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High · 7.8 CVE-2025-68183 EUVD-2025-203713GHSA-w26q-x7h4-9gc5

ima: don't clear IMA_DIGSIG flag when setting or removing non-IMA xattr

Published Dec 16, 2025 · Updated Oct 30, 2026 · Assigned by Linux

Vendor: Linux Product: Linux 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-6.14 Package: linux-aws-6.17 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-6.14 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-5.15 Package: linux-azure-fde-5.19 Package: linux-azure-fde-6.14 Package: linux-azure-fde-6.2 Package: linux-azure-fde-6.8 Package: linux-azure-fips Package: linux-azure-nvidia Package: linux-azure-nvidia-6.14 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-6.14 Package: linux-gcp-6.17 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-6.11 Package: linux-hwe-6.14 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-6.11 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-6.17 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-6.14 Package: linux-oem-6.17 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-6.14 Package: linux-oracle-6.17 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-6.14 Package: linux-realtime-6.17 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-6.14 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: Debian Ecosystem: Ubuntu

Description

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

ima: don't clear IMA_DIGSIG flag when setting or removing non-IMA xattr

Currently when both IMA and EVM are in fix mode, the IMA signature will
be reset to IMA hash if a program first stores IMA signature in
security.ima and then writes/removes some other security xattr for the
file.

For example, on Fedora, after booting the kernel with "ima_appraise=fix
evm=fix ima_policy=appraise_tcb" and installing rpm-plugin-ima,
installing/reinstalling a package will not make good reference IMA
signature generated. Instead IMA hash is generated,

# getfattr -m - -d -e hex /usr/bin/bash
# file: usr/bin/bash
security.ima=0x0404...

This happens because when setting security.selinux, the IMA_DIGSIG flag
that had been set early was cleared. As a result, IMA hash is generated
when the file is closed.

Similarly, IMA signature can be cleared on file close after removing
security xattr like security.evm or setting/removing ACL.

Prevent replacing the IMA file signature with a file hash, by preventing
the IMA_DIGSIG flag from being reset.

Here's a minimal C reproducer which sets security.selinux as the last
step which can also replaced by removing security.evm or setting ACL,

#include <stdio.h>
#include <sys/xattr.h>
#include <fcntl.h>
#include <unistd.h>
#include <string.h>
#include <stdlib.h>

int main() {
const char* file_path = "/usr/sbin/test_binary";
const char* hex_string = "030204d33204490066306402304";
int length = strlen(hex_string);
char* ima_attr_value;
int fd;

fd = open(file_path, O_WRONLY|O_CREAT|O_EXCL, 0644);
if (fd == -1) {
perror("Error opening file");
return 1;
}

ima_attr_value = (char*)malloc(length / 2 );
for (int i = 0, j = 0; i < length; i += 2, j++) {
sscanf(hex_string + i, "%2hhx", &ima_attr_value[j]);
}

if (fsetxattr(fd, "security.ima", ima_attr_value, length/2, 0) == -1) {
perror("Error setting extended attribute");
close(fd);
return 1;
}

const char* selinux_value= "system_u:object_r:bin_t:s0";
if (fsetxattr(fd, "security.selinux", selinux_value, strlen(selinux_value), 0) == -1) {
perror("Error setting extended attribute");
close(fd);
return 1;
}

close(fd);

