What is CVE-2025-68799?

CVE-2025-68799 is a unscored severity Linux kernel vulnerability, 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 pending NVD analysis out of 10, rated awaiting scoring severity.

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

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 2026-04-15

Patch available

Yes

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

The following references provide additional information about CVE-2025-68799 including vendor advisories, patch commits, exploit details, and third-party analysis. Links are sourced from the NIST NVD database.

Kernel patch commit
https://git.kernel.org/stable/c/21fdcc00656a60af3c7aae2dea8dd96abd35519c
Patch
Kernel patch commit
https://git.kernel.org/stable/c/4ec29714aa4e0601ea29d2f02b461fc0ac92c2c3
Patch
Kernel patch commit
https://git.kernel.org/stable/c/785c7be6361630070790f6235b696da156ac71b3
Patch

7 patch commits total View all on NVD

Frequently asked questions

What is CVE-2025-68799?

CVE-2025-68799 is a unscored severity Linux kernel vulnerability . 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.
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.