What is CVE-2026-72463?

CVE-2026-72463 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10, affecting Linux kernel versions from 6.12.94 onward and patched in 6.12.112, 6.18.54, 7.1.5 and others. CVE-2026-72463 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-72463?

CVE-2026-72463 has a CVSS score of 9.8 out of 10, rated Critical severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Is there a patch available for CVE-2026-72463?

Yes, CVE-2026-72463 has been patched. Fixed versions include 6.12.112, 6.18.54, 7.1.5 and others. If you are running Linux kernel 6.12.94 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-72463 actively exploited?

CVE-2026-72463 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-72463

Critical

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.

Package Linux Kernel

Published 2026-08-15

Last modified 2026-10-03

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

9.8

out of 10

Critical

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Vector string

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected versions

Linux kernel versions 6.12.94, 6.18.23, 6.19.13, 7.0 and later are affected. Fixed in 6.12.112, 6.18.54, 7.1.5, 7.2 and their respective stable series.

Affected from

≥ 6.12.94 ≥ 6.18.23 ≥ 6.19.13 ≥ 7.0

Fixed in

✓ 6.12.112 6.12.x ✓ 6.18.54 6.18.x ✓ 7.1.5 7.1.x ✓ 7.2

References

4 total

Details

CVE ID CVE-2026-72463

Severity Critical

CVSS score 9.8 / 10

CVSS version 3.1

Published 2026-08-15

Modified 2026-10-03

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-72463?

CVE-2026-72463 is a Critical severity Linux kernel vulnerability with a CVSS score of 9.8 out of 10 . It affects Linux kernel versions from 6.12.94 onward and has been patched in 6.12.112, 6.18.54, 7.1.5 and others. CVE-2026-72463 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-72463?

CVE-2026-72463 has a CVSS score of 9.8 out of 10, rated Critical severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
Is there a patch available for CVE-2026-72463?

Yes. CVE-2026-72463 has been patched. Fixed versions include 6.12.112, 6.18.54, 7.1.5 and others. If you are running Linux kernel 6.12.94 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-72463 actively exploited?

No. CVE-2026-72463 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.