return 0;
}

Affected products

VendorProductAffectedFixed
Linux Linux 5.14 6.1.191

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 6.17.8-1 —
Debian 13 linux 6.12.63-1 —
Debian 12 linux No fix yet —
ReleasePackageFixed inAdvisory
Ubuntu Nvidia-BlueField 24.04 LTS linux-bluefield 6.8.0-1017.21 —
Ubuntu Nvidia-BlueField 22.04 LTS linux-bluefield No fix yet —
Ubuntu 25.10 linux 6.17.0-14.14 USN-8029-1
Ubuntu 25.10 linux-aws +2 6.17.0-1007.7 USN-8030-1, USN-8029-2
Ubuntu 25.10 linux-azure +1 6.17.0-1008.8 USN-8029-3, USN-8029-1
Ubuntu 25.10 linux-azure-fde No fix yet —
Ubuntu 25.10 linux-realtime 6.17.0-1006.7 USN-8029-1
Ubuntu 25.10 linux-riscv 6.17.0-14.14.1 —
Ubuntu 24.04 LTS linux 6.8.0-106.106 USN-8095-1
Ubuntu 24.04 LTS linux-aws 6.8.0-1050.53 USN-8095-1
Ubuntu 24.04 LTS linux-aws-6.17 +1 6.17.0-1007.7~24.04.1 —
Ubuntu 24.04 LTS linux-azure 6.8.0-1051.57 USN-8125-1
Ubuntu 24.04 LTS linux-azure-fde 6.8.0-1058.65 —
Ubuntu 24.04 LTS linux-azure-nvidia 6.8.0-1039.42 —
Ubuntu 24.04 LTS linux-gcp 6.8.0-1052.55 USN-8095-1
Ubuntu 24.04 LTS linux-gcp-6.17 6.17.0-1008.8~24.04.1 —
Ubuntu 24.04 LTS linux-gke 6.8.0-1048.53 USN-8095-1
Ubuntu 24.04 LTS linux-gkeop 6.8.0-1035.38 USN-8095-1
Ubuntu 24.04 LTS linux-ibm 6.8.0-1049.49 USN-8095-1
Ubuntu 24.04 LTS linux-lowlatency 6.8.0-106.106.1 USN-8095-1
Ubuntu 24.04 LTS linux-nvidia 6.8.0-1049.52 USN-8100-1
Ubuntu 24.04 LTS linux-nvidia-6.17 6.17.0-1008.8 —
Ubuntu 24.04 LTS linux-nvidia-lowlatency 6.8.0-1049.52.1 USN-8100-1
Ubuntu 24.04 LTS linux-nvidia-tegra 6.8.0-1020.20 —
Ubuntu 24.04 LTS linux-oem-6.17 6.17.0-1011.11 USN-8048-1
Ubuntu 24.04 LTS linux-oracle 6.8.0-1047.48 USN-8095-1
Ubuntu 24.04 LTS linux-raspi 6.8.0-1050.54 USN-8095-5
Ubuntu 24.04 LTS linux-riscv +18 No fix yet —
Ubuntu 24.04 LTS linux-xilinx 6.8.0-1028.29 USN-8261-1
Ubuntu 22.04 LTS linux +49 No fix yet —
Ubuntu 22.04 LTS linux-aws-6.8 6.8.0-1050.53~22.04.1 USN-8095-4
Ubuntu 22.04 LTS linux-azure-6.8 6.8.0-1051.57~22.04.1 USN-8126-1
Ubuntu 22.04 LTS linux-azure-fde-6.8 6.8.0-1058.65~22.04.1 —
Ubuntu 22.04 LTS linux-gcp-6.8 6.8.0-1052.55~22.04.1 USN-8095-1
Ubuntu 22.04 LTS linux-hwe-6.8 +1 6.8.0-106.106~22.04.1 USN-8095-1
Ubuntu 22.04 LTS linux-ibm-6.8 6.8.0-1049.49~22.04.1 USN-8095-1
Ubuntu 22.04 LTS linux-lowlatency-hwe-6.8 6.8.0-106.106.1~22.04.1 USN-8095-1
Ubuntu 22.04 LTS linux-nvidia-6.8 6.8.0-1049.52~22.04.1 USN-8100-1
