TI-2025-26752 Aliases CVE-2025-40080 GHSA-mp9c-x94p-8jh7

nbd: restrict sockets to TCP and UDP

LOW 22Published 2025-10-28 · Updated 2026-10-15

Key facts

Attack vector: —
Privileges required: —
User interaction: —
Attack complexity: —
Impact type: —
Confidentiality · integrity · availability: —
Fix status: Partial Red Hat: 4 without a fix

No CVSS vector from any source. Fix status from CNA and Red Hat.

Summary

In the Linux kernel, the following vulnerability has been resolved: nbd: restrict sockets to TCP and UDP Recently, syzbot started to abuse NBD with all kinds of sockets. Commit cf1b2326b734 ("nbd: verify socket is supported during setup") made sure the socket supported a shutdown() method. Explicitely accept TCP and UNIX stream sockets.

Why it matters now

EPSS 0.00206 10th percentileScored 2026-11-07

Fix Partial Linux (Linux): 4.15, 4.20, 5.4 +5Red Hat: 4 without a fix

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
Linux	Linux	4.14.152 to before 4.15; 4.19.82 to before 4.20; 5.3.9 to before 5.4	4.15, 4.20, 5.4	Patch available	CNA
Linux	Linux	5.4 and later	6.1.156, 6.6.112, 6.12.53, 6.17.3, 6.18	Patch available	CNA

Linux VendorLinux Affected 4.14.152 to before 4.15; 4.19.82 to before 4.20; 5.3.9 to before 5.4 Fixed in 4.15, 4.20, 5.4 Patch available CNA
Linux VendorLinux Affected 5.4 and later Fixed in 6.1.156, 6.6.112, 6.12.53, 6.17.3, 6.18 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 4.15, 4.20, 5.4
Fix · CNA Linux (Linux) Fixed in 6.1.156, 6.6.112, 6.12.53, 6.17.3, 6.18

Vendor assessments

Red Hat

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

Product	Status	Plan or fix
Red Hat Enterprise Linux 10	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 6	Affected	No fix planned: Out of support scope
Red Hat Enterprise Linux 8	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 9	Affected	No fix yet: Fix deferred

Not affected: 1 product

Red Hat Enterprise Linux 7

Timeline

2026-10-02 Threatist record created from CVE-2025-40080
2026-10-03 Alias added: GHSA-mp9c-x94p-8jh7

References

Other 5

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 21727 →

Sources

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