CVE-2026-31671

xfrm_user: fix info leak in build_report()

CVE-2026-31671 is fixed in 105 products on 1 platform, first by ALAS2023-2026-1694, released May 8, 2026. It is not reported as exploited. Patch Radar priority: Routine.

Routine
CVSS
5.5
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0012
1st percentile

In the Linux kernel, the following vulnerability has been resolved: xfrm_user: fix info leak in build_report() struct xfrm_user_report is a __u8 proto field followed by a struct xfrm_selector which means there is three "empty" bytes of padding, but the padding is never zeroed before copying to userspace. Fix that up by zeroing the structure before setting individual member variables.

Where it's fixed

ProductFixed inFixReleased
Linux
bpftool · amzn 2023 1:6.1.170-210.320.amzn2023 ALAS2023-2026-1694 May 8, 2026
bpftool-debuginfo · amzn 2023 1:6.1.170-210.320.amzn2023 ALAS2023-2026-1694 May 8, 2026
bpftool6.12 · amzn 2023 1:6.12.83-113.160.amzn2023 ALAS2023-2026-1695 May 8, 2026
bpftool6.12-debuginfo · amzn 2023 1:6.12.83-113.160.amzn2023 ALAS2023-2026-1695 May 8, 2026
bpftool6.18 · amzn 2023 1:6.18.25-55.108.amzn2023 ALAS2023-2026-1693 May 8, 2026
bpftool6.18-debuginfo · amzn 2023 1:6.18.25-55.108.amzn2023 ALAS2023-2026-1693 May 8, 2026
dtb-aarch64 · opensuse-leap 16.0 6.12.0-160000.35.1 OPENSUSE-SU-2026:20965-1 Jun 15, 2026
kernel · amzn 2023 1:6.1.170-210.320.amzn2023 ALAS2023-2026-1694 May 8, 2026
kernel-64kb · opensuse-leap 16.0 6.12.0-160000.35.1 OPENSUSE-SU-2026:20965-1 Jun 15, 2026
kernel-64kb · sles 15.7 6.4.0-150700.53.60.1 SUSE-SU-2026:2482-1 Jun 22, 2026
kernel-64kb · sles 16.0 6.12.0-160000.35.1 SUSE-SU-2026:22127-1 Jun 15, 2026
kernel-azure · opensuse-leap 16.0 6.12.0-160000.35.1 OPENSUSE-SU-2026:20965-1 Jun 15, 2026
kernel-azure · sles 15.7 6.4.0-150700.53.60.1 SUSE-SU-2026:2482-1 Jun 22, 2026
kernel-azure · sles 16.0 6.12.0-160000.35.1 SUSE-SU-2026:22127-1 Jun 15, 2026
kernel-debuginfo · amzn 2023 1:6.1.170-210.320.amzn2023 ALAS2023-2026-1694 May 8, 2026
kernel-debuginfo-common-aarch64 · amzn 2023 1:6.1.170-210.320.amzn2023 ALAS2023-2026-1694 May 8, 2026
kernel-debuginfo-common-x86_64 · amzn 2023 1:6.1.170-210.320.amzn2023 ALAS2023-2026-1694 May 8, 2026
kernel-default · opensuse-leap 16.0 6.12.0-160000.35.1 OPENSUSE-SU-2026:20965-1 Jun 15, 2026
kernel-default · sles 15.7 6.4.0-150700.53.60.1 SUSE-SU-2026:2482-1 Jun 22, 2026
kernel-default · sles 16.0 6.12.0-160000.35.1 SUSE-SU-2026:22127-1 Jun 15, 2026
kernel-default-base · opensuse-leap 16.0 6.12.0-160000.35.1.160000.2.16 OPENSUSE-SU-2026:20965-1 Jun 15, 2026
kernel-default-base · sles 15.7 6.4.0-150700.53.60.1.150700.17.35.4 SUSE-SU-2026:2482-1 Jun 22, 2026
kernel-default-base · sles 16.0 6.12.0-160000.35.1.160000.2.16 SUSE-SU-2026:22127-1 Jun 15, 2026
kernel-devel · amzn 2023 1:6.1.170-210.320.amzn2023 ALAS2023-2026-1694 May 8, 2026
kernel-docs · opensuse-leap 16.0 6.12.0-160000.35.1 OPENSUSE-SU-2026:20965-1 Jun 15, 2026
kernel-docs · sles 15.7 6.4.0-150700.53.60.1 SUSE-SU-2026:2482-1 Jun 22, 2026
kernel-docs · sles 16.0 6.12.0-160000.35.1 SUSE-SU-2026:22127-1 Jun 15, 2026
kernel-headers · amzn 2023 1:6.1.170-210.320.amzn2023 ALAS2023-2026-1694 May 8, 2026
kernel-kvmsmall · opensuse-leap 16.0 6.12.0-160000.35.1 OPENSUSE-SU-2026:20965-1 Jun 15, 2026
kernel-kvmsmall · sles 16.0 6.12.0-160000.35.1 SUSE-SU-2026:22127-1 Jun 15, 2026
kernel-livepatch-6.1.170-210.320 · amzn 2023 1:1.0-0.amzn2023 ALAS2023-2026-1694 May 8, 2026
kernel-livepatch-6.12.83-113.160 · amzn 2023 1:1.0-0.amzn2023 ALAS2023-2026-1695 May 8, 2026
kernel-livepatch-6.18.25-55.108 · amzn 2023 1:1.0-0.amzn2023 ALAS2023-2026-1693 May 8, 2026
kernel-livepatch-SLE15-SP7-RT_Update_16 · sles 15.7 1-150700.1.5.2 SUSE-SU-2026:2591-1 Jun 23, 2026
kernel-livepatch-SLE15-SP7_Update_16 · sles 15.7 1-150700.15.3.2 SUSE-SU-2026:2482-1 Jun 22, 2026
kernel-modules-extra · amzn 2023 1:6.1.170-210.320.amzn2023 ALAS2023-2026-1694 May 8, 2026
kernel-modules-extra-common · amzn 2023 1:6.1.170-210.320.amzn2023 ALAS2023-2026-1694 May 8, 2026
kernel-obs-build · opensuse-leap 16.0 6.12.0-160000.35.1 OPENSUSE-SU-2026:20965-1 Jun 15, 2026
kernel-obs-build · sles 15.7 6.4.0-150700.53.60.2 SUSE-SU-2026:2482-1 Jun 22, 2026