Ubuntu 22.04 LTS linux-oracle-6.8 6.8.0-1047.48~22.04.1 USN-8095-1
Show 9 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
Ubuntu 20.04 LTS linux-gke +28 No fix yet —
Ubuntu 18.04 LTS linux-gcp +14 No fix yet —
Ubuntu 16.04 LTS linux-hwe-edge No fix yet —
Ubuntu Pro Realtime 24.04 LTS linux-raspi-realtime 6.8.0-2040.41 USN-8095-5
Ubuntu Pro Realtime 24.04 LTS linux-realtime 6.8.1-1045.46 USN-8095-3
Ubuntu Pro Realtime 24.04 LTS linux-realtime-6.14 No fix yet —
Ubuntu Pro Realtime 24.04 LTS linux-realtime-6.17 6.17.0-1006.7~24.04.1 —
Ubuntu Pro Realtime 22.04 LTS linux-realtime +1 No fix yet —
Ubuntu Pro Realtime 22.04 LTS linux-realtime-6.8 6.8.1-1045.46~22.04.1 USN-8095-3
Ubuntu Pro FIPS-updates 24.04 LTS linux-aws-fips 6.8.0-1050.53+fips1 USN-8095-2
Ubuntu Pro FIPS-updates 24.04 LTS linux-azure-fips 6.8.0-1052.58+fips1 USN-8165-1
Ubuntu Pro FIPS-updates 24.04 LTS linux-fips 6.8.0-106.106+fips1 USN-8095-2
Ubuntu Pro FIPS-updates 24.04 LTS linux-gcp-fips 6.8.0-1052.55+fips1 USN-8095-2
Ubuntu Pro FIPS-updates 22.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro FIPS-preview 22.04 LTS linux-fips +3 No fix yet —
Ubuntu Pro 20.04 LTS linux-aws-5.15 +10 No fix yet —
ReleasePackageFixed inAdvisory
RHEL 10 rv +76 6.12.0-211.18.1.el10_2 RHSA-2026:21557
RHEL 9 rv +75 5.14.0-687.12.1.el9_8 RHSA-2026:21556
RHEL 8 kernel-rt +12 4.18.0-553.126.1.rt7.467.el8_10 RHSA-2026:21745
RHEL 8 perf +26 4.18.0-553.126.1.el8_10 RHSA-2026:21706
Show 10 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
RHEL 10.0 EUS rv +77 6.12.0-55.88.1.el10_0 RHSA-2026:39371
RHEL 9.6 EUS rv +77 5.14.0-570.127.1.el9_6 RHSA-2026:38902
RHEL 9.4 E4S bpftool 7.3.0-427.136.1.el9_4 RHSA-2026:36767
RHEL 9.4 E4S rv +62 5.14.0-427.136.1.el9_4 RHSA-2026:36767
RHEL 9.2 E4S bpftool 7.0.0-284.179.1.el9_2 RHSA-2026:36073
RHEL 9.2 E4S kernel-rt +14 5.14.0-284.179.1.rt14.464.el9_2 RHSA-2026:35904
RHEL 9.2 E4S perf +47 5.14.0-284.179.1.el9_2 RHSA-2026:36073
RHEL 8.8 TUS perf +17 4.18.0-477.152.1.el8_8 RHSA-2026:40760
RHEL 8.8 E4S perf +18 4.18.0-477.152.1.el8_8 RHSA-2026:40760
RHEL 8.6 EUS Long Life perf +17 4.18.0-372.201.1.el8_6 RHSA-2026:40068
RHEL 8.6 AUS perf +17 4.18.0-372.201.1.el8_6 RHSA-2026:40068
RHEL 8.4 EUS Long Life perf +17 4.18.0-305.199.1.el8_4 RHSA-2026:47633
RHEL 8.4 AUS perf +17 4.18.0-305.199.1.el8_4 RHSA-2026:47633

