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TI-2026-18547 Aliases CVE-2026-23110GHSA-7p3h-gfr2-rwcv

scsi: core: Wake up the error handler when final completions race against each other

Priority LOW 20CWE-362Published · Updated

Key facts

Attack vector
Local
Privileges required
Low
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
None · None · High
Fix status
Partial Red Hat: 20 fixed, 3 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA and Red Hat.

Summary

In the Linux kernel, the following vulnerability has been resolved: scsi: core: Wake up the error handler when final completions race against each other The fragile ordering between marking commands completed or failed so that the error handler only wakes when the last running command completes or times out has race conditions. These race conditions can cause the SCSI layer to fail to wake the error handler, leaving I/O through the SCSI host stuck as the error state cannot advance. First, there is an memory ordering issue within scsi_dec_host_busy(). The write which clears SCMD_STATE_INFLIGHT may be reordered with reads counting in scsi_host_busy(). While the local CPU will see its own write, reordering can allow other CPUs in scsi_dec_host_busy() or scsi_eh_inc_host_failed() to see a raised busy count, causing no CPU to see a host busy equal to the host_failed count. This race condition can be prevented with a memory barrier on the error path to force the write to be visible before counting host busy commands. Second, there is a general ordering issue with scsi_eh_inc_host_failed(). By counting busy commands before incrementing host_failed, it can race with a final command in scsi_dec_host_busy(), such that scsi_dec_host_busy() does not see host_failed incremented but scsi_eh_inc_host_failed() counts busy commands before SCMD_STATE_INFLIGHT is cleared by scsi_dec_host_busy(), resulting in neither waking the error handler task. This needs the call to scsi_host_busy() to be moved after host_failed is incremented to close the race condition.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00113 1st percentileScored 2026-11-07
Fix Partial Linux (Linux): 5.10.249, 6.1.162, 6.6.122 +3Red Hat: 4 advisoriesRed Hat: 20 fixed, 3 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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

Affected products

VendorProductAffected versionsFixed inStatusSource
LinuxLinux5.5 and later5.10.249, 6.1.162, 6.6.122, 6.12.68, 6.18.8, 6.19Patch availableCNA
  • Linux VendorLinux Affected 5.5 and later Fixed in 5.10.249, 6.1.162, 6.6.122, 6.12.68, 6.18.8, 6.19 Patch available CNA

CPE configurations NVD · 7

CPEVersionsRoleVendor
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*5.5 to before 5.10.249; 5.11 to before 6.1.162; 6.2 to before 6.6.122; 6.7 to before 6.12.68; 6.13 to before 6.18.8VulnerableLinux
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 5.5 to before 5.10.249; 5.11 to before 6.1.162; 6.2 to before 6.6.122; 6.7 to before 6.12.68; 6.13 to before 6.18.8 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 5.10.249, 6.1.162, 6.6.122, 6.12.68, 6.18.8, 6.19

Red Hat 4 advisories

  • RHSA-2026:56574 Released 2026-08-19 · Red Hat rating Moderate
    kernel security, bug fix, and enhancement update
    • Red Hat CodeReady Linux Builder EUS (v.9.6) kernel-tools-libs-devel-5.14.0-570.135.1.el9_6, libperf-5.14.0-570.135.1.el9_6
    • Red Hat Enterprise Linux AppStream EUS (v.9.6) kernel-64k-debug-devel-5.14.0-570.135.1.el9_6, kernel-64k-debug-devel-matched-5.14.0-570.135.1.el9_6, kernel-64k-devel-5.14.0-570.135.1.el9_6 +12
    • Red Hat Enterprise Linux BaseOS EUS (v.9.6) kernel-5.14.0-570.135.1.el9_6, kernel-64k-5.14.0-570.135.1.el9_6, kernel-64k-core-5.14.0-570.135.1.el9_6 +28
    • Red Hat Enterprise Linux Real Time EUS (v.9.6) kernel-rt-5.14.0-570.135.1.el9_6, kernel-rt-64k-5.14.0-570.135.1.el9_6, kernel-rt-64k-core-5.14.0-570.135.1.el9_6 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6) kernel-rt-5.14.0-570.135.1.el9_6, kernel-rt-core-5.14.0-570.135.1.el9_6, kernel-rt-debug-5.14.0-570.135.1.el9_6 +11
  • RHSA-2026:55445 Released 2026-08-17 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream EUS (v. 10.0) kernel-64k-debug-devel-6.12.0-55.98.1.el10_0, kernel-64k-debug-devel-matched-6.12.0-55.98.1.el10_0, kernel-64k-devel-6.12.0-55.98.1.el10_0 +12
    • Red Hat Enterprise Linux BaseOS EUS (v. 10.0) kernel-6.12.0-55.98.1.el10_0, kernel-64k-6.12.0-55.98.1.el10_0, kernel-64k-core-6.12.0-55.98.1.el10_0 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0) kernel-tools-libs-devel-6.12.0-55.98.1.el10_0, libperf-6.12.0-55.98.1.el10_0
    • Red Hat Enterprise Linux Real Time EUS (v. 10.0) kernel-rt-6.12.0-55.98.1.el10_0, kernel-rt-64k-6.12.0-55.98.1.el10_0, kernel-rt-64k-core-6.12.0-55.98.1.el10_0 +21
    • Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0) kernel-rt-6.12.0-55.98.1.el10_0, kernel-rt-core-6.12.0-55.98.1.el10_0, kernel-rt-debug-6.12.0-55.98.1.el10_0 +11
  • RHSA-2026:45114 Released 2026-07-24 · Red Hat rating Important
    kernel security update
    • Red Hat Enterprise Linux AppStream (v. 10) kernel-64k-debug-devel-6.12.0-211.39.1.el10_2, kernel-64k-debug-devel-matched-6.12.0-211.39.1.el10_2, kernel-64k-devel-6.12.0-211.39.1.el10_2 +12
    • Red Hat Enterprise Linux BaseOS (v. 10) kernel-6.12.0-211.39.1.el10_2, kernel-64k-6.12.0-211.39.1.el10_2, kernel-64k-core-6.12.0-211.39.1.el10_2 +29
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 10) kernel-tools-libs-devel-6.12.0-211.39.1.el10_2, libperf-6.12.0-211.39.1.el10_2
    • Red Hat Enterprise Linux Real Time (v. 10) kernel-rt-6.12.0-211.39.1.el10_2, kernel-rt-64k-6.12.0-211.39.1.el10_2, kernel-rt-64k-core-6.12.0-211.39.1.el10_2 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 10) kernel-rt-6.12.0-211.39.1.el10_2, kernel-rt-core-6.12.0-211.39.1.el10_2, kernel-rt-debug-6.12.0-211.39.1.el10_2 +9
Show 1 more Red Hat advisories
  • RHSA-2026:43307 Released 2026-07-22 · Red Hat rating Important
    kernel security, bug fix, and enhancement update
    • Red Hat Enterprise Linux AppStream (v. 9) kernel-64k-debug-devel-5.14.0-687.29.1.el9_8, kernel-64k-debug-devel-matched-5.14.0-687.29.1.el9_8, kernel-64k-devel-5.14.0-687.29.1.el9_8 +12
    • Red Hat Enterprise Linux BaseOS (v. 9) kernel-5.14.0-687.29.1.el9_8, kernel-64k-5.14.0-687.29.1.el9_8, kernel-64k-core-5.14.0-687.29.1.el9_8 +28
    • Red Hat Enterprise Linux CodeReady Linux Builder (v. 9) kernel-tools-libs-devel-5.14.0-687.29.1.el9_8, libperf-5.14.0-687.29.1.el9_8
    • Red Hat Enterprise Linux Real Time (v. 9) kernel-rt-5.14.0-687.29.1.el9_8, kernel-rt-64k-5.14.0-687.29.1.el9_8, kernel-rt-64k-core-5.14.0-687.29.1.el9_8 +21
    • Red Hat Enterprise Linux Real Time for NFV (v. 9) kernel-rt-5.14.0-687.29.1.el9_8, kernel-rt-core-5.14.0-687.29.1.el9_8, kernel-rt-debug-5.14.0-687.29.1.el9_8 +9

Vendor assessments

Red Hat

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

ProductStatusPlan or fix
Red Hat Enterprise Linux 6AffectedNo fix planned: Out of support scope
Red Hat Enterprise Linux 8AffectedNo fix yet
Red Hat Enterprise Linux 9AffectedNo fix yet
Red Hat CodeReady Linux Builder EUS (v.9.6)Fixed RHSA-2026:56574
Red Hat Enterprise Linux AppStream (v. 10)Fixed RHSA-2026:45114
Red Hat Enterprise Linux AppStream (v. 9)Fixed RHSA-2026:43307
Red Hat Enterprise Linux AppStream EUS (v. 10.0)Fixed RHSA-2026:55445
Red Hat Enterprise Linux AppStream EUS (v.9.6)Fixed RHSA-2026:56574
Red Hat Enterprise Linux BaseOS (v. 10)Fixed RHSA-2026:45114
Red Hat Enterprise Linux BaseOS (v. 9)Fixed RHSA-2026:43307
Red Hat Enterprise Linux BaseOS EUS (v. 10.0)Fixed RHSA-2026:55445
Red Hat Enterprise Linux BaseOS EUS (v.9.6)Fixed RHSA-2026:56574
Red Hat Enterprise Linux CodeReady Linux Builder (v. 10)Fixed RHSA-2026:45114
Red Hat Enterprise Linux CodeReady Linux Builder (v. 9)Fixed RHSA-2026:43307
Red Hat Enterprise Linux CodeReady Linux Builder EUS (v. 10.0)Fixed RHSA-2026:55445
Red Hat Enterprise Linux Real Time (v. 10)Fixed RHSA-2026:45114
Red Hat Enterprise Linux Real Time (v. 9)Fixed RHSA-2026:43307
Red Hat Enterprise Linux Real Time EUS (v. 10.0)Fixed RHSA-2026:55445
Red Hat Enterprise Linux Real Time EUS (v.9.6)Fixed RHSA-2026:56574
Red Hat Enterprise Linux Real Time for NFV (v. 10)Fixed RHSA-2026:45114
Red Hat Enterprise Linux Real Time for NFV (v. 9)Fixed RHSA-2026:43307
Red Hat Enterprise Linux Real Time for NFV EUS (v. 10.0)Fixed RHSA-2026:55445
Red Hat Enterprise Linux Real Time for NFV EUS (v.9.6)Fixed RHSA-2026:56574
Not affected: 1 product
  • Red Hat Enterprise Linux 7

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-23110
  2. 2026-10-03 Alias added: GHSA-7p3h-gfr2-rwcv
  3. 2026-10-19 Weakness changed · CISA ADP
  4. 2026-10-29 Affected versions changed · Red Hat

References

Patch 5

Other 1

  • 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