kernel-obs-qa · opensuse-leap 16.0 6.12.0-160000.35.1 OPENSUSE-SU-2026:20965-1 Jun 15, 2026
kernel-obs-qa · sles 16.0 6.12.0-160000.35.1 SUSE-SU-2026:22127-1 Jun 15, 2026
kernel-rt · opensuse-leap 16.0 6.12.0-160000.35.1 OPENSUSE-SU-2026:20965-1 Jun 15, 2026
kernel-source · opensuse-leap 16.0 6.12.0-160000.35.1 OPENSUSE-SU-2026:20965-1 Jun 15, 2026
kernel-source · sles 15.7 6.4.0-150700.53.60.1 SUSE-SU-2026:2482-1 Jun 22, 2026
kernel-source · sles 16.0 6.12.0-160000.35.1 SUSE-SU-2026:22127-1 Jun 15, 2026
kernel-syms · opensuse-leap 16.0 6.12.0-160000.35.1 OPENSUSE-SU-2026:20965-1 Jun 15, 2026
kernel-syms · sles 15.7 6.4.0-150700.53.60.1 SUSE-SU-2026:2482-1 Jun 22, 2026
kernel-syms · sles 16.0 6.12.0-160000.35.1 SUSE-SU-2026:22127-1 Jun 15, 2026
kernel-tools · amzn 2023 1:6.1.170-210.320.amzn2023 ALAS2023-2026-1694 May 8, 2026
kernel-tools-debuginfo · amzn 2023 1:6.1.170-210.320.amzn2023 ALAS2023-2026-1694 May 8, 2026
kernel-tools-devel · amzn 2023 1:6.1.170-210.320.amzn2023 ALAS2023-2026-1694 May 8, 2026
kernel-uek · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-core · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-core · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-core · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-core · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-devel · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-devel · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-core · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-core · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-deprecated · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-deprecated · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-desktop · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-desktop · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-extra · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-extra · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-extra-netfilter · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-extra-netfilter · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-usb · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-usb · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-wireless · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-debug-modules-wireless · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-devel · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-devel · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-doc · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-doc · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-core · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-core · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-deprecated · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-deprecated · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-desktop · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-desktop · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-extra · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-extra · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-extra-netfilter · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-extra-netfilter · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-usb · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-usb · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-wireless · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-modules-wireless · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-tools · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek-tools · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-core · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-core · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-devel · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-devel · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-core · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-core · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-deprecated · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-deprecated · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-desktop · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-desktop · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-extra · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-extra · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-extra-netfilter · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-extra-netfilter · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-usb · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-usb · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-wireless · ol 10 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-uek64k-modules-wireless · ol 9 0:6.12.0-204.92.4.2.el9uek ELSA-2026-50372 Jul 2, 2026