AlmaLinux

Errata ↗
ReleasePackageFixed inAdvisory
AlmaLinux 10 rv +74 6.12.0-211.18.1.el10_2 ALSA-2026:21557
AlmaLinux 9 rv +73 5.14.0-687.12.1.el9_8 ALSA-2026:21556
AlmaLinux 8 kernel-rt +9 4.18.0-553.126.1.rt7.467.el8_10 ALSA-2026:21745
AlmaLinux 8 perf +24 4.18.0-553.126.1.el8_10 ALSA-2026:21706

Rocky Linux

Errata ↗
ReleasePackageFixed inAdvisory
Rocky Linux 10 kernel 6.12.0-211.18.1.el10_2 RLSA-2026:21557
Rocky Linux 9 kernel 5.14.0-687.12.1.el9_8 RLSA-2026:21556
Rocky Linux 8 kernel 4.18.0-553.126.1.el8_10 RLSA-2026:21706
Rocky Linux 8 kernel-rt 4.18.0-553.126.1.rt7.467.el8_10 RLSA-2026:21745
ReleasePackageFixed inAdvisory
SLES 15 SP7 kernel-64kb +6 6.4.0-150700.53.28.1 SUSE-SU-2026:0315-1
SLES 15 SP7 kernel-azure +2 6.4.0-150700.20.24.1 SUSE-SU-2026:0281-1
SLES 15 SP7 kernel-default-base 6.4.0-150700.53.28.1.150700.17.19.1 SUSE-SU-2026:0315-1
SLES 15 SP6 kernel-64kb +6 6.4.0-150600.23.84.1 SUSE-SU-2026:0293-1
SLES 15 SP6 kernel-default-base 6.4.0-150600.23.84.1.150600.12.38.1 SUSE-SU-2026:0293-1
SLES 15 SP5 kernel-64kb +6 5.14.21-150500.55.136.1 SUSE-SU-2026:0474-1
SLES 15 SP5 kernel-default-base 5.14.21-150500.55.136.1.150500.6.67.1 SUSE-SU-2026:0474-1
SLES 15 SP4 kernel-64kb +6 5.14.21-150400.24.194.1 SUSE-SU-2026:0617-1
SLES 15 SP4 kernel-default-base 5.14.21-150400.24.194.1.150400.24.98.3 SUSE-SU-2026:0617-1
Show 18 more (older releases, extended support, other products)
ReleasePackageFixed inAdvisory
SLES for SAP 16.0 kernel-64kb +8 6.12.0-160000.9.1 SUSE-SU-2026:20220-1
SLES for SAP 16.0 kernel-default-base 6.12.0-160000.9.1.160000.2.6 SUSE-SU-2026:20220-1
SLES for SAP 15 SP6 kernel-default-base 6.4.0-150600.23.84.1.150600.12.38.1 SUSE-SU-2026:0293-1
SLES for SAP 15 SP6 kernel-docs +4 6.4.0-150600.23.84.1 SUSE-SU-2026:0293-1
SLES for SAP 15 SP5 kernel-default-base 5.14.21-150500.55.136.1.150500.6.67.1 SUSE-SU-2026:0474-1
SLES for SAP 15 SP5 kernel-docs +4 5.14.21-150500.55.136.1 SUSE-SU-2026:0474-1
SLES for SAP 15 SP4 kernel-default-base 5.14.21-150400.24.194.1.150400.24.98.3 SUSE-SU-2026:0617-1
SLES for SAP 15 SP4 kernel-docs +4 5.14.21-150400.24.194.1 SUSE-SU-2026:0617-1
SLES 16.0 kernel-64kb +8 6.12.0-160000.9.1 SUSE-SU-2026:20228-1, SUSE-SU-2026:20220-1
SLES 16.0 kernel-default-base 6.12.0-160000.9.1.160000.2.6 SUSE-SU-2026:20220-1
SLE Micro 6.2 kernel-default-base 6.12.0-160000.9.1.160000.2.6 SUSE-SU-2026:20207-1
SLE Micro 6.2 kernel-rt +5 6.12.0-160000.9.1 SUSE-SU-2026:20564-1, SUSE-SU-2026:20207-1
SLE Micro 6.1 kernel-default-base 6.4.0-39.1.21.16 SUSE-SU-2026:20498-1
SLE Micro 6.1 kernel-rt +1 6.4.0-40.1 SUSE-SU-2026:20876-1
SLE Micro 6.1 kernel-source +2 6.4.0-39.1 SUSE-SU-2026:20498-1
SLE Micro 6.0 kernel-default-base 6.4.0-39.1.21.16 SUSE-SU-2026:20477-1
SLE Micro 6.0 kernel-rt +1 6.4.0-40.1 SUSE-SU-2026:20845-1
SLE Micro 6.0 kernel-source +2 6.4.0-39.1 SUSE-SU-2026:20477-1
