed4fb"},{"url":"https://git.kernel.org/stable/c/d8dbdc146e9e9a976931b78715be2e91299049f9"},{"url":"https://git.kernel.org/stable/c/11ebafffce31efc6abeb28c509017976fc49f1ca"},{"url":"https://git.kernel.org/stable/c/41b86a9ec037bd3435d68dd3692f0891a207e7e7"},{"url":"https://git.kernel.org/stable/c/4530f4e4d0e6a207110b0ffed0c911bca43531a4"},{"url":"https://git.kernel.org/stable/c/84dc6037390b8607c5551047d3970336cb51ba9a"}],"tags":["cve.org"],"epss":0.00282,"epssPercentile":0.19414,"ingestedAt":"2026-10-19T18:35:50.096Z","slug":"CVE-2026-23193","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nscsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count()\n\nIn iscsit_dec_session_usage_count(), the function calls complete() while\nholding the sess->session_usage_lock. Similar to the connection usage count\nlogic, the waiter signaled by complete() (e.g., in the session release\npath) may wake up and free the iscsit_session structure immediately.\n\nThis creates a race condition where the current thread may attempt to\nexecute spin_unlock_bh() on a session structure that has already been\ndeallocated, resulting in a KASAN slab-use-after-free.\n\nTo resolve this, release the session_usage_lock before calling complete()\nto ensure all dereferences of the sess pointer are finished before the\nwaiter is allowed to proceed with deallocation.\n\n## Affected\n\n- `Linux >= e48354ce078c079996f89d715dfa44814b4eba01 < 2b64015550a13bcc72910be0565548d9a754d46d`\n- `Linux >= e48354ce078c079996f89d715dfa44814b4eba01 < fd8b0900173307039d3a84644c2fee041a7ed4fb`\n- `Linux >= e48354ce078c079996f89d715dfa44814b4eba01 < d8dbdc146e9e9a976931b78715be2e91299049f9`\n- `Linux >= e48354ce078c079996f89d715dfa44814b4eba01 < 11ebafffce31efc6abeb28c509017976fc49f1ca`\n- `Linux >= e48354ce078c079996f89d715dfa44814b4eba01 < 41b86a9ec037bd3435d68dd3692f0891a207e7e7`\n- `Linux >= e48354ce078c079996f89d715dfa44814b4eba01 < 4530f4e4d0e6a207110b0ffed0c911bca43531a4`\n- `Linux >= e48354ce078c079996f89d715dfa44814b4eba01 < 84dc6037390b8607c5551047d3970336cb51ba9a`\n- `Linux 3.1`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":48,"depthScoreParts":{"impact":48.4,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}