What is CVE-2026-72253?

CVE-2026-72253 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10, affecting Linux kernel versions from 4.3 onward and patched in 5.10.266, 5.15.217, 6.1.184 and others. CVE-2026-72253 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-72253?

CVE-2026-72253 has a CVSS score of 7.5 out of 10, rated High severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

Is there a patch available for CVE-2026-72253?

Yes, CVE-2026-72253 has been patched. Fixed versions include 5.10.266, 5.15.217, 6.1.184 and others. If you are running Linux kernel 4.3 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-72253 actively exploited?

CVE-2026-72253 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-72253

High

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_conntrack_sip: validate skb_dst() before accessing it tc ingress and openvswitch do not guarantee routing information to be available. These subsystems use the conntrack helper infrastructure, and the SIP helper relies on the skb_dst() to be present if sip_external_media is set to 1 (which is disabled by default as a module parameter). This effectively disables the sip_external_media toggle for these subsystems without resulting in a crash.

Package Linux Kernel

Published 2026-08-15

Last modified 2026-08-23

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.5

out of 10

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

None

Availability

High

Vector string

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

Affected versions

Linux kernel versions 4.3 and later are affected. Fixed in 5.10.266, 5.15.217, 6.1.184, 6.6.148, 6.12.101, 6.18.42, 7.1.5, 7.2 and their respective stable series.

Affected from

≥ 4.3

Fixed in

✓ 5.10.266 5.10.x ✓ 5.15.217 5.15.x ✓ 6.1.184 6.1.x ✓ 6.6.148 6.6.x ✓ 6.12.101 6.12.x ✓ 6.18.42 6.18.x ✓ 7.1.5 7.1.x ✓ 7.2

References

8 total

Showing 5 of 8 references View all on NVD

Details

CVE ID CVE-2026-72253

Severity High

CVSS score 7.5 / 10

CVSS version 3.1

Published 2026-08-15

Modified 2026-08-23

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-72253?

CVE-2026-72253 is a High severity Linux kernel vulnerability with a CVSS score of 7.5 out of 10 . It affects Linux kernel versions from 4.3 onward and has been patched in 5.10.266, 5.15.217, 6.1.184 and others. CVE-2026-72253 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-72253?

CVE-2026-72253 has a CVSS score of 7.5 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Is there a patch available for CVE-2026-72253?

Yes. CVE-2026-72253 has been patched. Fixed versions include 5.10.266, 5.15.217, 6.1.184 and others. If you are running Linux kernel 4.3 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-72253 actively exploited?

No. CVE-2026-72253 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.