SLE Micro 5.5 kernel-default-base 5.14.21-150500.55.136.1.150500.6.67.1 SUSE-SU-2026:0474-1
SLE Micro 5.5 kernel-rt +1 5.14.21-150500.13.121.1 SUSE-SU-2026:0496-1
SLE Micro 5.5 kernel-source +1 5.14.21-150500.55.136.1 SUSE-SU-2026:0474-1
SLE Micro 5.4 kernel-default 5.14.21-150400.24.194.1 SUSE-SU-2026:0617-1
SLE Micro 5.4 kernel-default-base 5.14.21-150400.24.194.1.150400.24.98.3 SUSE-SU-2026:0617-1
SLE Micro 5.4 kernel-rt +1 5.14.21-150400.15.142.1 SUSE-SU-2026:0411-1
SLE Micro 5.3 kernel-default 5.14.21-150400.24.194.1 SUSE-SU-2026:0617-1
SLE Micro 5.3 kernel-default-base 5.14.21-150400.24.194.1.150400.24.98.3 SUSE-SU-2026:0617-1
SLE Micro 5.3 kernel-rt +1 5.14.21-150400.15.142.1 SUSE-SU-2026:0411-1
SLE Live Patching 15 SP7 kernel-default 6.4.0-150700.53.28.1 SUSE-SU-2026:0315-1
SLE Live Patching 15 SP7 kernel-livepatch-SLE15-SP7-RT_Update_8 1-150700.1.3.1 SUSE-SU-2026:0278-1
SLE Live Patching 15 SP7 kernel-livepatch-SLE15-SP7_Update_8 1-150700.15.3.1 SUSE-SU-2026:0315-1
SLE Live Patching 15 SP6 kernel-default 6.4.0-150600.23.84.1 SUSE-SU-2026:0293-1
SLE Live Patching 15 SP6 kernel-livepatch-SLE15-SP6_Update_19 1-150600.13.3.1 SUSE-SU-2026:0293-1
SLE Live Patching 15 SP5 kernel-default 5.14.21-150500.55.136.1 SUSE-SU-2026:0474-1
SLE Live Patching 15 SP5 kernel-livepatch-SLE15-SP5_Update_35 1-150500.11.3.1 SUSE-SU-2026:0474-1
SLE Live Patching 15 SP4 kernel-default 5.14.21-150400.24.194.1 SUSE-SU-2026:0617-1
SLE Live Patching 15 SP4 kernel-livepatch-SLE15-SP4_Update_48 1-150400.9.7.1 SUSE-SU-2026:0617-1
SLE HPC 15 SP5 kernel-64kb +5 5.14.21-150500.55.136.1 SUSE-SU-2026:0474-1
SLE HPC 15 SP5 kernel-default-base 5.14.21-150500.55.136.1.150500.6.67.1 SUSE-SU-2026:0474-1
SLE HPC 15 SP4 kernel-64kb +5 5.14.21-150400.24.194.1 SUSE-SU-2026:0617-1
SLE HPC 15 SP4 kernel-default-base 5.14.21-150400.24.194.1.150400.24.98.3 SUSE-SU-2026:0617-1
SUSE Real Time Module 15 SP7 kernel-rt +2 6.4.0-150700.7.28.1 SUSE-SU-2026:0278-1
ReleasePackageFixed inAdvisory
openSUSE Leap 16.0 kernel-default-base 6.12.0-160000.9.1.160000.2.6 openSUSE-SU-2026:20145-1
openSUSE Leap 16.0 kernel-rt +11 6.12.0-160000.9.1 openSUSE-SU-2026:20145-1
openSUSE Leap 15.6 dtb-aarch64 +10 6.4.0-150600.23.84.1 SUSE-SU-2026:0293-1
openSUSE Leap 15.6 kernel-default-base 6.4.0-150600.23.84.1.150600.12.38.1 SUSE-SU-2026:0293-1

Amazon Linux

ReleasePackageFixed inAdvisory
Amazon Linux 2023 kernel-livepatch-6.12.58-82.121 1:1.0-0.amzn2023 ALAS2023-2026-1495
Amazon Linux 2023 perf6.12 +14 1:6.12.58-82.121.amzn2023 ALAS2023-2026-1495

Oracle Linux

ReleasePackageFixed inAdvisory
Oracle Linux 10 rv +29 6.12.0-211.34.1.el10_2 ELSA-2026-21557
Oracle Linux 9 kernel-uek +34 6.12.0-107.59.3.2.el10uek ELSA-2026-50006
Oracle Linux 9 rv +28 5.14.0-687.17.1.el9_8 ELSA-2026-21556
Oracle Linux 8 perf +19 4.18.0-553.126.1.el8_10 ELSA-2026-21706

Advisories 50

References