Unrated severityNVD Advisory· Published Jan 13, 2026· Updated Apr 15, 2026
CVE-2025-68799
CVE-2025-68799
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
41- osv-coords40 versionspkg:linux/kernelpkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2016.0pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2016.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-obs-qa&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-obs-qa&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0
>= 2.6.35, < 5.10.248+ 39 more
- (no CPE)range: >= 2.6.35, < 5.10.248
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1.160000.2.7
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1.160000.2.7
- (no CPE)range: < 6.12.0-160000.26.1.160000.2.7
- (no CPE)range: < 6.12.0-160000.26.1.160000.2.7
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
- (no CPE)range: < 6.12.0-160000.26.1
Patches
Vulnerability mechanics
References
7- git.kernel.org/stable/c/21fdcc00656a60af3c7aae2dea8dd96abd35519cnvd
- git.kernel.org/stable/c/4ec29714aa4e0601ea29d2f02b461fc0ac92c2c3nvd
- git.kernel.org/stable/c/785c7be6361630070790f6235b696da156ac71b3nvd
- git.kernel.org/stable/c/8a11ff0948b5ad09b71896b7ccc850625f9878d1nvd
- git.kernel.org/stable/c/c54091eec6fed19e94182aa05dd6846600a642f7nvd
- git.kernel.org/stable/c/f407f1c9f45bbf5c99fd80b3f3f4a94fdbe35691nvd
- git.kernel.org/stable/c/f818cd472565f8b0c2c409b040e0121c5cf8592cnvd
News mentions
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