kernel-zfcpdump · opensuse-leap 16.0 6.12.0-160000.35.1 OPENSUSE-SU-2026:20965-1 Jun 15, 2026
kernel-zfcpdump · sles 15.7 6.4.0-150700.53.60.1 SUSE-SU-2026:2482-1 Jun 22, 2026
kernel-zfcpdump · sles 16.0 6.12.0-160000.35.1 SUSE-SU-2026:22127-1 Jun 15, 2026
kernel6.12 · amzn 2023 1:6.12.83-113.160.amzn2023 ALAS2023-2026-1695 May 8, 2026
kernel6.12-debuginfo · amzn 2023 1:6.12.83-113.160.amzn2023 ALAS2023-2026-1695 May 8, 2026
kernel6.12-debuginfo-common-aarch64 · amzn 2023 1:6.12.83-113.160.amzn2023 ALAS2023-2026-1695 May 8, 2026
kernel6.12-debuginfo-common-x86_64 · amzn 2023 1:6.12.83-113.160.amzn2023 ALAS2023-2026-1695 May 8, 2026
kernel6.12-devel · amzn 2023 1:6.12.83-113.160.amzn2023 ALAS2023-2026-1695 May 8, 2026
kernel6.12-headers · amzn 2023 1:6.12.83-113.160.amzn2023 ALAS2023-2026-1695 May 8, 2026
kernel6.12-modules-extra · amzn 2023 1:6.12.83-113.160.amzn2023 ALAS2023-2026-1695 May 8, 2026
kernel6.12-modules-extra-common · amzn 2023 1:6.12.83-113.160.amzn2023 ALAS2023-2026-1695 May 8, 2026
kernel6.12-tools · amzn 2023 1:6.12.83-113.160.amzn2023 ALAS2023-2026-1695 May 8, 2026
kernel6.12-tools-debuginfo · amzn 2023 1:6.12.83-113.160.amzn2023 ALAS2023-2026-1695 May 8, 2026
kernel6.12-tools-devel · amzn 2023 1:6.12.83-113.160.amzn2023 ALAS2023-2026-1695 May 8, 2026
kernel6.18 · amzn 2023 1:6.18.25-55.108.amzn2023 ALAS2023-2026-1693 May 8, 2026
kernel6.18-debuginfo · amzn 2023 1:6.18.25-55.108.amzn2023 ALAS2023-2026-1693 May 8, 2026
kernel6.18-debuginfo-common-aarch64 · amzn 2023 1:6.18.25-55.108.amzn2023 ALAS2023-2026-1693 May 8, 2026
kernel6.18-debuginfo-common-x86_64 · amzn 2023 1:6.18.25-55.108.amzn2023 ALAS2023-2026-1693 May 8, 2026
kernel6.18-devel · amzn 2023 1:6.18.25-55.108.amzn2023 ALAS2023-2026-1693 May 8, 2026
kernel6.18-headers · amzn 2023 1:6.18.25-55.108.amzn2023 ALAS2023-2026-1693 May 8, 2026
kernel6.18-modules-extra · amzn 2023 1:6.18.25-55.108.amzn2023 ALAS2023-2026-1693 May 8, 2026
kernel6.18-modules-extra-common · amzn 2023 1:6.18.25-55.108.amzn2023 ALAS2023-2026-1693 May 8, 2026
kernel6.18-tools · amzn 2023 1:6.18.25-55.108.amzn2023 ALAS2023-2026-1693 May 8, 2026
kernel6.18-tools-debuginfo · amzn 2023 1:6.18.25-55.108.amzn2023 ALAS2023-2026-1693 May 8, 2026
kernel6.18-tools-devel · amzn 2023 1:6.18.25-55.108.amzn2023 ALAS2023-2026-1693 May 8, 2026
linux · Debian 12.15 (bookworm) 6.1.170-1 DEBIAN-CVE-2026-31671 May 15, 2026
linux · Debian 13.5 (trixie) 6.12.85-1 DEBIAN-CVE-2026-31671 May 15, 2026
linux · Debian 14 6.19.13-1 DEBIAN-CVE-2026-31671 May 15, 2026
perf · amzn 2023 1:6.1.170-210.320.amzn2023 ALAS2023-2026-1694 May 8, 2026
perf-debuginfo · amzn 2023 1:6.1.170-210.320.amzn2023 ALAS2023-2026-1694 May 8, 2026
perf6.12 · amzn 2023 1:6.12.83-113.160.amzn2023 ALAS2023-2026-1695 May 8, 2026
perf6.12-debuginfo · amzn 2023 1:6.12.83-113.160.amzn2023 ALAS2023-2026-1695 May 8, 2026
perf6.18 · amzn 2023 1:6.18.25-55.108.amzn2023 ALAS2023-2026-1693 May 8, 2026
perf6.18-debuginfo · amzn 2023 1:6.18.25-55.108.amzn2023 ALAS2023-2026-1693 May 8, 2026
python3-perf · amzn 2023 1:6.1.170-210.320.amzn2023 ALAS2023-2026-1694 May 8, 2026
python3-perf-debuginfo · amzn 2023 1:6.1.170-210.320.amzn2023 ALAS2023-2026-1694 May 8, 2026
python3-perf6.12 · amzn 2023 1:6.12.83-113.160.amzn2023 ALAS2023-2026-1695 May 8, 2026
python3-perf6.12-debuginfo · amzn 2023 1:6.12.83-113.160.amzn2023 ALAS2023-2026-1695 May 8, 2026
python3-perf6.18 · amzn 2023 1:6.18.25-55.108.amzn2023 ALAS2023-2026-1693 May 8, 2026
python3-perf6.18-debuginfo · amzn 2023 1:6.18.25-55.108.amzn2023 ALAS2023-2026-1693 May 8, 2026

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