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TI-2026-18653 Aliases CVE-2026-23216GHSA-jfq5-qg8x-7rmp

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

Priority LOW 35CWE-416Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Partial Red Hat: 36 fixed, 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat. Impact type from CWE-416 and the CVSS impact.

Summary

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().

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00142 3rd percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.10.250, 5.15.200, 6.1.163 +4Red Hat: 13 advisoriesRed Hat: 36 fixed, 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux3.1 and later5.10.250, 5.15.200, 6.1.163, 6.6.124, 6.12.70, 6.18.10, 6.19Patch availableCNA
  • Linux VendorLinux Affected 3.1 and later Fixed in 5.10.250, 5.15.200, 6.1.163, 6.6.124, 6.12.70, 6.18.10, 6.19 Patch available CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*3.1 to before 5.10.250; 5.11 to before 5.15.200; 5.16 to before 6.1.163; 6.2 to before 6.6.124; 6.7 to before 6.12.70; 6.13 to before 6.18.10VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*6.19 rc1VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*6.19 rc2VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*6.19 rc3VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*6.19 rc4VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:*6.19 rc5VulnerableLinux
cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:*6.19 rc6VulnerableLinux
  • cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 3.1 to before 5.10.250; 5.11 to before 5.15.200; 5.16 to before 6.1.163; 6.2 to before 6.6.124; 6.7 to before 6.12.70; 6.13 to before 6.18.10 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:* Versions 6.19 rc1 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:* Versions 6.19 rc2 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:* Versions 6.19 rc3 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:* Versions 6.19 rc4 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.19:rc5:*:*:*:*:*:* Versions 6.19 rc5 Vulnerable ·Linux
  • cpe:2.3:o:linux:linux_kernel:6.19:rc6:*:*:*:*:*:* Versions 6.19 rc6 Vulnerable ·Linux

Remediation

  • Fix · CNA Linux (Linux) Fixed in 5.10.250, 5.15.200, 6.1.163, 6.6.124, 6.12.70, 6.18.10, 6.19

