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High · 7.1 CVE-2024-50182 EUVD-2024-44684GHSA-9fq4-227m-74p5

secretmem: disable memfd_secret() if arch cannot set direct map

Published Nov 8, 2024 · Updated Aug 5, 2026 · Assigned by Linux

Vendor: Linux Product: Linux Package: kernel Package: linux Package: linux Package: linux-allwinner-5.19 Package: linux-aws Package: linux-aws-5.0 Package: linux-aws-5.11 Package: linux-aws-5.13 Package: linux-aws-5.15 Package: linux-aws-5.19 Package: linux-aws-5.3 Package: linux-aws-5.8 Package: linux-aws-6.2 Package: linux-aws-6.5 Package: linux-aws-6.8 Package: linux-aws-fips Package: linux-azure Package: linux-azure-5.11 Package: linux-azure-5.13 Package: linux-azure-5.15 Package: linux-azure-5.19 Package: linux-azure-5.3 Package: linux-azure-5.8 Package: linux-azure-6.11 Package: linux-azure-6.2 Package: linux-azure-6.5 Package: linux-azure-6.8 Package: linux-azure-edge Package: linux-azure-fde Package: linux-azure-fde-5.19 Package: linux-azure-fde-6.2 Package: linux-azure-fips Package: linux-azure-nvidia Package: linux-bluefield Package: linux-fips Package: linux-gcp Package: linux-gcp-5.11 Package: linux-gcp-5.13 Package: linux-gcp-5.15 Package: linux-gcp-5.19 Package: linux-gcp-5.3 Package: linux-gcp-5.8 Package: linux-gcp-6.11 Package: linux-gcp-6.2 Package: linux-gcp-6.5 Package: linux-gcp-6.8 Package: linux-gcp-fips Package: linux-gke Package: linux-gke-4.15 Package: linux-gke-5.15 Package: linux-gke-5.4 Package: linux-gkeop Package: linux-gkeop-5.15 Package: linux-gkeop-5.4 Package: linux-hwe Package: linux-hwe-5.11 Package: linux-hwe-5.13 Package: linux-hwe-5.15 Package: linux-hwe-5.19 Package: linux-hwe-5.8 Package: linux-hwe-6.2 Package: linux-hwe-6.5 Package: linux-hwe-6.8 Package: linux-hwe-edge Package: linux-ibm Package: linux-ibm-5.15 Package: linux-ibm-6.8 Package: linux-intel-5.13 Package: linux-intel-iot-realtime Package: linux-intel-iotg Package: linux-intel-iotg-5.15 Package: linux-kvm Package: linux-lowlatency Package: linux-lowlatency-hwe-5.15 Package: linux-lowlatency-hwe-5.19 Package: linux-lowlatency-hwe-6.2 Package: linux-lowlatency-hwe-6.5 Package: linux-lowlatency-hwe-6.8 Package: linux-nvidia Package: linux-nvidia-6.11 Package: linux-nvidia-6.2 Package: linux-nvidia-6.5 Package: linux-nvidia-6.8 Package: linux-nvidia-lowlatency Package: linux-nvidia-tegra Package: linux-nvidia-tegra-5.15 Package: linux-nvidia-tegra-igx Package: linux-oem Package: linux-oem-5.10 Package: linux-oem-5.13 Package: linux-oem-5.14 Package: linux-oem-5.17 Package: linux-oem-5.6 Package: linux-oem-6.0 Package: linux-oem-6.1 Package: linux-oem-6.11 Package: linux-oem-6.5 Package: linux-oem-6.8 Package: linux-oracle Package: linux-oracle-5.0 Package: linux-oracle-5.11 Package: linux-oracle-5.13 Package: linux-oracle-5.15 Package: linux-oracle-5.3 Package: linux-oracle-5.8 Package: linux-oracle-6.5 Package: linux-oracle-6.8 Package: linux-raspi Package: linux-raspi-realtime Package: linux-raspi2 Package: linux-realtime Package: linux-realtime-6.8 Package: linux-riscv Package: linux-riscv-5.11 Package: linux-riscv-5.15 Package: linux-riscv-5.19 Package: linux-riscv-5.8 Package: linux-riscv-6.5 Package: linux-riscv-6.8 Package: linux-starfive-5.19 Package: linux-starfive-6.2 Package: linux-starfive-6.5 Package: linux-vmware Package: linux-xilinx Package: linux-xilinx-zynqmp Platform: Linux Ecosystem: Azure Linux Ecosystem: Debian Ecosystem: Ubuntu

