Vulnerability · Published Feb 18, 2026 · Assigned by Linux

CVE-2026-23216scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count()

High 7.8

In plain English

A high-severity use-after-free in Linux from Linux. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS NVD)7.8High
Exploit odds (30 days)0.1%top 96.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

In the Linux kernel, the following vulnerability has been resolved: scsi: target: iscsi: Fix use-after-free in iscsit_dec_conn_usage_count() In iscsit_dec_conn_usage_count(), the function calls complete() while holding the conn->conn_usage_lock. As soon as complete() is invoked, the waiter (such as iscsit_close_connection()) may wake up and proceed to free the iscsit_conn structure. If the waiter frees the memory before the current thread reaches spin_unlock_bh(), it results in a KASAN slab-use-after-free as the function attempts to release a lock within the already-freed connection structure. Fix this by releasing the spinlock before calling complete().

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
AlmaLinux:8bpftool4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:8kernel4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:9kernel5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-64k5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-64k-core5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-64k-debug5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-64k-debug-core5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-64k-debug-devel5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-64k-debug-devel-matched5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-64k-debug-modules5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-64k-debug-modules-core5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-64k-debug-modules-extra5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-64k-devel5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-64k-devel-matched5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-64k-modules5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-64k-modules-core5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-64k-modules-extra5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-abi-stablelists4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:9kernel-abi-stablelists5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-core4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:9kernel-core5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-cross-headers4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:9kernel-cross-headers5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-debug4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:9kernel-debug5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-debug-core4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:9kernel-debug-core5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-debug-devel4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:9kernel-debug-devel5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-debug-devel-matched5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-debug-modules4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:9kernel-debug-modules5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-debug-modules-core5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-debug-modules-extra4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:9kernel-debug-modules-extra5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-debug-uki-virt5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-devel4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:9kernel-devel5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-devel-matched5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-doc4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:9kernel-doc5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-headers4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:9kernel-headers5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-modules4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:9kernel-modules5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-modules-core5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-modules-extra4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:9kernel-modules-extra5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-rt4.18.0-553.139.1.rt7.480.el8_10ALSA-2026:36049
AlmaLinux:9kernel-rt5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-rt-64k5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-rt-64k-core5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-rt-64k-debug5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-rt-64k-debug-core5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-rt-64k-debug-devel5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-rt-64k-debug-modules5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-rt-64k-debug-modules-core5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-rt-64k-debug-modules-extra5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-rt-64k-devel5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-rt-64k-modules5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-rt-64k-modules-core5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-rt-64k-modules-extra5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-rt-core4.18.0-553.139.1.rt7.480.el8_10ALSA-2026:36049
AlmaLinux:9kernel-rt-core5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-rt-debug4.18.0-553.139.1.rt7.480.el8_10ALSA-2026:36049
AlmaLinux:9kernel-rt-debug5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-rt-debug-core4.18.0-553.139.1.rt7.480.el8_10ALSA-2026:36049
AlmaLinux:9kernel-rt-debug-core5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-rt-debug-devel4.18.0-553.139.1.rt7.480.el8_10ALSA-2026:36049
AlmaLinux:9kernel-rt-debug-devel5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-rt-debug-modules4.18.0-553.139.1.rt7.480.el8_10ALSA-2026:36049
AlmaLinux:9kernel-rt-debug-modules5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-rt-debug-modules-core5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-rt-debug-modules-extra4.18.0-553.139.1.rt7.480.el8_10ALSA-2026:36049
AlmaLinux:9kernel-rt-debug-modules-extra5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-rt-devel4.18.0-553.139.1.rt7.480.el8_10ALSA-2026:36049
AlmaLinux:9kernel-rt-devel5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-rt-modules4.18.0-553.139.1.rt7.480.el8_10ALSA-2026:36049
AlmaLinux:9kernel-rt-modules5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-rt-modules-core5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-rt-modules-extra4.18.0-553.139.1.rt7.480.el8_10ALSA-2026:36049
AlmaLinux:9kernel-rt-modules-extra5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-tools4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:9kernel-tools5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-tools-libs4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:9kernel-tools-libs5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-tools-libs-devel4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:9kernel-tools-libs-devel5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-uki-virt5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-uki-virt-addons5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-zfcpdump4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:9kernel-zfcpdump5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-zfcpdump-core4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:9kernel-zfcpdump-core5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-zfcpdump-devel4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:9kernel-zfcpdump-devel5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-zfcpdump-devel-matched5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-zfcpdump-modules4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:9kernel-zfcpdump-modules5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9kernel-zfcpdump-modules-core5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8kernel-zfcpdump-modules-extra4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:9kernel-zfcpdump-modules-extra5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9libperf5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8perf4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:9perf5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:8python3-perf4.18.0-553.139.1.el8_10ALSA-2026:33743
AlmaLinux:9python3-perf5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9rtla5.14.0-687.15.1.el9_8ALSA-2026:25217
AlmaLinux:9rv5.14.0-687.15.1.el9_8ALSA-2026:25217
Debian:12linux6.1.164-1DEBIAN-CVE-2026-23216
Debian:12linux6.1.164-1DSA-6163-1
Debian:13linux6.12.73-1DEBIAN-CVE-2026-23216
Debian:13linux6.12.73-1DSA-6141-1
Debian:14linux6.18.10-1DEBIAN-CVE-2026-23216
Rocky Linux:9kernel0:5.14.0-687.15.1.el9_7.cloud.1.0RXSA-2026:25217
Rocky Linux:9kernel0:5.14.0-687.15.1.el9_8RLSA-2026:25217
Ubuntu:22.04:LTSlinux5.15.0-185.195UBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux5.15.0-185.195USN-8493-1
Ubuntu:24.04:LTSlinux6.8.0-117.117UBUNTU-CVE-2026-23216
Ubuntu:25.10linuxno fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-allwinner-5.19no fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-aws5.15.0-1111.118USN-8493-1
Ubuntu:22.04:LTSlinux-aws5.15.0-1111.118UBUNTU-CVE-2026-23216
Ubuntu:24.04:LTSlinux-aws6.8.0-1055.58UBUNTU-CVE-2026-23216
Ubuntu:25.10linux-awsno fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-aws-5.19no fix listedUBUNTU-CVE-2026-23216
Ubuntu:24.04:LTSlinux-aws-6.14no fix listedUBUNTU-CVE-2026-23216
Ubuntu:24.04:LTSlinux-aws-6.17no fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-aws-6.2no fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-aws-6.5no fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-aws-6.86.8.0-1057.60~22.04.1UBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-azure5.15.0-1116.125USN-8493-1
Ubuntu:22.04:LTSlinux-azure5.15.0-1116.125UBUNTU-CVE-2026-23216
Ubuntu:24.04:LTSlinux-azure6.8.0-1056.62UBUNTU-CVE-2026-23216
Ubuntu:25.10linux-azureno fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-azure-5.19no fix listedUBUNTU-CVE-2026-23216
