CVE-2026-89685

nfsd: fix clock domain mismatch in clients_still_reclaiming()

CVE-2026-89685 is fixed in 89 products on 1 platform, first by DEBIAN-CVE-2026-89685, released September 23, 2026. It is not reported as exploited. Patch Radar priority: High.

High
CVSS
7.5
Important
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0061
49th percentile

In the Linux kernel, the following vulnerability has been resolved: nfsd: fix clock domain mismatch in clients_still_reclaiming() clients_still_reclaiming() computes a deadline from nn->boot_time (CLOCK_REALTIME, ~1.7 billion) but compares it against ktime_get_boottime_seconds() (CLOCK_BOOTTIME, seconds since boot). The comparison is always false — it would take ~54 years of uptime for BOOTTIME to exceed the REALTIME-derived deadline. This means any client can hold the server in grace indefinitely by sending CLAIM_PREVIOUS OPEN requests, blocking all non-reclaim operations for all other clients. Add boot_time_bt (CLOCK_BOOTTIME) alongside the existing boot_time and use it for the deadline computation. boot_time (CLOCK_REALTIME) is preserved for its cl_boot clientid-nonce role.

Where it's fixed

ProductFixed inFixReleased
Linux
bpftool6.12 · amzn 2023 1:6.12.111-136.204.amzn2023 ALAS2023-2026-3193 Nov 7, 2026
bpftool6.12-debuginfo · amzn 2023 1:6.12.111-136.204.amzn2023 ALAS2023-2026-3193 Nov 7, 2026
bpftool6.18 · amzn 2023 1:6.18.51-120.162.amzn2023 ALAS2023-2026-3187 Nov 7, 2026
bpftool6.18-debuginfo · amzn 2023 1:6.18.51-120.162.amzn2023 ALAS2023-2026-3187 Nov 7, 2026
dtb-aarch64 · opensuse-leap 16.0 6.12.0-160000.39.1 OPENSUSE-SU-2026:22091-1 Nov 7, 2026
kernel-64kb · opensuse-leap 16.0 6.12.0-160000.39.1 OPENSUSE-SU-2026:22091-1 Nov 7, 2026
kernel-64kb · sles 15.7 6.4.0-150700.53.87.3 SUSE-SU-2026:4935-1 Nov 7, 2026
kernel-64kb · sles 16.0 6.12.0-160000.39.1 SUSE-SU-2026:24235-1 Nov 7, 2026
kernel-azure · opensuse-leap 16.0 6.12.0-160000.39.1 OPENSUSE-SU-2026:22091-1 Nov 7, 2026
kernel-azure · sles 15.7 6.4.0-150700.53.87.3 SUSE-SU-2026:4935-1 Nov 7, 2026
kernel-azure · sles 16.0 6.12.0-160000.39.1 SUSE-SU-2026:24235-1 Nov 7, 2026
kernel-default · opensuse-leap 16.0 6.12.0-160000.39.1 OPENSUSE-SU-2026:22091-1 Nov 7, 2026
kernel-default · sles 15.7 6.4.0-150700.53.87.3 SUSE-SU-2026:4935-1 Nov 7, 2026
kernel-default · sles 16.0 6.12.0-160000.39.1 SUSE-SU-2026:24197-1 Nov 7, 2026
kernel-default-base · opensuse-leap 16.0 6.12.0-160000.39.1.160000.2.25 OPENSUSE-SU-2026:22091-1 Nov 7, 2026
kernel-default-base · sles 15.7 6.4.0-150700.53.87.3.150700.17.49.2 SUSE-SU-2026:4935-1 Nov 7, 2026
kernel-default-base · sles 16.0 6.12.0-160000.39.1.160000.2.26 SUSE-SU-2026:24235-1 Nov 7, 2026
kernel-docs · opensuse-leap 16.0 6.12.0-160000.39.1 OPENSUSE-SU-2026:22091-1 Nov 7, 2026
kernel-docs · sles 15.7 6.4.0-150700.53.87.3 SUSE-SU-2026:4935-1 Nov 7, 2026
kernel-docs · sles 16.0 6.12.0-160000.39.1 SUSE-SU-2026:24235-1 Nov 7, 2026
kernel-kvmsmall · opensuse-leap 16.0 6.12.0-160000.39.1 OPENSUSE-SU-2026:22091-1 Nov 7, 2026
kernel-kvmsmall · sles 16.0 6.12.0-160000.39.1 SUSE-SU-2026:24235-1 Nov 7, 2026
kernel-livepatch-6.12.111-136.204 · amzn 2023 1:1.0-0.amzn2023 ALAS2023-2026-3193 Nov 7, 2026
kernel-livepatch-6.18.51-120.162 · amzn 2023 1:1.0-0.amzn2023 ALAS2023-2026-3187 Nov 7, 2026
kernel-livepatch-SLE15-SP7-RT_Update_22 · sles 15.7 1-150700.1.3.1 SUSE-SU-2026:4940-1 Nov 7, 2026
kernel-livepatch-SLE15-SP7_Update_23 · sles 15.7 1-150700.15.3.2 SUSE-SU-2026:4935-1 Nov 7, 2026
kernel-obs-build · opensuse-leap 16.0 6.12.0-160000.39.1 OPENSUSE-SU-2026:22091-1 Nov 7, 2026
kernel-obs-build · sles 15.7 6.4.0-150700.53.87.2 SUSE-SU-2026:4935-1 Nov 7, 2026
kernel-obs-qa · opensuse-leap 16.0 6.12.0-160000.39.1 OPENSUSE-SU-2026:22091-1 Nov 7, 2026
kernel-obs-qa · sles 16.0 6.12.0-160000.39.1 SUSE-SU-2026:24235-1 Nov 7, 2026
kernel-rt · opensuse-leap 16.0 6.12.0-160000.39.1 OPENSUSE-SU-2026:22091-1 Nov 7, 2026
kernel-source · opensuse-leap 16.0 6.12.0-160000.39.1 OPENSUSE-SU-2026:22091-1 Nov 7, 2026
kernel-source · sles 15.7 6.4.0-150700.53.87.3 SUSE-SU-2026:4935-1 Nov 7, 2026
kernel-source · sles 16.0 6.12.0-160000.39.1 SUSE-SU-2026:24235-1 Nov 7, 2026
kernel-syms · opensuse-leap 16.0 6.12.0-160000.39.1 OPENSUSE-SU-2026:22091-1 Nov 7, 2026
kernel-syms · sles 15.7 6.4.0-150700.53.87.1 SUSE-SU-2026:4935-1 Nov 7, 2026
kernel-syms · sles 16.0 6.12.0-160000.39.1 SUSE-SU-2026:24235-1 Nov 7, 2026
kernel-uek · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-core · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-core · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-debug · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-debug · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-debug-core · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-debug-core · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-debug-devel · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-debug-devel · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-debug-modules · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-debug-modules · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-debug-modules-core · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-debug-modules-core · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-debug-modules-deprecated · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-debug-modules-deprecated · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-debug-modules-desktop · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-debug-modules-desktop · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-debug-modules-extra · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-debug-modules-extra · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-debug-modules-extra-netfilter · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-debug-modules-extra-netfilter · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-debug-modules-usb · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-debug-modules-usb · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-debug-modules-wireless · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-debug-modules-wireless · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-devel · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-devel · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-doc · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-doc · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-modules · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-modules · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-modules-core · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-modules-core · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-modules-deprecated · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-modules-deprecated · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-modules-desktop · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-modules-desktop · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-modules-extra · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-modules-extra · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-modules-extra-netfilter · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-modules-extra-netfilter · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-modules-usb · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-modules-usb · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-modules-wireless · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-modules-wireless · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-tools · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek-tools · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek64k · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek64k · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek64k-core · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek64k-core · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek64k-devel · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek64k-devel · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek64k-modules · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek64k-modules · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek64k-modules-core · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek64k-modules-core · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek64k-modules-deprecated · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek64k-modules-deprecated · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek64k-modules-desktop · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek64k-modules-desktop · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek64k-modules-extra · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek64k-modules-extra · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek64k-modules-extra-netfilter · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek64k-modules-extra-netfilter · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek64k-modules-usb · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek64k-modules-usb · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek64k-modules-wireless · ol 10 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-uek64k-modules-wireless · ol 9 0:6.12.0-207.111.5.1.el9uek ELSA-2026-500374 Oct 7, 2026
kernel-zfcpdump · opensuse-leap 16.0 6.12.0-160000.39.1 OPENSUSE-SU-2026:22091-1 Nov 7, 2026
kernel-zfcpdump · sles 15.7 6.4.0-150700.53.87.3 SUSE-SU-2026:4935-1 Nov 7, 2026
kernel-zfcpdump · sles 16.0 6.12.0-160000.39.1 SUSE-SU-2026:24235-1 Nov 7, 2026
kernel6.12 · amzn 2023 1:6.12.111-136.204.amzn2023 ALAS2023-2026-3193 Nov 7, 2026
kernel6.12-debuginfo · amzn 2023 1:6.12.111-136.204.amzn2023 ALAS2023-2026-3193 Nov 7, 2026
kernel6.12-debuginfo-common-aarch64 · amzn 2023 1:6.12.111-136.204.amzn2023 ALAS2023-2026-3193 Nov 7, 2026
kernel6.12-debuginfo-common-x86_64 · amzn 2023 1:6.12.111-136.204.amzn2023 ALAS2023-2026-3193 Nov 7, 2026
kernel6.12-devel · amzn 2023 1:6.12.111-136.204.amzn2023 ALAS2023-2026-3193 Nov 7, 2026
kernel6.12-headers · amzn 2023 1:6.12.111-136.204.amzn2023 ALAS2023-2026-3193 Nov 7, 2026
kernel6.12-modules-extra · amzn 2023 1:6.12.111-136.204.amzn2023 ALAS2023-2026-3193 Nov 7, 2026
kernel6.12-modules-extra-common · amzn 2023 1:6.12.111-136.204.amzn2023 ALAS2023-2026-3193 Nov 7, 2026
kernel6.12-tools · amzn 2023 1:6.12.111-136.204.amzn2023 ALAS2023-2026-3193 Nov 7, 2026
kernel6.12-tools-debuginfo · amzn 2023 1:6.12.111-136.204.amzn2023 ALAS2023-2026-3193 Nov 7, 2026
kernel6.12-tools-devel · amzn 2023 1:6.12.111-136.204.amzn2023 ALAS2023-2026-3193 Nov 7, 2026
kernel6.18 · amzn 2023 1:6.18.51-120.162.amzn2023 ALAS2023-2026-3187 Nov 7, 2026
kernel6.18-debuginfo · amzn 2023 1:6.18.51-120.162.amzn2023 ALAS2023-2026-3187 Nov 7, 2026
kernel6.18-debuginfo-common-aarch64 · amzn 2023 1:6.18.51-120.162.amzn2023 ALAS2023-2026-3187 Nov 7, 2026
kernel6.18-debuginfo-common-x86_64 · amzn 2023 1:6.18.51-120.162.amzn2023 ALAS2023-2026-3187 Nov 7, 2026
kernel6.18-devel · amzn 2023 1:6.18.51-120.162.amzn2023 ALAS2023-2026-3187 Nov 7, 2026
kernel6.18-headers · amzn 2023 1:6.18.51-120.162.amzn2023 ALAS2023-2026-3187 Nov 7, 2026
kernel6.18-modules-extra · amzn 2023 1:6.18.51-120.162.amzn2023 ALAS2023-2026-3187 Nov 7, 2026
kernel6.18-modules-extra-common · amzn 2023 1:6.18.51-120.162.amzn2023 ALAS2023-2026-3187 Nov 7, 2026
kernel6.18-tools · amzn 2023 1:6.18.51-120.162.amzn2023 ALAS2023-2026-3187 Nov 7, 2026
kernel6.18-tools-debuginfo · amzn 2023 1:6.18.51-120.162.amzn2023 ALAS2023-2026-3187 Nov 7, 2026
kernel6.18-tools-devel · amzn 2023 1:6.18.51-120.162.amzn2023 ALAS2023-2026-3187 Nov 7, 2026
linux · Debian 13.5 (trixie) 6.12.111-1 DEBIAN-CVE-2026-89685 Sep 23, 2026
linux · Debian 14 7.2.6-1 DEBIAN-CVE-2026-89685 Sep 23, 2026
linux-6.12 · Debian 12.15 (bookworm) 6.12.111-1~deb12u1 DEBIAN-CVE-2026-89685 Sep 23, 2026
microvm-kernel6.18 · amzn 2023 1:6.18.51-120.162.amzn2023 ALAS2023-2026-3187 Nov 7, 2026
perf6.12 · amzn 2023 1:6.12.111-136.204.amzn2023 ALAS2023-2026-3193 Nov 7, 2026
perf6.12-debuginfo · amzn 2023 1:6.12.111-136.204.amzn2023 ALAS2023-2026-3193 Nov 7, 2026
perf6.18 · amzn 2023 1:6.18.51-120.162.amzn2023 ALAS2023-2026-3187 Nov 7, 2026
perf6.18-debuginfo · amzn 2023 1:6.18.51-120.162.amzn2023 ALAS2023-2026-3187 Nov 7, 2026
python3-perf6.12 · amzn 2023 1:6.12.111-136.204.amzn2023 ALAS2023-2026-3193 Nov 7, 2026
python3-perf6.12-debuginfo · amzn 2023 1:6.12.111-136.204.amzn2023 ALAS2023-2026-3193 Nov 7, 2026
python3-perf6.18 · amzn 2023 1:6.18.51-120.162.amzn2023 ALAS2023-2026-3187 Nov 7, 2026
python3-perf6.18-debuginfo · amzn 2023 1:6.18.51-120.162.amzn2023 ALAS2023-2026-3187 Nov 7, 2026

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