CVE-2026-23223
xfs: fix UAF in xchk_btree_check_block_owner
CVE-2026-23223 is fixed in 71 products on 1 platform, first by DEBIAN-CVE-2026-23223, released February 18, 2026. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.8
Moderate
Exploitation
None reported
No vendor assessment
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0014
3rd percentile
In the Linux kernel, the following vulnerability has been resolved: xfs: fix UAF in xchk_btree_check_block_owner We cannot dereference bs->cur when trying to determine if bs->cur aliases bs->sc->sa.{bno,rmap}_cur after the latter has been freed. Fix this by sampling before type before any freeing could happen. The correct temporal ordering was broken when we removed xfs_btnum_t.
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Linux | |||
| bpftool6.12 · amzn 2023 | 1:6.12.73-95.123.amzn2023 | ALAS2023-2026-1487 | Mar 16, 2026 |
| bpftool6.12-debuginfo · amzn 2023 | 1:6.12.73-95.123.amzn2023 | ALAS2023-2026-1487 | Mar 16, 2026 |
| dtb-aarch64 · opensuse-leap 16.0 | 6.12.0-160000.27.1 | OPENSUSE-SU-2026:20416-1 | Mar 25, 2026 |
| kernel-64kb · opensuse-leap 16.0 | 6.12.0-160000.27.1 | OPENSUSE-SU-2026:20416-1 | Mar 25, 2026 |
| kernel-64kb · sles 16.0 | 6.12.0-160000.27.1 | SUSE-SU-2026:20931-1 | Mar 25, 2026 |
| kernel-azure · opensuse-leap 16.0 | 6.12.0-160000.27.1 | OPENSUSE-SU-2026:20416-1 | Mar 25, 2026 |
| kernel-azure · sles 16.0 | 6.12.0-160000.27.1 | SUSE-SU-2026:20931-1 | Mar 25, 2026 |
| kernel-default · opensuse-leap 16.0 | 6.12.0-160000.27.1 | OPENSUSE-SU-2026:20416-1 | Mar 25, 2026 |
| kernel-default · sles 16.0 | 6.12.0-160000.27.1 | SUSE-SU-2026:20931-1 | Mar 25, 2026 |
| kernel-default-base · opensuse-leap 16.0 | 6.12.0-160000.27.1.160000.2.8 | OPENSUSE-SU-2026:20416-1 | Mar 25, 2026 |
| kernel-default-base · sles 16.0 | 6.12.0-160000.27.1.160000.2.8 | SUSE-SU-2026:20931-1 | Mar 25, 2026 |
| kernel-docs · opensuse-leap 16.0 | 6.12.0-160000.27.1 | OPENSUSE-SU-2026:20416-1 | Mar 25, 2026 |
| kernel-docs · sles 16.0 | 6.12.0-160000.27.1 | SUSE-SU-2026:20931-1 | Mar 25, 2026 |
| kernel-kvmsmall · opensuse-leap 16.0 | 6.12.0-160000.27.1 | OPENSUSE-SU-2026:20416-1 | Mar 25, 2026 |
| kernel-kvmsmall · sles 16.0 | 6.12.0-160000.27.1 | SUSE-SU-2026:20931-1 | Mar 25, 2026 |
| kernel-livepatch-6.12.73-95.123 · amzn 2023 | 1:1.0-0.amzn2023 | ALAS2023-2026-1487 | Mar 16, 2026 |
| kernel-obs-build · opensuse-leap 16.0 | 6.12.0-160000.27.1 | OPENSUSE-SU-2026:20416-1 | Mar 25, 2026 |
| kernel-obs-qa · opensuse-leap 16.0 | 6.12.0-160000.27.1 | OPENSUSE-SU-2026:20416-1 | Mar 25, 2026 |
| kernel-obs-qa · sles 16.0 | 6.12.0-160000.27.1 | SUSE-SU-2026:20931-1 | Mar 25, 2026 |
| kernel-rt · opensuse-leap 16.0 | 6.12.0-160000.27.1 | OPENSUSE-SU-2026:20416-1 | Mar 25, 2026 |
| kernel-source · opensuse-leap 16.0 | 6.12.0-160000.27.1 | OPENSUSE-SU-2026:20416-1 | Mar 25, 2026 |
| kernel-source · sles 16.0 | 6.12.0-160000.27.1 | SUSE-SU-2026:20931-1 | Mar 25, 2026 |
| kernel-syms · opensuse-leap 16.0 | 6.12.0-160000.27.1 | OPENSUSE-SU-2026:20416-1 | Mar 25, 2026 |
| kernel-syms · sles 16.0 | 6.12.0-160000.27.1 | SUSE-SU-2026:20931-1 | Mar 25, 2026 |
| kernel-uek · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-core · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-core · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-debug · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-debug · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-debug-core · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-debug-core · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-debug-devel · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-debug-devel · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-debug-modules · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-debug-modules · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-debug-modules-core · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-debug-modules-core · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-debug-modules-deprecated · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-debug-modules-deprecated · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-debug-modules-desktop · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-debug-modules-desktop · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-debug-modules-extra · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-debug-modules-extra · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-debug-modules-extra-netfilter · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-debug-modules-extra-netfilter · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-debug-modules-usb · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-debug-modules-usb · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-debug-modules-wireless · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-debug-modules-wireless · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-devel · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-devel · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-doc · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-doc · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-modules · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-modules · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-modules-core · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-modules-core · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-modules-deprecated · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-modules-deprecated · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-modules-desktop · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-modules-desktop · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-modules-extra · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-modules-extra · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-modules-extra-netfilter · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-modules-extra-netfilter · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-modules-usb · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-modules-usb · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-modules-wireless · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-modules-wireless · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-tools · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek-tools · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek64k · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek64k · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek64k-core · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek64k-core · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek64k-devel · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek64k-devel · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek64k-modules · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek64k-modules · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek64k-modules-core · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek64k-modules-core · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek64k-modules-deprecated · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek64k-modules-deprecated · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek64k-modules-desktop · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek64k-modules-desktop · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek64k-modules-extra · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek64k-modules-extra · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek64k-modules-extra-netfilter · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek64k-modules-extra-netfilter · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek64k-modules-usb · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek64k-modules-usb · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek64k-modules-wireless · ol 10 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-uek64k-modules-wireless · ol 9 | 0:6.12.0-201.74.2.1.el9uek | ELSA-2026-50232 | Apr 15, 2026 |
| kernel-zfcpdump · opensuse-leap 16.0 | 6.12.0-160000.27.1 | OPENSUSE-SU-2026:20416-1 | Mar 25, 2026 |
| kernel-zfcpdump · sles 16.0 | 6.12.0-160000.27.1 | SUSE-SU-2026:20931-1 | Mar 25, 2026 |
| kernel6.12 · amzn 2023 | 1:6.12.73-95.123.amzn2023 | ALAS2023-2026-1487 | Mar 16, 2026 |
| kernel6.12-debuginfo · amzn 2023 | 1:6.12.73-95.123.amzn2023 | ALAS2023-2026-1487 | Mar 16, 2026 |
| kernel6.12-debuginfo-common-aarch64 · amzn 2023 | 1:6.12.73-95.123.amzn2023 | ALAS2023-2026-1487 | Mar 16, 2026 |
| kernel6.12-debuginfo-common-x86_64 · amzn 2023 | 1:6.12.73-95.123.amzn2023 | ALAS2023-2026-1487 | Mar 16, 2026 |
| kernel6.12-devel · amzn 2023 | 1:6.12.73-95.123.amzn2023 | ALAS2023-2026-1487 | Mar 16, 2026 |
| kernel6.12-headers · amzn 2023 | 1:6.12.73-95.123.amzn2023 | ALAS2023-2026-1487 | Mar 16, 2026 |
| kernel6.12-libbpf · amzn 2023 | 1:6.12.73-95.123.amzn2023 | ALAS2023-2026-1487 | Mar 16, 2026 |
| kernel6.12-libbpf-debuginfo · amzn 2023 | 1:6.12.73-95.123.amzn2023 | ALAS2023-2026-1487 | Mar 16, 2026 |
| kernel6.12-libbpf-devel · amzn 2023 | 1:6.12.73-95.123.amzn2023 | ALAS2023-2026-1487 | Mar 16, 2026 |
| kernel6.12-libbpf-static · amzn 2023 | 1:6.12.73-95.123.amzn2023 | ALAS2023-2026-1487 | Mar 16, 2026 |
| kernel6.12-modules-extra · amzn 2023 | 1:6.12.73-95.123.amzn2023 | ALAS2023-2026-1487 | Mar 16, 2026 |
| kernel6.12-modules-extra-common · amzn 2023 | 1:6.12.73-95.123.amzn2023 | ALAS2023-2026-1487 | Mar 16, 2026 |
| kernel6.12-tools · amzn 2023 | 1:6.12.73-95.123.amzn2023 | ALAS2023-2026-1487 | Mar 16, 2026 |
| kernel6.12-tools-debuginfo · amzn 2023 | 1:6.12.73-95.123.amzn2023 | ALAS2023-2026-1487 | Mar 16, 2026 |
| kernel6.12-tools-devel · amzn 2023 | 1:6.12.73-95.123.amzn2023 | ALAS2023-2026-1487 | Mar 16, 2026 |
| linux · Debian 13.5 (trixie) | 6.12.73-1 | DEBIAN-CVE-2026-23223 | Feb 18, 2026 |
| linux · Debian 14 | 6.18.12-1 | DEBIAN-CVE-2026-23223 | Feb 18, 2026 |
| perf6.12 · amzn 2023 | 1:6.12.73-95.123.amzn2023 | ALAS2023-2026-1487 | Mar 16, 2026 |
| perf6.12-debuginfo · amzn 2023 | 1:6.12.73-95.123.amzn2023 | ALAS2023-2026-1487 | Mar 16, 2026 |
| python3-perf6.12 · amzn 2023 | 1:6.12.73-95.123.amzn2023 | ALAS2023-2026-1487 | Mar 16, 2026 |
| python3-perf6.12-debuginfo · amzn 2023 | 1:6.12.73-95.123.amzn2023 | ALAS2023-2026-1487 | Mar 16, 2026 |
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