Unrated severityNVD Advisory· Published Dec 16, 2025· Updated Apr 15, 2026
CVE-2025-68237
CVE-2025-68237
Description
In the Linux kernel, the following vulnerability has been resolved:
mtdchar: fix integer overflow in read/write ioctls
The "req.start" and "req.len" variables are u64 values that come from the user at the start of the function. We mask away the high 32 bits of "req.len" so that's capped at U32_MAX but the "req.start" variable can go up to U64_MAX which means that the addition can still integer overflow.
Use check_add_overflow() to fix this bug.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
103- osv-coords102 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%2016.0pkg: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&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2015.6pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2016.0pkg: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%20SP7pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP6-LTSSpkg: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%20SP7pkg: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%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP6-LTSSpkg: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%2015%20SP6pkg: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%20SP7pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Legacy%2015%20SP7pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP6-LTSSpkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP6pkg: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%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%20SP7pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP6-LTSSpkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP6pkg: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_Update_19&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP6pkg:rpm/suse/kernel-livepatch-SLE15-SP7-RT_Update_8&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP7pkg:rpm/suse/kernel-livepatch-SLE15-SP7_Update_8&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP7pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP7pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP6-LTSSpkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP6pkg: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%206.0pkg: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%20SP7pkg: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%20SP7pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP7pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP6-LTSSpkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP6pkg: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%20SP7pkg: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%20SP7pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP6-LTSSpkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20Applications%2015%20SP6pkg: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%20SP7pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP7pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%2015%20SP6-LTSSpkg: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
>= 5.17.0, < 6.1.159+ 101 more
- (no CPE)range: >= 5.17.0, < 6.1.159
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.4.0-150600.23.84.1.150600.12.38.1
- (no CPE)range: < 6.12.0-160000.9.1.160000.2.6
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-150700.53.28.1
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-150700.20.24.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-150700.53.28.1.150700.17.19.1
- (no CPE)range: < 6.4.0-150600.23.84.1.150600.12.38.1
- (no CPE)range: < 6.12.0-160000.9.1.160000.2.6
- (no CPE)range: < 6.4.0-150600.23.84.1.150600.12.38.1
- (no CPE)range: < 6.12.0-160000.9.1.160000.2.6
- (no CPE)range: < 6.4.0-39.1.21.16
- (no CPE)range: < 6.4.0-39.1.21.16
- (no CPE)range: < 6.12.0-160000.9.1.160000.2.6
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.4.0-150700.53.28.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.4.0-150700.53.28.1
- (no CPE)range: < 6.4.0-150700.53.28.1
- (no CPE)range: < 6.4.0-150700.53.28.1
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-150700.53.28.1
- (no CPE)range: < 6.4.0-39.1
- (no CPE)range: < 6.4.0-39.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-150700.53.28.1
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-39.1
- (no CPE)range: < 6.4.0-39.1
- (no CPE)range: < 1-150600.13.3.1
- (no CPE)range: < 1-150700.1.3.1
- (no CPE)range: < 1-150700.15.3.1
- (no CPE)range: < 6.4.0-150700.53.28.1
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-40.1
- (no CPE)range: < 6.4.0-40.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-150700.7.28.1
- (no CPE)range: < 6.4.0-150700.20.24.1
- (no CPE)range: < 6.4.0-150700.53.28.1
- (no CPE)range: < 6.4.0-150700.53.28.1
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-39.1
- (no CPE)range: < 6.4.0-39.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-40.1
- (no CPE)range: < 6.4.0-40.1
- (no CPE)range: < 6.4.0-150700.7.28.1
- (no CPE)range: < 6.4.0-150700.20.24.1
- (no CPE)range: < 6.4.0-150700.53.28.1
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.4.0-150700.7.28.1
- (no CPE)range: < 6.4.0-150700.53.28.1
- (no CPE)range: < 6.4.0-150600.23.84.1
- (no CPE)range: < 6.12.0-160000.9.1
- (no CPE)range: < 6.12.0-160000.9.1
Patches
Vulnerability mechanics
References
5- git.kernel.org/stable/c/37944f4f8199cd153fef74e95ca268020162f212nvd
- git.kernel.org/stable/c/457376c6fbf0c69326a9bf1f72416225f681192bnvd
- git.kernel.org/stable/c/e4185bed738da755b191aa3f2e16e8b48450e1b8nvd
- git.kernel.org/stable/c/eb9361484814fb12f3b7544b33835ea67d7a6a97nvd
- git.kernel.org/stable/c/f37efdd97fd1ec3e0d0f1eec279c8279e28f981envd
News mentions
0No linked articles in our index yet.