TI-2026-50742 Aliases CVE-2026-72463 GHSA-23r2-6gqr-3m38

xfrm: Fix dev use-after-free in xfrm async resumption

MEDIUM 42Published 2026-08-15 · Updated 2026-10-30

Key facts

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

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

Summary

In the Linux kernel, the following vulnerability has been resolved: xfrm: Fix dev use-after-free in xfrm async resumption xfrm async resumption hold skb->dev refcnt until after transport_finish. However, xfrm_rcv_cb may modify skb->dev to tunnel dev without taking device reference, such as vti_rcv_cb. The subsequent async resumption will decrement the tunnel device's reference count, which lead to uaf of tunnel dev and refcnt leak of orig dev as below: unregister_netdevice: waiting for vti1 to become free. Usage count = -2 Stash the original skb->dev to fix refcnt imbalance. The new skb->dev set by xfrm_rcv_cb can race with device teardown. Extend rcu protection over xfrm_rcv_cb and transport_finish to prevent races.

Why it matters now

EPSS 0.00444 38th percentileScored 2026-11-07

Fix Fixed Linux (Linux): 6.12.112, 6.18.54, 6.2 +4

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	6.12.94 to before 6.12.112; 6.18.23 to before 6.18.54; 6.1.191 to before 6.2; 6.6.160 to before 6.7; 6.19.13 to before 6.20	6.12.112, 6.18.54, 6.2, 6.7, 6.20	Patch available	CNA
Linux	Linux	7.0 and later	6.12.112, 6.18.54, 7.1.5, 7.2	Patch available	CNA

Linux VendorLinux Affected 6.12.94 to before 6.12.112; 6.18.23 to before 6.18.54; 6.1.191 to before 6.2; 6.6.160 to before 6.7; 6.19.13 to before 6.20 Fixed in 6.12.112, 6.18.54, 6.2, 6.7, 6.20 Patch available CNA
Linux VendorLinux Affected 7.0 and later Fixed in 6.12.112, 6.18.54, 7.1.5, 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 6.12.112, 6.18.54, 6.2, 6.7, 6.20
Fix · CNA Linux (Linux) Fixed in 6.12.112, 6.18.54, 7.1.5, 7.2

Vendor assessments

Red Hat

Red Hat rating: Important. 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-2026-72463
2026-10-03 Alias added: GHSA-23r2-6gqr-3m38
2026-10-03 Fix available: Linux/[email protected], Linux/Linux@fed4d3195a31125566876952ce66113ec1eb9008 · CNA
2026-10-03 1 new reference · CNA
2026-10-21 Fix available: Linux/[email protected] · CNA
2026-10-30 Fix available: Linux/[email protected] · CNA

References

Other 4

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