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Vulnerabilities

Vulnerability · 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 p

Published Jan 13, 2026 · catalog updated Aug 5, 2026 · Linux Linux

Last checked Oct 29, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2025-68799. EPSS is 0.31%. Act only if a listed version of Linux Linux is installed.

Gaps on this record

  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High8.1
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.31%
Remediation
Version ranges on file
Affected products
vendor Linux Linux b482cd2053e3b90a7b33a78c63cdb6badf2ec383 <c54091eec6fed19e94182aa05dd6846600a642f7

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 tha

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor Linux Linux b482cd2053e3b90a7b33a78c63cdb6badf2ec383 <c54091eec6fed19e94182aa05dd6846600a642f7b482cd2053e3b90a7b33a78c63cdb6badf2ec383 <c54091eec6fed19e94182aa05dd6846600a642f7

How to fix CVE-2025-68799

  • Upgrade

    CVE-2025-68799 lists a fix boundary at c54091eec6fed19e94182aa05dd6846600a642f7. Compare the installed build with that boundary before you change production.

  • Version check

    Seen in b482cd2053e3b90a7b33a78c63cdb6badf2ec383 <c54091eec6fed19e94182aa05dd6846600a642f7

  • Advisory

    Open the cve_org record and follow its fix.

  • Official advisories

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2025-68799. EPSS is 0.31%. Act only if a listed version of Linux Linux is installed.

Which versions are affected?

Compare what you have installed with Linux Linux b482cd2053e3b90a7b33a78c63cdb6badf2ec383 <c54091eec6fed19e94182aa05dd6846600a642f7 b482cd2053e3b90a7b33a78c63cdb6badf2ec383 <c54091eec6fed19e94182aa05dd6846600a642f7. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.31%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

Timeline

Detection, updates, and resolution for this record.

  1. Jan 13, 2026 · EUVD

    Detected

    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 subtract

  2. Aug 5, 2026 · EUVD

    Updated

    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 subtract

Sources

  • CVE.orgVulnerability recordCVE-2025-68799

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2025-68799

    30-day exploitation probability 0.31%

    first.org
  • EUVDVulnerability recordEUVD-2026-2290

    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 >=

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Oct 29, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgOct 29, 2026
  • FIRST EPSSOct 29, 2026
  • EUVDOct 29, 2026