TI-2026-48160 Aliases CVE-2026-68381 GHSA-gq9g-pv9h-2q5v

ksmbd: pin conn during async oplock break notification

MEDIUM 49CWE-416Published 2026-08-10 · Updated 2026-10-30

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: Code execution
Confidentiality · integrity · availability: High · High · High
Fix status: Fixed

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

Summary

In the Linux kernel, the following vulnerability has been resolved: ksmbd: pin conn during async oplock break notification smb2_oplock_break_noti() and smb2_lease_break_noti() store a ksmbd_conn pointer in an async ksmbd_work and then queue that work on ksmbd-io. The work only increments conn->r_count, which prevents teardown from passing the pending-request wait after the increment, but it does not pin the struct ksmbd_conn object. If connection teardown races with an oplock break notification, the last conn reference can be dropped before the queued worker finishes. The worker then uses the freed conn in ksmbd_conn_write() and ksmbd_conn_r_count_dec(). Take a real conn reference when publishing the conn pointer to the async work item, and drop it after the notification work has decremented r_count. Apply the same lifetime rule to lease break notification, which uses the same work->conn pattern.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00491 42nd percentileScored 2026-11-07

Fix Fixed Linux (Linux): 6.6.148, 6.12.101, 6.14 +3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: Yes
Technical impact: Total

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

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Linux	Linux	6.6.84 to before 6.6.148; 6.12.20 to before 6.12.101; 6.13.8 to before 6.14	6.6.148, 6.12.101, 6.14	Patch available	CNA
Linux	Linux	6.14 and later	6.6.148, 6.12.101, 6.18.42, 7.1.6, 7.2	Patch available	CNA

Linux VendorLinux Affected 6.6.84 to before 6.6.148; 6.12.20 to before 6.12.101; 6.13.8 to before 6.14 Fixed in 6.6.148, 6.12.101, 6.14 Patch available CNA
Linux VendorLinux Affected 6.14 and later Fixed in 6.6.148, 6.12.101, 6.18.42, 7.1.6, 7.2 Patch available CNA

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:o:linux:linux_kernel::::::::	—	—	Linux

cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions — — ·Linux

Remediation

Fix · CNA Linux (Linux) Fixed in 6.6.148, 6.12.101, 6.14
Fix · CNA Linux (Linux) Fixed in 6.6.148, 6.12.101, 6.18.42, 7.1.6, 7.2

Vendor assessments

Red Hat

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

Not affected: 5 products

Red Hat Enterprise Linux 10
Red Hat Enterprise Linux 6
Red Hat Enterprise Linux 7
Red Hat Enterprise Linux 8
Red Hat Enterprise Linux 9

Timeline

2026-10-02 Threatist record created from CVE-2026-68381
2026-10-03 Alias added: GHSA-gq9g-pv9h-2q5v
2026-10-14 EPSS moved to the below the 50th percentile
2026-10-16 CISA SSVC decision points changed
2026-10-20 Weakness changed · CISA ADP
2026-10-30 Fix available: Linux/Linux@dab1493bc9d97947f1219d6823c2e2a28636021b · CNA
2026-10-30 1 new reference · CNA

References

Other 6

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-2021-02452 Incorrect authorization in Ubuntu linux kernel 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

See all 21741 →

Sources

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