What is CVE-2026-98952?

CVE-2026-98952 is a High severity Linux kernel vulnerability with a CVSS score of 7.3 out of 10, affecting Linux kernel versions from 6.10 onward and patched in 6.12.113, 6.18.57, 7.2.11 and others. CVE-2026-98952 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2026-98952?

CVE-2026-98952 has a CVSS score of 7.3 out of 10, rated High severity. The vector string is CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

Is there a patch available for CVE-2026-98952?

Yes, CVE-2026-98952 has been patched. Fixed versions include 6.12.113, 6.18.57, 7.2.11 and others. If you are running Linux kernel 6.10 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2026-98952 actively exploited?

CVE-2026-98952 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2026-98952

High

In the Linux kernel, the following vulnerability has been resolved: pfcp: make sure the SEID is linear before reading it pfcp_encap_recv() only makes sure that the UDP header and the 4 byte PFCP header are in the linear area. When the S flag is set, pfcp_session_recv() then reads the 8 byte SEID that follows, which is not covered by the pskb_may_pull() check. A short PFCP packet with the S flag set, or one whose session header lies in a fragment, therefore makes pfcp_session_recv() read beyond the end of the packet data, and whatever it finds there is stored in the tunnel metadata that flower later classifies on. Pull up to the end of the SEID before reading it, and drop packets that are too short to contain it. Reload the header pointer afterwards since pskb_may_pull() may reallocate the skb head. Use offsetofend() rather than sizeof(struct pfcphdr_session): the structure is not packed, so its size is 16 bytes because of the alignment of the __be64 member, while the header on the wire is only 12 bytes, and valid session messages would be dropped.

Package Linux Kernel

Published 2026-10-23

Last modified 2026-10-24

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

7.3

out of 10

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

Low

Availability

Low

Vector string

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

Affected versions

Linux kernel versions 6.10 and later are affected. Fixed in 6.12.113, 6.18.57, 7.2.11, 7.3 and their respective stable series.

Affected from

≥ 6.10

Fixed in

✓ 6.12.113 6.12.x ✓ 6.18.57 6.18.x ✓ 7.2.11 7.2.x ✓ 7.3

References

4 total

Details

CVE ID CVE-2026-98952

Severity High

CVSS score 7.3 / 10

CVSS version 3.1

Published 2026-10-23

Modified 2026-10-24

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2026-98952?

CVE-2026-98952 is a High severity Linux kernel vulnerability with a CVSS score of 7.3 out of 10 . It affects Linux kernel versions from 6.10 onward and has been patched in 6.12.113, 6.18.57, 7.2.11 and others. CVE-2026-98952 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2026-98952?

CVE-2026-98952 has a CVSS score of 7.3 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:L/I:L/A:L.
Is there a patch available for CVE-2026-98952?

Yes. CVE-2026-98952 has been patched. Fixed versions include 6.12.113, 6.18.57, 7.2.11 and others. If you are running Linux kernel 6.10 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2026-98952 actively exploited?

No. CVE-2026-98952 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.