Description

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

secretmem: disable memfd_secret() if arch cannot set direct map

Return -ENOSYS from memfd_secret() syscall if !can_set_direct_map(). This
is the case for example on some arm64 configurations, where marking 4k
PTEs in the direct map not present can only be done if the direct map is
set up at 4k granularity in the first place (as ARM's break-before-make
semantics do not easily allow breaking apart large/gigantic pages).

More precisely, on arm64 systems with !can_set_direct_map(),
set_direct_map_invalid_noflush() is a no-op, however it returns success
(0) instead of an error. This means that memfd_secret will seemingly
"work" (e.g. syscall succeeds, you can mmap the fd and fault in pages),
but it does not actually achieve its goal of removing its memory from the
direct map.

Note that with this patch, memfd_secret() will start erroring on systems
where can_set_direct_map() returns false (arm64 with
CONFIG_RODATA_FULL_DEFAULT_ENABLED=n, CONFIG_DEBUG_PAGEALLOC=n and
CONFIG_KFENCE=n), but that still seems better than the current silent
failure. Since CONFIG_RODATA_FULL_DEFAULT_ENABLED defaults to 'y', most
arm64 systems actually have a working memfd_secret() and aren't be
affected.

From going through the iterations of the original memfd_secret patch
series, it seems that disabling the syscall in these scenarios was the
intended behavior [1] (preferred over having
set_direct_map_invalid_noflush return an error as that would result in
SIGBUSes at page-fault time), however the check for it got dropped between
v16 [2] and v17 [3], when secretmem moved away from CMA allocations.

[1]: https://lore.kernel.org/lkml/20201124164930.GK8537@kernel.org/
[2]: https://lore.kernel.org/lkml/20210121122723.3446-11-rppt@kernel.org/#t
[3]: https://lore.kernel.org/lkml/20201125092208.12544-10-rppt@kernel.org/

Affected products

VendorProductAffectedFixed
Linux Linux 5.14 5.15.169

Fixed in Linux distributions

Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.

