Unrated severityNVD Advisory· Published Sep 18, 2024· Updated Nov 3, 2025

x86/tdx: Fix data leak in mmio_read()

CVE-2024-46794

Description

In the Linux kernel, the following vulnerability has been resolved:

The mmio_read() function makes a TDVMCALL to retrieve MMIO data for an address from the VMM.

Sean noticed that mmio_read() unintentionally exposes the value of an initialized variable (val) on the stack to the VMM.

This variable is only needed as an output value. It did not need to be passed to the VMM in the first place.

Do not send the original value of *val to the VMM.

[ dhansen: clarify what 'val' is used for. ]

Affected products

osv-coords89 versions
pkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2015.6 pkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2015.6 pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2015.5 pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2015.6 pkg:rpm/opensuse/kernel-debug&distro=openSUSE%20Leap%2015.6 pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2015.6 pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%20Micro%205.5 pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2015.6 pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%20Micro%205.5 pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2015.6 pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2015.6 pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2015.6 pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2015.6 pkg:rpm/opensuse/kernel-rt_debug&distro=openSUSE%20Leap%2015.5 pkg:rpm/opensuse/kernel-rt_debug&distro=openSUSE%20Leap%2015.6 pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2015.5 pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2015.6 pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%20Micro%205.5 pkg:rpm/opensuse/kernel-source-azure&distro=openSUSE%20Leap%2015.5 pkg:rpm/opensuse/kernel-source-azure&distro=openSUSE%20Leap%2015.6 pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2015.6 pkg:rpm/opensuse/kernel-source-rt&distro=openSUSE%20Leap%2015.5 pkg:rpm/opensuse/kernel-source-rt&distro=openSUSE%20Leap%2015.6 pkg:rpm/opensuse/kernel-syms-azure&distro=openSUSE%20Leap%2015.5 pkg:rpm/opensuse/kernel-syms-azure&distro=openSUSE%20Leap%2015.6 pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2015.6 pkg:rpm/opensuse/kernel-syms-rt&distro=openSUSE%20Leap%2015.5 pkg:rpm/opensuse/kernel-syms-rt&distro=openSUSE%20Leap%2015.6 pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2015.6 pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP5 pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6 pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP5 pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP6 pkg:rpm/suse/kernel-coco_debug&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Confidential%20Computing%20Technical%20Preview%2015%20SP6 pkg:rpm/suse/kernel-coco&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Confidential%20Computing%20Technical%20Preview%2015%20SP6 pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Micro%205.5 pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP5 pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6 pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Micro%206.0 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP5 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2015%20SP6 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP5 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP6 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Micro%205.5 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP5 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Legacy%2015%20SP5 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Legacy%2015%20SP6 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP5 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Workstation%20Extension%2015%20SP6 pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Micro%206.0 pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP5 pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6 pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Micro%206.0 pkg:rpm/suse/kernel-livepatch-MICRO-6-0-RT_Update_3&distro=SUSE%20Linux%20Micro%206.0 pkg:rpm/suse/kernel-livepatch-MICRO-6-0_Update_3&distro=SUSE%20Linux%20Micro%206.0 pkg:rpm/suse/kernel-livepatch-SLE15-SP5-RT_Update_21&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP5 pkg:rpm/suse/kernel-livepatch-SLE15-SP5_Update_20&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP5 pkg:rpm/suse/kernel-livepatch-SLE15-SP6-RT_Update_4&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP6 pkg:rpm/suse/kernel-livepatch-SLE15-SP6_Update_5&distro=SUSE%20Linux%20Enterprise%20Live%20Patching%2015%20SP6 pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP5 pkg:rpm/suse/kernel-obs-build&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6 pkg:rpm/suse/kernel-rt_debug&distro=SUSE%20Real%20Time%20Module%2015%20SP5 pkg:rpm/suse/kernel-rt_debug&distro=SUSE%20Real%20Time%20Module%2015%20SP6 pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Enterprise%20Micro%205.5 pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Micro%206.0 pkg:rpm/suse/kernel-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP5 