Ubuntu:24.04:LTSlinux-azure-6.11no fix listedUBUNTU-CVE-2026-23216
Ubuntu:24.04:LTSlinux-azure-6.14no fix listedUBUNTU-CVE-2026-23216
Ubuntu:24.04:LTSlinux-azure-6.17no fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-azure-6.2no fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-azure-6.5no fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-azure-6.86.8.0-1059.65~22.04.1UBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-azure-fde5.15.0-1116.125UBUNTU-CVE-2026-23216
Ubuntu:24.04:LTSlinux-azure-fde6.8.0-1058.65UBUNTU-CVE-2026-23216
Ubuntu:25.10linux-azure-fdeno fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-azure-fde-5.19no fix listedUBUNTU-CVE-2026-23216
Ubuntu:24.04:LTSlinux-azure-fde-6.14no fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-azure-fde-6.2no fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-azure-fde-6.86.8.0-1058.65~22.04.1UBUNTU-CVE-2026-23216
Ubuntu:24.04:LTSlinux-azure-nvidiano fix listedUBUNTU-CVE-2026-23216
Ubuntu:24.04:LTSlinux-azure-nvidia-6.14no fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-gcp5.15.0-1111.121UBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-gcp5.15.0-1111.121USN-8493-1
Ubuntu:24.04:LTSlinux-gcp6.8.0-1058.61UBUNTU-CVE-2026-23216
Ubuntu:25.10linux-gcpno fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-gcp-5.19no fix listedUBUNTU-CVE-2026-23216
Ubuntu:24.04:LTSlinux-gcp-6.11no fix listedUBUNTU-CVE-2026-23216
Ubuntu:24.04:LTSlinux-gcp-6.14no fix listedUBUNTU-CVE-2026-23216
Ubuntu:24.04:LTSlinux-gcp-6.17no fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-gcp-6.2no fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-gcp-6.5no fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-gcp-6.86.8.0-1060.63~22.04.1UBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-gke5.15.0-1107.113USN-8493-1
Ubuntu:22.04:LTSlinux-gke5.15.0-1107.113UBUNTU-CVE-2026-23216
Ubuntu:24.04:LTSlinux-gke6.8.0-1054.60UBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1094.102UBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-gkeop5.15.0-1094.102USN-8493-1
Ubuntu:24.04:LTSlinux-gkeop6.8.0-1041.44UBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-hwe-5.19no fix listedUBUNTU-CVE-2026-23216
Ubuntu:24.04:LTSlinux-hwe-6.11no fix listedUBUNTU-CVE-2026-23216
Ubuntu:24.04:LTSlinux-hwe-6.14no fix listedUBUNTU-CVE-2026-23216
Ubuntu:24.04:LTSlinux-hwe-6.17no fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-hwe-6.2no fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-hwe-6.5no fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-hwe-6.86.8.0-124.124~22.04.1UBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-ibm5.15.0-1105.109UBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-ibm5.15.0-1105.109USN-8493-1
Ubuntu:24.04:LTSlinux-ibm6.8.0-1055.56UBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-ibm-6.86.8.0-1055.56~22.04.1UBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-intel-iot-realtimeno fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1106.112USN-8493-1
Ubuntu:22.04:LTSlinux-intel-iotg5.15.0-1106.112UBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-kvm5.15.0-1103.108UBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-kvm5.15.0-1103.108USN-8493-1
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-183.193USN-8493-1
Ubuntu:22.04:LTSlinux-lowlatency5.15.0-183.193UBUNTU-CVE-2026-23216
Ubuntu:24.04:LTSlinux-lowlatency6.8.0-117.117.1UBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-lowlatency-hwe-5.19no fix listedUBUNTU-CVE-2026-23216
Ubuntu:24.04:LTSlinux-lowlatency-hwe-6.11no fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.2no fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.5no fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-lowlatency-hwe-6.86.8.0-117.117.1~22.04.1UBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1106.107UBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-nvidia5.15.0-1106.107USN-8493-1
Ubuntu:24.04:LTSlinux-nvidia6.8.0-1054.57UBUNTU-CVE-2026-23216
Ubuntu:24.04:LTSlinux-nvidia-6.11no fix listedUBUNTU-CVE-2026-23216
Ubuntu:24.04:LTSlinux-nvidia-6.17no fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-nvidia-6.2no fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-nvidia-6.5no fix listedUBUNTU-CVE-2026-23216
Ubuntu:22.04:LTSlinux-nvidia-6.86.8.0-1054.57~22.04.1UBUNTU-CVE-2026-23216

Affected products (as reported)

VendorProductVersions
Linux Linux e48354ce078c079996f89d715dfa44814b4eba01 – before ba684191437380a07b27666eb4e72748be1ea201e48354ce078c079996f89d715dfa44814b4eba01 – before 8518f072fc92921418cd9ed4268dd4f3e9a8fd75e48354ce078c079996f89d715dfa44814b4eba01 – before 275016a551ba1a068a3bd6171b18611726b67110e48354ce078c079996f89d715dfa44814b4eba01 – before 73b487d44bf4f92942629d578381f89c326ff77fe48354ce078c079996f89d715dfa44814b4eba01 – before 48fe983e92de2c59d143fe38362ad17ba23ec7f3e48354ce078c079996f89d715dfa44814b4eba01 – before 3835e49e146a4e6e7787b29465f1a23379b6ec44e48354ce078c079996f89d715dfa44814b4eba01 – before 9411a89e9e7135cc459178fa77a3f1d6191ae903
Linux Linux 3.1

Weakness: CWE-416

References