ReleasePackageFixed inAdvisory
Debian 14 linux 6.11.4-1 —
Debian 13 linux 6.11.4-1 —
Debian 12 linux 6.1.115-1 —
Debian 11 linux-6.1 6.1.119-1~deb11u1 DLA-4008-1
ReleasePackageFixed inAdvisory
Ubuntu Nvidia-BlueField 22.04 LTS linux-bluefield 5.15.0-1060.62 —
Ubuntu 24.04 LTS linux 6.8.0-56.58 USN-7383-1
Ubuntu 24.04 LTS linux-aws 6.8.0-1025.27 USN-7383-1
Ubuntu 24.04 LTS linux-azure 6.8.0-1025.30 USN-7384-1
Ubuntu 24.04 LTS linux-azure-6.11 6.11.0-1012.12~24.04.1 —
Ubuntu 24.04 LTS linux-azure-nvidia 6.8.0-1014.15 USN-7468-1
Ubuntu 24.04 LTS linux-gcp 6.8.0-1026.28 USN-7383-1
Ubuntu 24.04 LTS linux-gcp-6.11 6.11.0-1011.11~24.04.1 —
Ubuntu 24.04 LTS linux-gke 6.8.0-1021.25 USN-7383-1
Ubuntu 24.04 LTS linux-gkeop 6.8.0-1008.10 USN-7383-1
Ubuntu 24.04 LTS linux-ibm 6.8.0-1022.22 USN-7385-1
Ubuntu 24.04 LTS linux-nvidia 6.8.0-1024.27 USN-7383-1
Ubuntu 24.04 LTS linux-nvidia-6.11 6.11.0-1007.7 —
Ubuntu 24.04 LTS linux-nvidia-lowlatency 6.8.0-1024.27.1 USN-7383-1
Ubuntu 24.04 LTS linux-nvidia-tegra 6.8.0-1004.4 —
Ubuntu 24.04 LTS linux-oem-6.11 6.11.0-1015.15 USN-7310-1
Ubuntu 24.04 LTS linux-oem-6.8 6.8.0-1024.24 USN-7386-1
Ubuntu 24.04 LTS linux-oracle 6.8.0-1022.23 USN-7383-1
Ubuntu 24.04 LTS linux-raspi 6.8.0-1028.32 USN-7524-1
Ubuntu 24.04 LTS linux-realtime +1 No fix yet —
Ubuntu 24.04 LTS linux-riscv +1 6.8.0-56.58.1 USN-7383-1
Ubuntu 24.04 LTS linux-xilinx 6.8.0-1017.18 —
Ubuntu 22.04 LTS linux 5.15.0-133.144 USN-7288-1
Ubuntu 22.04 LTS linux-aws 5.15.0-1078.85 USN-7308-1
Ubuntu 22.04 LTS linux-aws-6.8 6.8.0-1027.29~22.04.1 USN-7451-1
Ubuntu 22.04 LTS linux-azure 5.15.0-1081.90 USN-7289-1
Ubuntu 22.04 LTS linux-azure-6.8 6.8.0-1025.30~22.04.1 USN-7384-2
Ubuntu 22.04 LTS linux-azure-fde 5.15.0-1081.90.1 USN-7289-1
Ubuntu 22.04 LTS linux-gcp 5.15.0-1077.86 USN-7291-1
Ubuntu 22.04 LTS linux-gcp-6.8 6.8.0-1026.28~22.04.1 USN-7383-1
Ubuntu 22.04 LTS linux-gke +1 5.15.0-1075.81 USN-7291-1, USN-7289-1
Ubuntu 22.04 LTS linux-gkeop 5.15.0-1060.68 USN-7289-1
Ubuntu 22.04 LTS linux-hwe-6.8 6.8.0-57.59~22.04.1 USN-7403-1
Ubuntu 22.04 LTS linux-ibm 5.15.0-1070.73 USN-7289-3
Ubuntu 22.04 LTS linux-ibm-6.8 6.8.0-1023.23~22.04.1 —
Ubuntu 22.04 LTS linux-intel-iotg 5.15.0-1073.79 USN-7289-4
Ubuntu 22.04 LTS linux-kvm 5.15.0-1076.81 USN-7388-1
Ubuntu 22.04 LTS linux-lowlatency 5.15.0-133.143 USN-7288-1
Ubuntu 22.04 LTS linux-nvidia 5.15.0-1072.73 USN-7289-1
Ubuntu 22.04 LTS linux-nvidia-6.8 6.8.0-1024.27~22.04.1 USN-7383-1
Ubuntu 22.04 LTS linux-nvidia-tegra 5.15.0-1033.33 USN-7389-1
Ubuntu 22.04 LTS linux-nvidia-tegra-igx 5.15.0-1021.21 USN-7389-1
Ubuntu 22.04 LTS linux-oracle-6.8 6.8.0-1022.23~22.04.1 USN-7383-1
Ubuntu 22.04 LTS linux-raspi 5.15.0-1072.75 USN-7305-1
Ubuntu 22.04 LTS linux-riscv +31 No fix yet —