Red Hat 13 advisories

  • RHSA-2026:36049 Released 2026-07-07 · Red Hat rating Important
    kernel-rt security, bug fix, and enhancement update
    • Red Hat Enterprise Linux NFV (v. 8) kernel-rt-4.18.0-553.139.1.rt7.480.el8_10, kernel-rt-core-4.18.0-553.139.1.rt7.480.el8_10, kernel-rt-debug-4.18.0-553.139.1.rt7.480.el8_10 +9
    • Red Hat Enterprise Linux RT (v. 8) kernel-rt-4.18.0-553.139.1.rt7.480.el8_10, kernel-rt-core-4.18.0-553.139.1.rt7.480.el8_10, kernel-rt-debug-4.18.0-553.139.1.rt7.480.el8_10 +7
  • RHSA-2026:33743 Released 2026-06-30 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS (v. 8) bpftool-4.18.0-553.139.1.el8_10, kernel-4.18.0-553.139.1.el8_10, kernel-abi-stablelists-4.18.0-553.139.1.el8_10 +19
    • Red Hat Enterprise Linux CRB (v. 8) kernel-tools-libs-devel-4.18.0-553.139.1.el8_10
  • RHSA-2026:26535 Released 2026-06-17 · Red Hat rating Critical
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.4) bpftool-4.18.0-305.194.1.el8_4, kernel-4.18.0-305.194.1.el8_4, kernel-abi-stablelists-4.18.0-305.194.1.el8_4 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4) bpftool-4.18.0-305.194.1.el8_4, kernel-4.18.0-305.194.1.el8_4, kernel-abi-stablelists-4.18.0-305.194.1.el8_4 +14
Show 10 more Red Hat advisories
  • RHSA-2026:26515 Released 2026-06-17 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.2) kernel-64k-debug-devel-5.14.0-284.176.1.el9_2, kernel-64k-debug-devel-matched-5.14.0-284.176.1.el9_2, kernel-64k-devel-5.14.0-284.176.1.el9_2 +10
    • Red Hat Enterprise Linux BaseOS E4S (v.9.2) bpftool-7.0.0-284.176.1.el9_2, kernel-5.14.0-284.176.1.el9_2, kernel-64k-5.14.0-284.176.1.el9_2 +29
  • RHSA-2026:26462 Released 2026-06-17 · Red Hat rating Important
    kernel-rt security update
    • Red Hat Enterprise Linux Real Time E4S (v.9.2) kernel-rt-5.14.0-284.176.1.rt14.461.el9_2, kernel-rt-core-5.14.0-284.176.1.rt14.461.el9_2, kernel-rt-debug-5.14.0-284.176.1.rt14.461.el9_2 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2) kernel-rt-5.14.0-284.176.1.rt14.461.el9_2, kernel-rt-core-5.14.0-284.176.1.rt14.461.el9_2, kernel-rt-debug-5.14.0-284.176.1.rt14.461.el9_2 +11
  • RHSA-2026:25533 Released 2026-06-12 · Red Hat rating Critical
    kernel security update
    • Red Hat Enterprise Linux BaseOS AUS (v.8.6) bpftool-4.18.0-372.195.1.el8_6, kernel-4.18.0-372.195.1.el8_6, kernel-abi-stablelists-4.18.0-372.195.1.el8_6 +14
    • Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6) bpftool-4.18.0-372.195.1.el8_6, kernel-4.18.0-372.195.1.el8_6, kernel-abi-stablelists-4.18.0-372.195.1.el8_6 +14
  • RHSA-2026:25218 Released 2026-06-11 · Red Hat rating Important
    kernel security update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) kernel-tools-libs-devel-5.14.0-570.120.1.el9_6, libperf-5.14.0-570.120.1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) kernel-64k-debug-devel-5.14.0-570.120.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.120.1.el9_6, kernel-64k-devel-5.14.0-570.120.1.el9_6 +12
    • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel-5.14.0-570.120.1.el9_6, kernel-64k-5.14.0-570.120.1.el9_6, kernel-64k-core-5.14.0-570.120.1.el9_6 +28
    • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt-5.14.0-570.120.1.el9_6, kernel-rt-64k-5.14.0-570.120.1.el9_6, kernel-rt-64k-core-5.14.0-570.120.1.el9_6 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt-5.14.0-570.120.1.el9_6, kernel-rt-core-5.14.0-570.120.1.el9_6, kernel-rt-debug-5.14.0-570.120.1.el9_6 +11
  • RHSA-2026:25217 Released 2026-06-11 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-687.15.1.el9_8, kernel-64k-debug-devel-matched-5.14.0-687.15.1.el9_8, kernel-64k-devel-5.14.0-687.15.1.el9_8 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-687.15.1.el9_8, kernel-64k-5.14.0-687.15.1.el9_8, kernel-64k-core-5.14.0-687.15.1.el9_8 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-687.15.1.el9_8, libperf-5.14.0-687.15.1.el9_8
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-687.15.1.el9_8, kernel-rt-64k-5.14.0-687.15.1.el9_8, kernel-rt-64k-core-5.14.0-687.15.1.el9_8 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-687.15.1.el9_8, kernel-rt-core-5.14.0-687.15.1.el9_8, kernel-rt-debug-5.14.0-687.15.1.el9_8 +9
  • RHSA-2026:22964 Released 2026-06-04 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux BaseOS E4S (v.8.8) bpftool-4.18.0-477.145.1.el8_8, kernel-4.18.0-477.145.1.el8_8, kernel-abi-stablelists-4.18.0-477.145.1.el8_8 +14
    • Red Hat Enterprise Linux BaseOS TUS (v.8.8) bpftool-4.18.0-477.145.1.el8_8, kernel-4.18.0-477.145.1.el8_8, kernel-abi-stablelists-4.18.0-477.145.1.el8_8 +14
  • RHSA-2026:23237 Released 2026-06-04 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream E4S (v.9.4) kernel-64k-debug-devel-5.14.0-427.129.1.el9_4, kernel-64k-debug-devel-matched-5.14.0-427.129.1.el9_4, kernel-64k-devel-5.14.0-427.129.1.el9_4 +11
    • Red Hat Enterprise Linux BaseOS E4S (v.9.4) bpftool-7.3.0-427.129.1.el9_4, kernel-5.14.0-427.129.1.el9_4, kernel-64k-5.14.0-427.129.1.el9_4 +29
    • Red Hat Enterprise Linux Real Time E4S (v.9.4) kernel-rt-5.14.0-427.129.1.el9_4, kernel-rt-core-5.14.0-427.129.1.el9_4, kernel-rt-debug-5.14.0-427.129.1.el9_4 +9
    • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4) kernel-rt-5.14.0-427.129.1.el9_4, kernel-rt-core-5.14.0-427.129.1.el9_4, kernel-rt-debug-5.14.0-427.129.1.el9_4 +11
  • RHSA-2026:10756 Released 2026-04-27 · Red Hat rating Moderate
    kernel-rt security update
    • Red Hat Enterprise Linux for Real Time (v. 7 ELS) kernel-rt-3.10.0-1160.148.1.rt56.1300.el7, kernel-rt-debug-3.10.0-1160.148.1.rt56.1300.el7, kernel-rt-debug-devel-3.10.0-1160.148.1.rt56.1300.el7 +4
  • RHSA-2026:9870 Released 2026-04-22 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux Server (v. 7 ELS) bpftool-3.10.0-1160.148.1.el7, kernel-3.10.0-1160.148.1.el7, kernel-abi-whitelists-3.10.0-1160.148.1.el7 +11
    • Red Hat Enterprise Linux Server Optional (v. 7 ELS) kernel-debug-devel-3.10.0-1160.148.1.el7, kernel-tools-libs-devel-3.10.0-1160.148.1.el7
  • RHSA-2026:9095 Released 2026-04-20 · Red Hat rating Moderate
    kernel security update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) kernel-64k-debug-devel-6.12.0-55.69.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.69.1.el10_0, kernel-64k-devel-6.12.0-55.69.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel-6.12.0-55.69.1.el10_0, kernel-64k-6.12.0-55.69.1.el10_0, kernel-64k-core-6.12.0-55.69.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) kernel-tools-libs-devel-6.12.0-55.69.1.el10_0, libperf-6.12.0-55.69.1.el10_0
    • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt-6.12.0-55.69.1.el10_0, kernel-rt-64k-6.12.0-55.69.1.el10_0, kernel-rt-64k-core-6.12.0-55.69.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt-6.12.0-55.69.1.el10_0, kernel-rt-core-6.12.0-55.69.1.el10_0, kernel-rt-debug-6.12.0-55.69.1.el10_0 +11

