What is CVE-2025-68799?

CVE-2025-68799 is a High severity Linux kernel vulnerability with a CVSS score of 8.1 out of 10, affecting Linux kernel versions from 2.6.35 onward and patched in 5.10.248, 5.15.198, 6.1.160 and others. CVE-2025-68799 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

What is the CVSS score for CVE-2025-68799?

CVE-2025-68799 has a CVSS score of 8.1 out of 10, rated High severity. The vector string is CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

Is there a patch available for CVE-2025-68799?

Yes, CVE-2025-68799 has been patched. Fixed versions include 5.10.248, 5.15.198, 6.1.160 and others. If you are running Linux kernel 2.6.35 or later up to the fix versions, apply the relevant patch for your kernel branch.

Is CVE-2025-68799 actively exploited?

CVE-2025-68799 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.

CVE-2025-68799

High

In the Linux kernel, the following vulnerability has been resolved: caif: fix integer underflow in cffrml_receive() The cffrml_receive() function extracts a length field from the packet header and, when FCS is disabled, subtracts 2 from this length without validating that len >= 2. If an attacker sends a malicious packet with a length field of 0 or 1 to an interface with FCS disabled, the subtraction causes an integer underflow. This can lead to memory exhaustion and kernel instability, potential information disclosure if padding contains uninitialized kernel memory. Fix this by validating that len >= 2 before performing the subtraction.

Package Linux Kernel

Published 2026-01-13

Last modified 2026-07-30

CVSS version 3.1

Patch available

Yes

CVSS 3.1 score

8.1

out of 10

High

Attack Vector

Adjacent

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

High

Vector string

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

Affected versions

Linux kernel versions 2.6.35 and later are affected. Fixed in 5.10.248, 5.15.198, 6.1.160, 6.6.120, 6.12.64, 6.18.3, 6.19 and their respective stable series.

Affected from

≥ 2.6.35

Fixed in

✓ 5.10.248 5.10.x ✓ 5.15.198 5.15.x ✓ 6.1.160 6.1.x ✓ 6.6.120 6.6.x ✓ 6.12.64 6.12.x ✓ 6.18.3 6.18.x ✓ 6.19

References

7 total

Showing 5 of 7 references View all on NVD

Details

CVE ID CVE-2025-68799

Severity High

CVSS score 8.1 / 10

CVSS version 3.1

Published 2026-01-13

Modified 2026-07-30

KEV No

Patch

Yes

Package linux

Frequently asked questions

What is CVE-2025-68799?

CVE-2025-68799 is a High severity Linux kernel vulnerability with a CVSS score of 8.1 out of 10 . It affects Linux kernel versions from 2.6.35 onward and has been patched in 5.10.248, 5.15.198, 6.1.160 and others. CVE-2025-68799 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
What is the CVSS score for CVE-2025-68799?

CVE-2025-68799 has a CVSS score of 8.1 out of 10, rated High severity (CVSS 3.1). The vector string is CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.
Is there a patch available for CVE-2025-68799?

Yes. CVE-2025-68799 has been patched. Fixed versions include 5.10.248, 5.15.198, 6.1.160 and others. If you are running Linux kernel 2.6.35 or later up to the fix versions, apply the relevant patch for your kernel branch.
Is CVE-2025-68799 actively exploited?

No. CVE-2025-68799 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.