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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-23193
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-02-14 17:15:57 UTC
Updated2026-04-03 14:16:26 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.8 HIGH from [email protected]

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Problem Types: CWE-416

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1CNADECLARED8.8HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected e48354ce078c079996f89d715dfa44814b4eba01 2b64015550a13bcc72910be0565548d9a754d46d git Not specified
CNA Linux Linux affected e48354ce078c079996f89d715dfa44814b4eba01 fd8b0900173307039d3a84644c2fee041a7ed4fb git Not specified
CNA Linux Linux affected e48354ce078c079996f89d715dfa44814b4eba01 d8dbdc146e9e9a976931b78715be2e91299049f9 git Not specified
CNA Linux Linux affected e48354ce078c079996f89d715dfa44814b4eba01 11ebafffce31efc6abeb28c509017976fc49f1ca git Not specified
CNA Linux Linux affected e48354ce078c079996f89d715dfa44814b4eba01 41b86a9ec037bd3435d68dd3692f0891a207e7e7 git Not specified
CNA Linux Linux affected e48354ce078c079996f89d715dfa44814b4eba01 4530f4e4d0e6a207110b0ffed0c911bca43531a4 git Not specified
CNA Linux Linux affected e48354ce078c079996f89d715dfa44814b4eba01 84dc6037390b8607c5551047d3970336cb51ba9a git Not specified
CNA Linux Linux affected 3.1 Not specified
CNA Linux Linux unaffected 3.1 semver Not specified
CNA Linux Linux unaffected 5.10.250 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.200 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.163 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.124 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.70 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.10 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/fd8b0900173307039d3a84644c2fee041a7ed4fb 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/d8dbdc146e9e9a976931b78715be2e91299049f9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/41b86a9ec037bd3435d68dd3692f0891a207e7e7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/84dc6037390b8607c5551047d3970336cb51ba9a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/4530f4e4d0e6a207110b0ffed0c911bca43531a4 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/11ebafffce31efc6abeb28c509017976fc49f1ca 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/2b64015550a13bcc72910be0565548d9a754d46d 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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