caif: fix integer underflow in cffrml_receive() (Linux Linux)

CVE-2025-68799
HIGH 8.1

At a glance

Source
NVD
EPSS
EPSS 0.31 % · percentile 24 ()
State
PUBLISHED
Published
Updated
Assigner
Linux
NVD status
Deferred

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.

References

Scores

VersionScoreVectorScored by
CVSS 3.1HIGH 8.1CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:HLinux
CVSS 3.1HIGH 8.1CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:HNVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary)

European references

CERT-FR advisories

Affected products

ProductVersions
Linux · Linuxaffected b482cd2053e3b90a7b33a78c63cdb6badf2ec383 < f407f1c9f45bbf5c99fd80b3f3f4a94fdbe35691 ; affected b482cd2053e3b90a7b33a78c63cdb6badf2ec383 < c54091eec6fed19e94182aa05dd6846600a642f7 ; affected b482cd2053e3b90a7b33a78c63cdb6badf2ec383 < 785c7be6361630070790f6235b696da156ac71b3 ; affected b482cd2053e3b90a7b33a78c63cdb6badf2ec383 < f818cd472565f8b0c2c409b040e0121c5cf8592c ; affected b482cd2053e3b90a7b33a78c63cdb6badf2ec383 < 4ec29714aa4e0601ea29d2f02b461fc0ac92c2c3 ; affected b482cd2053e3b90a7b33a78c63cdb6badf2ec383 < 21fdcc00656a60af3c7aae2dea8dd96abd35519c
Linux · Linuxaffected 2.6.35 ; unaffected 0 < 2.6.35 ; unaffected 5.10.248 ≤ 5.10.* ; unaffected 5.15.198 ≤ 5.15.* ; unaffected 6.1.160 ≤ 6.1.* ; unaffected 6.6.120 ≤ 6.6.*

Sources

SourceLicence
CVE List (CVEProject cvelistV5)CVE Program Terms of Use
EPSS (FIRST.org)FIRST — attribution requested
ENISA EUVDENISA — reproduction authorised, source acknowledged
CERT-FR (ANSSI)Licence Ouverte / Etalab 2.0
NVD (NIST) via fkie-cad/nvd-json-data-feedsPublic domain — this product uses data from the NVD API but is not endorsed or certified by the NVD