Ubuntu 22.04 LTS linux-riscv-6.8 +1 6.8.0-56.58.1~22.04.1 USN-7383-1
Ubuntu 22.04 LTS linux-xilinx-zynqmp 5.15.0-1044.48 USN-7390-1
Ubuntu 20.04 LTS linux-aws-5.15 5.15.0-1080.87~20.04.1 USN-7388-1
Ubuntu 20.04 LTS linux-azure-5.15 5.15.0-1081.90~20.04.1 USN-7289-2
Ubuntu 20.04 LTS linux-azure-fde-5.15 5.15.0-1081.90~20.04.1.1 USN-7289-2
Ubuntu 20.04 LTS linux-gcp-5.15 5.15.0-1077.86~20.04.1 USN-7291-1
Ubuntu 20.04 LTS linux-gke +27 No fix yet —
Ubuntu 20.04 LTS linux-hwe-5.15 5.15.0-134.145~20.04.1 USN-7331-1
Ubuntu 20.04 LTS linux-ibm-5.15 5.15.0-1074.77~20.04.1 USN-7458-1
Ubuntu 20.04 LTS linux-intel-iotg-5.15 5.15.0-1073.79~20.04.2 USN-7289-4
Ubuntu 20.04 LTS linux-lowlatency-hwe-5.15 5.15.0-133.143~20.04.1 USN-7288-2
Ubuntu 20.04 LTS linux-oracle-5.15 5.15.0-1075.81~20.04.1 USN-7289-2
Ubuntu 20.04 LTS linux-riscv-5.15 5.15.0-1073.77~20.04.1 —
Ubuntu 18.04 LTS linux-gcp +13 No fix yet —
Show 7 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Ubuntu Pro Realtime 24.04 LTS linux-raspi-realtime 6.8.0-2023.24 USN-7523-1
Ubuntu Pro Realtime 24.04 LTS linux-realtime 6.8.1-1018.19 USN-7383-2
Ubuntu Pro Realtime 22.04 LTS linux-intel-iot-realtime 5.15.0-1071.73 —
Ubuntu Pro Realtime 22.04 LTS linux-realtime 5.15.0-1078.86 —
Ubuntu Pro Realtime 22.04 LTS linux-realtime-6.8 6.8.1-1018.19~22.04.1 —
Ubuntu Pro FIPS-updates 24.04 LTS linux-fips 6.8.0-78.78+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-aws-fips 5.15.0-1078.85+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-azure-fips 5.15.0-1080.89+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-fips 5.15.0-133.144+fips1 —
Ubuntu Pro FIPS-updates 22.04 LTS linux-gcp-fips 5.15.0-1077.86+fips1 —
Ubuntu Pro FIPS-preview 22.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro 20.04 LTS linux-nvidia-tegra-5.15 5.15.0-1039.39~20.04.1 —
ReleasePackageFixed inAdvisory
RHEL 9 rv +77 5.14.0-570.12.1.el9_6 RHSA-2025:6966
ReleasePackageFixed inAdvisory
SLES 15 SP6 kernel-64kb +6 6.4.0-150600.23.30.1 SUSE-SU-2024:4318-1
SLES 15 SP6 kernel-azure +2 6.4.0-150600.8.20.1 SUSE-SU-2024:4316-1
SLES 15 SP6 kernel-coco +3 6.4.0-15061.9.coco15sp6.1 SUSE-SU-2024:4387-1
SLES 15 SP6 kernel-default-base 6.4.0-150600.23.30.1.150600.12.12.6 SUSE-SU-2024:4318-1
SLES 15 SP5 kernel-64kb +6 5.14.21-150500.55.88.1 SUSE-SU-2024:4364-1
SLES 15 SP5 kernel-azure +2 5.14.21-150500.33.75.1 SUSE-SU-2024:4376-1
SLES 15 SP5 kernel-default-base 5.14.21-150500.55.88.1.150500.6.39.4 SUSE-SU-2024:4364-1
Show 7 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLE Micro 6.1 kernel-default-base 6.4.0-24.1.21.4 SUSE-SU-2025:20247-1
SLE Micro 6.1 kernel-livepatch-MICRO-6-0-RT_Update_4 1-1.1 SUSE-SU-2025:20246-1
SLE Micro 6.1 kernel-livepatch-MICRO-6-0_Update_4 1-1.2 SUSE-SU-2025:20247-1
