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CVE-2025-68799

HIGHCVSS 8.1/10EPSS 0.17%

Last modified

CVE-2025-68799 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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.. EPSS estimates a 0.17% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
8.1/10

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

EPSS Probability
0.17%

6.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= b482cd2053e3b90a7b33a78c63cdb6badf2ec383, < f407f1c9f45bbf5c99fd80b3f3f4a94fdbe35691; >= b482cd2053e3b90a7b33a78c63cdb6badf2ec383, < c54091eec6fed19e94182aa05dd6846600a642f7; >= b482cd2053e3b90a7b33a78c63cdb6badf2ec383, < 785c7be6361630070790f6235b696da156ac71b3; >= b482cd2053e3b90a7b33a78c63cdb6badf2ec383, < f818cd472565f8b0c2c409b040e0121c5cf8592c; >= b482cd2053e3b90a7b33a78c63cdb6badf2ec383, < 4ec29714aa4e0601ea29d2f02b461fc0ac92c2c3; >= b482cd2053e3b90a7b33a78c63cdb6badf2ec383, < 21fdcc00656a60af3c7aae2dea8dd96abd35519c; >= b482cd2053e3b90a7b33a78c63cdb6badf2ec383, < 8a11ff0948b5ad09b71896b7ccc850625f9878d1
LinuxLinux2.6.35

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is 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.
How severe is CVE-2025-68799?
CVE-2025-68799 has a CVSS score of 8.1/10 (HIGH severity). The EPSS model estimates a 0.17% probability of exploitation in the next 30 days.
How do I fix CVE-2025-68799?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST