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

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于iscsit_dec_session_usage_count函数存在释放后重用，可能导致内核崩溃。

CVSS 8.8 · High EPSS 0.36% · P29

Possible ATT&CK Techniques 1 AI

T1055 · Process Injection

Affected Version Matrix 16

VendorProduct Version RangeStatus
Linux Linux e48354ce078c079996f89d715dfa44814b4eba01< 2b64015550a13bcc72910be0565548d9a754d46d affected
e48354ce078c079996f89d715dfa44814b4eba01< fd8b0900173307039d3a84644c2fee041a7ed4fb affected
e48354ce078c079996f89d715dfa44814b4eba01< d8dbdc146e9e9a976931b78715be2e91299049f9 affected
e48354ce078c079996f89d715dfa44814b4eba01< 11ebafffce31efc6abeb28c509017976fc49f1ca affected
e48354ce078c079996f89d715dfa44814b4eba01< 41b86a9ec037bd3435d68dd3692f0891a207e7e7 affected
e48354ce078c079996f89d715dfa44814b4eba01< 4530f4e4d0e6a207110b0ffed0c911bca43531a4 affected
e48354ce078c079996f89d715dfa44814b4eba01< 84dc6037390b8607c5551047d3970336cb51ba9a affected
3.1 affected
… +8 more rows
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I. Basic Information for CVE-2026-23193

Vulnerability Information
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Vulnerability Title
scsi: target: iscsi: Fix use-after-free in iscsit_dec_session_usage_count()
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于iscsit_dec_session_usage_count函数存在释放后重用，可能导致内核崩溃。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux e48354ce078c079996f89d715dfa44814b4eba01 ~ 2b64015550a13bcc72910be0565548d9a754d46d -
Linux Linux 3.1 -

II. Public POCs for CVE-2026-23193

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III. Intelligence Information for CVE-2026-23193

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Same Patch Batch · Linux · 2026-02-14 · 108 CVEs total

CVE-2025-71202 8.8 HIGH iommu/sva: invalidate stale IOTLB entries for kernel address space
CVE-2026-23172 8.4 HIGH net: wwan: t7xx: fix potential skb->frags overflow in RX path
CVE-2026-23209 7.8 HIGH macvlan: fix error recovery in macvlan_common_newlink()
CVE-2026-23169 7.8 HIGH mptcp: fix race in mptcp_pm_nl_flush_addrs_doit()
CVE-2026-23171 7.8 HIGH bonding: fix use-after-free due to enslave fail after slave array update
CVE-2025-71221 7.8 HIGH dmaengine: mmp_pdma: Fix race condition in mmp_pdma_residue()
CVE-2026-23178 7.8 HIGH HID: i2c-hid: fix potential buffer overflow in i2c_hid_get_report()
CVE-2026-23184 7.8 HIGH binder: fix UAF in binder_netlink_report()
CVE-2026-23185 7.8 HIGH wifi: iwlwifi: mld: cancel mlo_scan_start_wk
CVE-2026-23191 7.8 HIGH ALSA: aloop: Fix racy access at PCM trigger
CVE-2026-23192 7.8 HIGH linkwatch: use __dev_put() in callers to prevent UAF
CVE-2026-23198 7.8 HIGH KVM: Don't clobber irqfd routing type when deassigning irqfd
CVE-2026-23139 7.5 HIGH netfilter: nf_conncount: update last_gc only when GC has been performed
CVE-2025-71204 7.5 HIGH smb/server: fix refcount leak in parse_durable_handle_context()
CVE-2026-23148 7.5 HIGH nvmet: fix race in nvmet_bio_done() leading to NULL pointer dereference
CVE-2026-23136 7.5 HIGH libceph: reset sparse-read state in osd_fault()
CVE-2026-23161 7.3 HIGH mm/shmem, swap: fix race of truncate and swap entry split
CVE-2025-71201 7.1 HIGH netfs: Fix early read unlock of page with EOF in middle
CVE-2026-23204 7.1 HIGH net/sched: cls_u32: use skb_header_pointer_careful()
CVE-2026-23195 7.0 HIGH cgroup/dmem: avoid pool UAF

Showing top 20 of 108 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-23193

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