SLE Micro 6.1 kernel-rt +1 6.4.0-22.1 SUSE-SU-2025:20246-1
SLE Micro 6.1 kernel-source +2 6.4.0-24.1 SUSE-SU-2025:20247-1
SLE Micro 6.0 kernel-default-base 6.4.0-24.1.21.4 SUSE-SU-2025:20164-1
SLE Micro 6.0 kernel-livepatch-MICRO-6-0-RT_Update_4 1-1.1 SUSE-SU-2025:20163-1
SLE Micro 6.0 kernel-livepatch-MICRO-6-0_Update_4 1-1.2 SUSE-SU-2025:20164-1
SLE Micro 6.0 kernel-rt +1 6.4.0-22.1 SUSE-SU-2025:20163-1
SLE Micro 6.0 kernel-source +2 6.4.0-24.1 SUSE-SU-2025:20164-1
SLE Micro 5.5 kernel-default 5.14.21-150500.55.88.1 SUSE-SU-2024:4364-1
SLE Micro 5.5 kernel-default-base 5.14.21-150500.55.88.1.150500.6.39.4 SUSE-SU-2024:4364-1
SLE Micro 5.5 kernel-rt +1 5.14.21-150500.13.79.1 SUSE-SU-2024:4315-1
SLE Live Patching 15 SP6 kernel-default 6.4.0-150600.23.30.1 SUSE-SU-2024:4318-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6-RT_Update_6 1-150600.1.3.1 SUSE-SU-2024:4314-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6_Update_6 1-150600.13.3.5 SUSE-SU-2024:4318-1
SLE Live Patching 15 SP5 kernel-default 5.14.21-150500.55.88.1 SUSE-SU-2024:4364-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5-RT_Update_23 1-150500.11.3.1 SUSE-SU-2024:4315-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_21 1-150500.11.5.1 SUSE-SU-2024:4364-1
SUSE Real Time Module 15 SP6 kernel-rt +3 6.4.0-150600.10.20.1 SUSE-SU-2024:4314-1
SUSE Real Time Module 15 SP5 kernel-rt +3 5.14.21-150500.13.79.1 SUSE-SU-2024:4315-1
ReleasePackageFixed inAdvisory
openSUSE Tumbleweed kernel-source 6.11.8-1.1 openSUSE-SU-2024:14500-1
openSUSE Tumbleweed kernel-source-longterm 6.12.11-1.1 openSUSE-SU-2025:14705-1
openSUSE Leap 15.6 dtb-aarch64 +10 6.4.0-150600.23.30.1 SUSE-SU-2024:4318-1
openSUSE Leap 15.6 kernel-azure +2 6.4.0-150600.8.20.1 SUSE-SU-2024:4316-1
openSUSE Leap 15.6 kernel-default-base 6.4.0-150600.23.30.1.150600.12.12.6 SUSE-SU-2024:4318-1
openSUSE Leap 15.6 kernel-rt +3 6.4.0-150600.10.20.1 SUSE-SU-2024:4314-1
openSUSE Leap 15.5 kernel-azure +2 5.14.21-150500.33.75.1 SUSE-SU-2024:4376-1
openSUSE Leap 15.5 kernel-rt +3 5.14.21-150500.13.79.1 SUSE-SU-2024:4315-1
Show 1 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
openSUSE Leap Micro 5.5 kernel-rt 5.14.21-150500.13.79.1 SUSE-SU-2024:4315-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 kernel-livepatch-6.1.115-126.197 1.0-0.amzn2023 ALAS2023-2025-794
Amazon Linux 2023 perf +14 6.1.115-126.197.amzn2023 ALAS2023-2025-794

Azure Linux

ReleasePackageFixed inAdvisory
Azure Linux 2 (CBL-Mariner) kernel 5.15.173.1-1 —

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 9 bpftool 7.5.0-802.el9_6 ELSA-2025-6966
Oracle Linux 9 rv +28 5.14.0-570.12.1.0.1.el9_6 ELSA-2025-6966
Oracle Linux 8 bpftool +13 5.15.0-303.171.5.2.el9uek ELSA-2024-12887

Advisories 45

References