Unrated severityNVD Advisory· Published Oct 28, 2025· Updated Apr 15, 2026
CVE-2025-40056
CVE-2025-40056
Description
In the Linux kernel, the following vulnerability has been resolved:
vhost: vringh: Fix copy_to_iter return value check
The return value of copy_to_iter can't be negative, check whether the copied length is equal to the requested length instead of checking for negative values.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
114- osv-coords113 versionspkg:linux/kernelpkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-debug&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-rt_debug&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source-azure&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/kernel-source-longterm&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/kernel-source-rt&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-syms-azure&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-syms-rt&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2016.0pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg: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%20Module%20for%20Public%20Cloud%2015%20SP6pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP7pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg: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%206.0pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP7pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2016.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP7pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Legacy%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Legacy%2015%20SP7pkg: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%20Enterprise%20Workstation%20Extension%2015%20SP6pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP7pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP7pkg: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-kvmsmall&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-livepatch-SLE15-SP6-RT_Update_17&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP6pkg:rpm/suse/kernel-livepatch-SLE15-SP6_Update_17&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP6pkg:rpm/suse/kernel-livepatch-SLE15-SP7-RT_Update_6&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP7pkg:rpm/suse/kernel-livepatch-SLE15-SP7_Update_6&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP7pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP7pkg: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_debug&distro=SUSE%20Real%20Time%20Module%2015%20SP6pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP6pkg:rpm/suse/kernel-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP7pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP6pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP7pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP7pkg: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%206.0pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Micro%206.0pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Micro%206.1pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP6pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP7pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP6pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP7pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP7pkg: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-syms-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP6pkg:rpm/suse/kernel-syms-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP7pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg: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
>= 6.0.0, < 6.1.156+ 112 more
- (no CPE)range: >= 6.0.0, < 6.1.156
- (no CPE)range: < 6.4.0-150600.23.78.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.4.0-150600.23.78.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.4.0-150600.8.55.1
- (no CPE)range: < 6.4.0-150600.23.78.1
- (no CPE)range: < 6.4.0-150600.23.78.1.150600.12.34.2
- (no CPE)range: < 6.12.0-160000.6.1.160000.2.4
- (no CPE)range: < 6.4.0-150600.23.78.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.4.0-150600.23.78.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.4.0-150600.23.78.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.4.0-150600.23.78.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.4.0-150600.23.78.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.4.0-150600.10.58.1
- (no CPE)range: < 6.4.0-150600.10.58.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.4.0-150600.8.55.1
- (no CPE)range: < 6.4.0-150600.23.78.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.17.7-1.1
- (no CPE)range: < 6.18.16-1.1
- (no CPE)range: < 6.4.0-150600.10.58.1
- (no CPE)range: < 6.4.0-150600.8.55.1
- (no CPE)range: < 6.4.0-150600.23.78.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.4.0-150600.10.58.1
- (no CPE)range: < 6.4.0-150600.23.78.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.4.0-150600.23.78.1
- (no CPE)range: < 6.4.0-150700.53.22.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.4.0-150600.8.55.1
- (no CPE)range: < 6.4.0-150700.20.18.1
- (no CPE)range: < 6.4.0-150600.23.78.1.150600.12.34.2
- (no CPE)range: < 6.4.0-150700.53.22.1.150700.17.15.1
- (no CPE)range: < 6.12.0-160000.6.1.160000.2.4
- (no CPE)range: < 6.12.0-160000.6.1.160000.2.4
- (no CPE)range: < 6.4.0-36.1.21.13
- (no CPE)range: < 6.4.0-36.1.21.13
- (no CPE)range: < 6.12.0-160000.6.1.160000.2.4
- (no CPE)range: < 6.4.0-150600.23.78.1
- (no CPE)range: < 6.4.0-150700.53.22.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.4.0-150600.23.78.1
- (no CPE)range: < 6.4.0-150700.53.22.1
- (no CPE)range: < 6.4.0-150600.23.78.1
- (no CPE)range: < 6.4.0-150700.53.22.1
- (no CPE)range: < 6.4.0-150600.23.78.1
- (no CPE)range: < 6.4.0-150700.53.22.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.4.0-150600.23.78.1
- (no CPE)range: < 6.4.0-150700.53.22.1
- (no CPE)range: < 6.4.0-36.1
- (no CPE)range: < 6.4.0-36.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.4.0-150600.23.78.1
- (no CPE)range: < 6.4.0-150700.53.22.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.4.0-36.1
- (no CPE)range: < 6.4.0-36.1
- (no CPE)range: < 1-150600.1.3.1
- (no CPE)range: < 1-150600.13.5.1
- (no CPE)range: < 1-150700.1.3.1
- (no CPE)range: < 1-150700.15.3.1
- (no CPE)range: < 6.4.0-150600.23.78.1
- (no CPE)range: < 6.4.0-150700.53.22.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.4.0-150600.10.58.1
- (no CPE)range: < 6.4.0-38.1
- (no CPE)range: < 6.4.0-38.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.4.0-150600.10.58.1
- (no CPE)range: < 6.4.0-150700.7.22.1
- (no CPE)range: < 6.4.0-150600.8.55.1
- (no CPE)range: < 6.4.0-150700.20.18.1
- (no CPE)range: < 6.4.0-150600.23.78.1
- (no CPE)range: < 6.4.0-150700.53.22.1
- (no CPE)range: < 6.4.0-150600.23.78.1
- (no CPE)range: < 6.4.0-150700.53.22.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.4.0-36.1
- (no CPE)range: < 6.4.0-36.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.4.0-38.1
- (no CPE)range: < 6.4.0-38.1
- (no CPE)range: < 6.4.0-150600.10.58.1
- (no CPE)range: < 6.4.0-150700.7.22.1
- (no CPE)range: < 6.4.0-150600.8.55.1
- (no CPE)range: < 6.4.0-150700.20.18.1
- (no CPE)range: < 6.4.0-150600.23.78.1
- (no CPE)range: < 6.4.0-150700.53.22.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.4.0-150600.10.58.1
- (no CPE)range: < 6.4.0-150700.7.22.1
- (no CPE)range: < 6.4.0-150600.23.78.1
- (no CPE)range: < 6.4.0-150700.53.22.1
- (no CPE)range: < 6.12.0-160000.7.1
- (no CPE)range: < 6.12.0-160000.7.1
Patches
Vulnerability mechanics
References
5- git.kernel.org/stable/c/439263376c2c4e126cac0d07e4987568de4eaba5nvd
- git.kernel.org/stable/c/68aac2b335d474b938d154b9c95cbc58838cb2cenvd
- git.kernel.org/stable/c/781226e11d5bdea0d69c7b5aa3cda874093c73b8nvd
- git.kernel.org/stable/c/b3a950d236e98440c07405ba597b11bce56a8050nvd
- git.kernel.org/stable/c/bd71e7e0a612740e4de5524880c7cd40293af5f7nvd
News mentions
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