pkg:rpm/suse/kernel-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP6 pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP5 pkg:rpm/suse/kernel-source-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP6 pkg:rpm/suse/kernel-source-coco&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Confidential%20Computing%20Technical%20Preview%2015%20SP6 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP5 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP5 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6 pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Micro%206.0 pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Enterprise%20Micro%205.5 pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Linux%20Micro%206.0 pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP5 pkg:rpm/suse/kernel-source-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP6 pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP5 pkg:rpm/suse/kernel-syms-azure&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Public%20Cloud%2015%20SP6 pkg:rpm/suse/kernel-syms-coco&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Confidential%20Computing%20Technical%20Preview%2015%20SP6 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP5 pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Development%20Tools%2015%20SP6 pkg:rpm/suse/kernel-syms-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP5 pkg:rpm/suse/kernel-syms-rt&distro=SUSE%20Real%20Time%20Module%2015%20SP6 pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP5 pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Module%20for%20Basesystem%2015%20SP6
< 6.4.0-150600.23.25.1+ 88 more
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 5.14.21-150500.33.69.1
- (no CPE)range: < 6.4.0-150600.8.14.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 6.4.0-150600.23.25.1.150600.12.10.2
- (no CPE)range: < 5.14.21-150500.55.83.1.150500.6.37.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 5.14.21-150500.55.83.1
- (no CPE)range: < 6.4.0-150600.23.25.2
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 6.4.0-150600.23.25.2
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 5.14.21-150500.13.73.1
- (no CPE)range: < 6.4.0-150600.10.14.1
- (no CPE)range: < 5.14.21-150500.13.73.1
- (no CPE)range: < 6.4.0-150600.10.14.1
- (no CPE)range: < 5.14.21-150500.13.73.1
- (no CPE)range: < 5.14.21-150500.33.69.1
- (no CPE)range: < 6.4.0-150600.8.14.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 5.14.21-150500.13.73.1
- (no CPE)range: < 6.4.0-150600.10.14.1
- (no CPE)range: < 5.14.21-150500.33.69.1
- (no CPE)range: < 6.4.0-150600.8.14.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 5.14.21-150500.13.73.1
- (no CPE)range: < 6.4.0-150600.10.14.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 5.14.21-150500.55.83.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 5.14.21-150500.33.69.1
- (no CPE)range: < 6.4.0-150600.8.14.1
- (no CPE)range: < 6.4.0-15061.6.coco15sp6.1
- (no CPE)range: < 6.4.0-15061.6.coco15sp6.1
- (no CPE)range: < 5.14.21-150500.55.83.1.150500.6.37.1
- (no CPE)range: < 5.14.21-150500.55.83.1.150500.6.37.1
- (no CPE)range: < 6.4.0-150600.23.25.1.150600.12.10.2
- (no CPE)range: < 6.4.0-17.1.1.51
- (no CPE)range: < 5.14.21-150500.55.83.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 5.14.21-150500.55.83.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 5.14.21-150500.55.83.1
- (no CPE)range: < 5.14.21-150500.55.83.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 5.14.21-150500.55.83.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 5.14.21-150500.55.83.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 6.4.0-20.1
- (no CPE)range: < 5.14.21-150500.55.83.1
- (no CPE)range: < 6.4.0-150600.23.25.2
- (no CPE)range: < 6.4.0-20.1
- (no CPE)range: < 1-1.2
- (no CPE)range: < 1-1.2
- (no CPE)range: < 1-150500.11.3.1
- (no CPE)range: < 1-150500.11.3.1
- (no CPE)range: < 1-150600.1.3.1
- (no CPE)range: < 1-150600.13.3.1
- (no CPE)range: < 5.14.21-150500.55.83.1
- (no CPE)range: < 6.4.0-150600.23.25.2
- (no CPE)range: < 5.14.21-150500.13.73.1
- (no CPE)range: < 6.4.0-150600.10.14.1
- (no CPE)range: < 5.14.21-150500.13.73.1
- (no CPE)range: < 6.4.0-11.1
- (no CPE)range: < 5.14.21-150500.13.73.1
- (no CPE)range: < 6.4.0-150600.10.14.1
- (no CPE)range: < 5.14.21-150500.33.69.1
- (no CPE)range: < 6.4.0-150600.8.14.1
- (no CPE)range: < 6.4.0-15061.6.coco15sp6.1
- (no CPE)range: < 5.14.21-150500.55.83.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 5.14.21-150500.55.83.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 6.4.0-20.1
- (no CPE)range: < 5.14.21-150500.13.73.1
- (no CPE)range: < 6.4.0-11.1
- (no CPE)range: < 5.14.21-150500.13.73.1
- (no CPE)range: < 6.4.0-150600.10.14.1
- (no CPE)range: < 5.14.21-150500.33.69.1
- (no CPE)range: < 6.4.0-150600.8.14.1
- (no CPE)range: < 6.4.0-15061.6.coco15sp6.1
- (no CPE)range: < 5.14.21-150500.55.83.1
- (no CPE)range: < 6.4.0-150600.23.25.1
- (no CPE)range: < 5.14.21-150500.13.73.1
- (no CPE)range: < 6.4.0-150600.10.14.1
- (no CPE)range: < 5.14.21-150500.55.83.1
- (no CPE)range: < 6.4.0-150600.23.25.1
Linux/Linuxcpe-rescue
Range: 5.19

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

News mentions

No linked articles in our index yet.

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