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat Enterprise Linux 10AffectedNo fix planned: Will not fix
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.9.6)Fixed RHSA-2026:25218
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:25217
Red Hat Enterprise Linux AppStream E4S (v.9.2)Fixed RHSA-2026:26515
Red Hat Enterprise Linux AppStream E4S (v.9.4)Fixed RHSA-2026:23237
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:9095
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:25218
Red Hat Enterprise Linux BaseOS (v. 8)Fixed RHSA-2026:33743
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:25217
Red Hat Enterprise Linux BaseOS AUS (v.8.4)Fixed RHSA-2026:26535
Red Hat Enterprise Linux BaseOS AUS (v.8.6)Fixed RHSA-2026:25533
Red Hat Enterprise Linux BaseOS E4S (v.8.8)Fixed RHSA-2026:22964
Red Hat Enterprise Linux BaseOS E4S (v.9.2)Fixed RHSA-2026:26515
Red Hat Enterprise Linux BaseOS E4S (v.9.4)Fixed RHSA-2026:23237
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)Fixed RHSA-2026:9095
Red Hat Enterprise Linux BaseOS EUS (v.9.6)Fixed RHSA-2026:25218
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.4)Fixed RHSA-2026:26535
Red Hat Enterprise Linux BaseOS EUS EXTENSION (v.8.6)Fixed RHSA-2026:25533
Red Hat Enterprise Linux BaseOS TUS (v.8.8)Fixed RHSA-2026:22964
Red Hat Enterprise Linux CRB (v. 8)Fixed RHSA-2026:33743
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:25217
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:9095
Red Hat Enterprise Linux NFV (v. 8)Fixed RHSA-2026:36049
Red Hat Enterprise Linux RT (v. 8)Fixed RHSA-2026:36049
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2026:25217
Red Hat Enterprise Linux Real Time E4S (v.9.2)Fixed RHSA-2026:26462
Red Hat Enterprise Linux Real Time E4S (v.9.4)Fixed RHSA-2026:23237
Red Hat Enterprise Linux Real Time EUS (v. 10.0)Fixed RHSA-2026:9095
Red Hat Enterprise Linux Real Time EUS (v.9.6)Fixed RHSA-2026:25218
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2026:25217
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.2)Fixed RHSA-2026:26462
Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4)Fixed RHSA-2026:23237
Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)Fixed RHSA-2026:9095
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6)Fixed RHSA-2026:25218
Red Hat Enterprise Linux Server (v. 7 ELS)Fixed RHSA-2026:9870
Red Hat Enterprise Linux Server Optional (v. 7 ELS)Fixed RHSA-2026:9870
Red Hat Enterprise Linux for Real Time (v. 7 ELS)Fixed RHSA-2026:10756
Not affected: 1 product
  • Red Hat Enterprise Linux 6

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-23216
  2. 2026-10-03 Alias added: GHSA-jfq5-qg8x-7rmp
  3. 2026-10-19 Weakness changed · CISA ADP

References

Patch 7

  • TI-2025-26358 tls: fix handling of zero-length records on the rx_list KEVCVSS 3.1CRITICAL 9.8
  • TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
  • TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
  • TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
  • TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
  • TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
See all 15278 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences