CVE-2026-98251

openvswitch: avoid reallocating confirmed conntrack labels

CVE-2026-98251 is fixed in 95 products on 1 platform, first by DEBIAN-CVE-2026-98251, released October 6, 2026. It is not reported as exploited. Patch Radar priority: Urgent.

Urgent
CVSS
9.8
Critical
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0013
2nd percentile

In the Linux kernel, the following vulnerability has been resolved: openvswitch: avoid reallocating confirmed conntrack labels ovs_ct_get_conn_labels() adds the labels extension when a conntrack entry does not have one. Confirmed conntracks can be read locklessly, so adding an extension may reallocate and free the extension block while another CPU accesses it. Only add the extension for unconfirmed conntracks. A confirmed conntrack without labels now fails the caller's label operation instead of reallocating its extension storage.

Where it's fixed

ProductFixed inFixReleased
Linux
bpftool · amzn 2023 1:6.1.189-236.399.amzn2023 ALAS2023-2026-3336 Nov 7, 2026
bpftool · ol 8 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
bpftool · ol 9 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
bpftool-debuginfo · amzn 2023 1:6.1.189-236.399.amzn2023 ALAS2023-2026-3336 Nov 7, 2026
bpftool6.12 · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
bpftool6.12-debuginfo · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
bpftool6.18 · amzn 2023 1:6.18.54-121.166.amzn2023 ALAS2023-2026-3192 Nov 7, 2026
bpftool6.18-debuginfo · amzn 2023 1:6.18.54-121.166.amzn2023 ALAS2023-2026-3192 Nov 7, 2026
kernel · amzn 2023 1:6.1.189-236.399.amzn2023 ALAS2023-2026-3336 Nov 7, 2026
kernel-debuginfo · amzn 2023 1:6.1.189-236.399.amzn2023 ALAS2023-2026-3336 Nov 7, 2026
kernel-debuginfo-common-aarch64 · amzn 2023 1:6.1.189-236.399.amzn2023 ALAS2023-2026-3336 Nov 7, 2026
kernel-debuginfo-common-x86_64 · amzn 2023 1:6.1.189-236.399.amzn2023 ALAS2023-2026-3336 Nov 7, 2026
kernel-devel · amzn 2023 1:6.1.189-236.399.amzn2023 ALAS2023-2026-3336 Nov 7, 2026
kernel-headers · amzn 2023 1:6.1.189-236.399.amzn2023 ALAS2023-2026-3336 Nov 7, 2026
kernel-livepatch-6.1.189-236.399 · amzn 2023 1:1.0-0.amzn2023 ALAS2023-2026-3336 Nov 7, 2026
kernel-livepatch-6.12.113-138.209 · amzn 2023 1:1.0-0.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
kernel-livepatch-6.18.54-121.166 · amzn 2023 1:1.0-0.amzn2023 ALAS2023-2026-3192 Nov 7, 2026
kernel-modules-extra · amzn 2023 1:6.1.189-236.399.amzn2023 ALAS2023-2026-3336 Nov 7, 2026
kernel-modules-extra-common · amzn 2023 1:6.1.189-236.399.amzn2023 ALAS2023-2026-3336 Nov 7, 2026
kernel-tools · amzn 2023 1:6.1.189-236.399.amzn2023 ALAS2023-2026-3336 Nov 7, 2026
kernel-tools-debuginfo · amzn 2023 1:6.1.189-236.399.amzn2023 ALAS2023-2026-3336 Nov 7, 2026
kernel-tools-devel · amzn 2023 1:6.1.189-236.399.amzn2023 ALAS2023-2026-3336 Nov 7, 2026
kernel-uek · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek · ol 8 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek · ol 9 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-container · ol 8 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-container · ol 9 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-container-debug · ol 8 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-container-debug · ol 9 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-core · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-core · ol 8 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-core · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-core · ol 9 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-debug · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-debug · ol 8 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-debug · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-debug · ol 9 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-debug-core · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-debug-core · ol 8 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-debug-core · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-debug-core · ol 9 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-debug-devel · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-debug-devel · ol 8 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-debug-devel · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-debug-devel · ol 9 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-debug-modules · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-debug-modules · ol 8 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-debug-modules · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-debug-modules · ol 9 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-debug-modules-core · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-debug-modules-core · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-debug-modules-deprecated · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-debug-modules-deprecated · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-debug-modules-desktop · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-debug-modules-desktop · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-debug-modules-extra · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-debug-modules-extra · ol 8 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-debug-modules-extra · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-debug-modules-extra · ol 9 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-debug-modules-extra-netfilter · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-debug-modules-extra-netfilter · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-debug-modules-usb · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-debug-modules-usb · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-debug-modules-wireless · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-debug-modules-wireless · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-devel · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-devel · ol 8 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-devel · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-devel · ol 9 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-doc · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-doc · ol 8 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-doc · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-doc · ol 9 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-modules · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-modules · ol 8 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-modules · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-modules · ol 9 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-modules-core · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-modules-core · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-modules-deprecated · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-modules-deprecated · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-modules-desktop · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-modules-desktop · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-modules-extra · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-modules-extra · ol 8 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-modules-extra · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-modules-extra · ol 9 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek-modules-extra-netfilter · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-modules-extra-netfilter · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-modules-usb · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-modules-usb · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-modules-wireless · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-modules-wireless · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-tools · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek-tools · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek64k · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek64k · ol 8 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek64k · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek64k · ol 9 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek64k-core · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek64k-core · ol 8 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek64k-core · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek64k-core · ol 9 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek64k-devel · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek64k-devel · ol 8 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek64k-devel · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek64k-devel · ol 9 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek64k-modules · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek64k-modules · ol 8 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek64k-modules · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek64k-modules · ol 9 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek64k-modules-core · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek64k-modules-core · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek64k-modules-deprecated · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek64k-modules-deprecated · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek64k-modules-desktop · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek64k-modules-desktop · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek64k-modules-extra · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek64k-modules-extra · ol 8 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek64k-modules-extra · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek64k-modules-extra · ol 9 0:5.15.0-326.222.4.el9uek ELSA-2026-500574 Nov 7, 2026
kernel-uek64k-modules-extra-netfilter · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek64k-modules-extra-netfilter · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek64k-modules-usb · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek64k-modules-usb · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek64k-modules-wireless · ol 10 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel-uek64k-modules-wireless · ol 9 0:6.12.0-208.112.5.el9uek ELSA-2026-500572 Nov 7, 2026
kernel6.12 · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
kernel6.12-debuginfo · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
kernel6.12-debuginfo-common-aarch64 · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
kernel6.12-debuginfo-common-x86_64 · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
kernel6.12-devel · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
kernel6.12-headers · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
kernel6.12-modules-extra · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
kernel6.12-modules-extra-common · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
kernel6.12-tools · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
kernel6.12-tools-debuginfo · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
kernel6.12-tools-devel · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
kernel6.18 · amzn 2023 1:6.18.54-121.166.amzn2023 ALAS2023-2026-3192 Nov 7, 2026
kernel6.18-debuginfo · amzn 2023 1:6.18.54-121.166.amzn2023 ALAS2023-2026-3192 Nov 7, 2026
kernel6.18-debuginfo-common-aarch64 · amzn 2023 1:6.18.54-121.166.amzn2023 ALAS2023-2026-3192 Nov 7, 2026
kernel6.18-debuginfo-common-x86_64 · amzn 2023 1:6.18.54-121.166.amzn2023 ALAS2023-2026-3192 Nov 7, 2026
kernel6.18-devel · amzn 2023 1:6.18.54-121.166.amzn2023 ALAS2023-2026-3192 Nov 7, 2026
kernel6.18-headers · amzn 2023 1:6.18.54-121.166.amzn2023 ALAS2023-2026-3192 Nov 7, 2026
kernel6.18-modules-extra · amzn 2023 1:6.18.54-121.166.amzn2023 ALAS2023-2026-3192 Nov 7, 2026
kernel6.18-modules-extra-common · amzn 2023 1:6.18.54-121.166.amzn2023 ALAS2023-2026-3192 Nov 7, 2026
kernel6.18-tools · amzn 2023 1:6.18.54-121.166.amzn2023 ALAS2023-2026-3192 Nov 7, 2026
kernel6.18-tools-debuginfo · amzn 2023 1:6.18.54-121.166.amzn2023 ALAS2023-2026-3192 Nov 7, 2026
kernel6.18-tools-devel · amzn 2023 1:6.18.54-121.166.amzn2023 ALAS2023-2026-3192 Nov 7, 2026
linux · Debian 12.15 (bookworm) 6.1.190-1 DEBIAN-CVE-2026-98251 Oct 6, 2026
linux · Debian 13.5 (trixie) 6.12.113-1 DEBIAN-CVE-2026-98251 Oct 6, 2026
linux · Debian 14 7.2.8-1 DEBIAN-CVE-2026-98251 Oct 6, 2026
linux-6.12 · Debian 12.15 (bookworm) 6.12.113-1~deb12u1 DEBIAN-CVE-2026-98251 Oct 6, 2026
microvm-kernel · amzn 2023 1:6.1.189-236.399.amzn2023 ALAS2023-2026-3336 Nov 7, 2026
microvm-kernel6.18 · amzn 2023 1:6.18.54-121.166.amzn2023 ALAS2023-2026-3192 Nov 7, 2026
perf · amzn 2023 1:6.1.189-236.399.amzn2023 ALAS2023-2026-3336 Nov 7, 2026
perf-debuginfo · amzn 2023 1:6.1.189-236.399.amzn2023 ALAS2023-2026-3336 Nov 7, 2026
perf6.12 · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
perf6.12-debuginfo · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
perf6.18 · amzn 2023 1:6.18.54-121.166.amzn2023 ALAS2023-2026-3192 Nov 7, 2026
perf6.18-debuginfo · amzn 2023 1:6.18.54-121.166.amzn2023 ALAS2023-2026-3192 Nov 7, 2026
python3-perf · amzn 2023 1:6.1.189-236.399.amzn2023 ALAS2023-2026-3336 Nov 7, 2026
python3-perf-debuginfo · amzn 2023 1:6.1.189-236.399.amzn2023 ALAS2023-2026-3336 Nov 7, 2026
python3-perf6.12 · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
python3-perf6.12-debuginfo · amzn 2023 1:6.12.113-138.209.amzn2023 ALAS2023-2026-3335 Nov 7, 2026
python3-perf6.18 · amzn 2023 1:6.18.54-121.166.amzn2023 ALAS2023-2026-3192 Nov 7, 2026
python3-perf6.18-debuginfo · amzn 2023 1:6.18.54-121.166.amzn2023 ALAS2023-2026-3192 Nov 7, 2026

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