8.1

CVE-2025-68799: linux

CVSS: 8.1v3.1HighDeferred
AliasesUBUNTU-CVE-2025-68799DEBIAN-CVE-2025-68799
Published 13-01-2026Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2025-68799 is a high (CVSS 8.1) vulnerability in linux. EPSS estimates a 0.31% chance of exploitation in the next 30 days, higher than 22.5% of scored vulnerabilities.

Overall risk
32/100
0100
Medium · default modelHow is this calculated?
CVSS score
8.1/10
010
High · v3.1 (CVE.org)
EPSS score
0.31%
0%100%
Low · +0.01 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 39 · Related 35
DLA-4475-1DLA-4476-1DSA-6126-1DSA-6127-1MGASA-2026-0017MGASA-2026-0018

Timeline

  1. 13-01-2026
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.31%

Chance of exploitation in the next 30 days

Percentile

23%

Versus all other CVEs

30-day change

+0.01 pp

From 0.30% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.31%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu156 products
  • linuxAll versions (No fix recorded) | < 5.15.0-173.183 | < 6.8.0-110.110 | < 6.17.0-22.22
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1103.110 | < 6.8.0-1052.55 | < 6.17.0-1012.12
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linux< 6.1.162-1 | < 6.12.69-1 | < 6.18.3-1
Linux1 product
  • linux≥ b482cd2053e3b90a7b33a78c63cdb6badf2ec383, < f407f1c9f45bbf5c99fd80b3f3f4a94fdbe35691 | ≥ b482cd2053e3b90a7b33a78c63cdb6badf2ec383, < c54091eec6fed19e94182aa05dd6846600a642f7 | ≥ b482cd2053e3b90a7b33a78c63cdb6badf2ec383, < 785c7be6361630070790f6235b696da156ac71b3 | ≥ b482cd2053e3b90a7b33a78c63cdb6badf2ec383, < f818cd472565f8b0c2c409b040e0121c5cf8592c | ≥ b482cd2053e3b90a7b33a78c63cdb6badf2ec383, < 4ec29714aa4e0601ea29d2f02b461fc0ac92c2c3 | ≥ b482cd2053e3b90a7b33a78c63cdb6badf2ec383, < 21fdcc00656a60af3c7aae2dea8dd96abd35519c | ≥ b482cd2053e3b90a7b33a78c63cdb6badf2ec383, < 8a11ff0948b5ad09b71896b7ccc850625f9878d1 | 2.6.35

3 vendors · 158 products

References

42 links
Show all 42 references